1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only 2 # 2 # 3 # IP configuration 3 # IP configuration 4 # 4 # 5 config IP_MULTICAST 5 config IP_MULTICAST 6 bool "IP: multicasting" 6 bool "IP: multicasting" 7 help 7 help 8 This is code for addressing several 8 This is code for addressing several networked computers at once, 9 enlarging your kernel by about 2 KB. 9 enlarging your kernel by about 2 KB. You need multicasting if you 10 intend to participate in the MBONE, 10 intend to participate in the MBONE, a high bandwidth network on top 11 of the Internet which carries audio 11 of the Internet which carries audio and video broadcasts. More 12 information about the MBONE is on th 12 information about the MBONE is on the WWW at 13 <https://www.savetz.com/mbone/>. For 13 <https://www.savetz.com/mbone/>. For most people, it's safe to say N. 14 14 15 config IP_ADVANCED_ROUTER 15 config IP_ADVANCED_ROUTER 16 bool "IP: advanced router" 16 bool "IP: advanced router" 17 help 17 help 18 If you intend to run your Linux box 18 If you intend to run your Linux box mostly as a router, i.e. as a 19 computer that forwards and redistrib 19 computer that forwards and redistributes network packets, say Y; you 20 will then be presented with several 20 will then be presented with several options that allow more precise 21 control about the routing process. 21 control about the routing process. 22 22 23 The answer to this question won't di 23 The answer to this question won't directly affect the kernel: 24 answering N will just cause the conf 24 answering N will just cause the configurator to skip all the 25 questions about advanced routing. 25 questions about advanced routing. 26 26 27 Note that your box can only act as a 27 Note that your box can only act as a router if you enable IP 28 forwarding in your kernel; you can d 28 forwarding in your kernel; you can do that by saying Y to "/proc 29 file system support" and "Sysctl sup 29 file system support" and "Sysctl support" below and executing the 30 line 30 line 31 31 32 echo "1" > /proc/sys/net/ipv4/ip_for 32 echo "1" > /proc/sys/net/ipv4/ip_forward 33 33 34 at boot time after the /proc file sy 34 at boot time after the /proc file system has been mounted. 35 35 36 If you turn on IP forwarding, you sh 36 If you turn on IP forwarding, you should consider the rp_filter, which 37 automatically rejects incoming packe 37 automatically rejects incoming packets if the routing table entry 38 for their source address doesn't mat 38 for their source address doesn't match the network interface they're 39 arriving on. This has security advan 39 arriving on. This has security advantages because it prevents the 40 so-called IP spoofing, however it ca 40 so-called IP spoofing, however it can pose problems if you use 41 asymmetric routing (packets from you 41 asymmetric routing (packets from you to a host take a different path 42 than packets from that host to you) 42 than packets from that host to you) or if you operate a non-routing 43 host which has several IP addresses 43 host which has several IP addresses on different interfaces. To turn 44 rp_filter on use: 44 rp_filter on use: 45 45 46 echo 1 > /proc/sys/net/ipv4/conf/<de 46 echo 1 > /proc/sys/net/ipv4/conf/<device>/rp_filter 47 or 47 or 48 echo 1 > /proc/sys/net/ipv4/conf/all 48 echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter 49 49 50 Note that some distributions enable 50 Note that some distributions enable it in startup scripts. 51 For details about rp_filter strict a 51 For details about rp_filter strict and loose mode read 52 <file:Documentation/networking/ip-sy 52 <file:Documentation/networking/ip-sysctl.rst>. 53 53 54 If unsure, say N here. 54 If unsure, say N here. 55 55 56 config IP_FIB_TRIE_STATS 56 config IP_FIB_TRIE_STATS 57 bool "FIB TRIE statistics" 57 bool "FIB TRIE statistics" 58 depends on IP_ADVANCED_ROUTER 58 depends on IP_ADVANCED_ROUTER 59 help 59 help 60 Keep track of statistics on structur 60 Keep track of statistics on structure of FIB TRIE table. 61 Useful for testing and measuring TRI 61 Useful for testing and measuring TRIE performance. 62 62 63 config IP_MULTIPLE_TABLES 63 config IP_MULTIPLE_TABLES 64 bool "IP: policy routing" 64 bool "IP: policy routing" 65 depends on IP_ADVANCED_ROUTER 65 depends on IP_ADVANCED_ROUTER 66 select FIB_RULES 66 select FIB_RULES 67 help 67 help 68 Normally, a router decides what to d 68 Normally, a router decides what to do with a received packet based 69 solely on the packet's final destina 69 solely on the packet's final destination address. If you say Y here, 70 the Linux router will also be able t 70 the Linux router will also be able to take the packet's source 71 address into account. Furthermore, t 71 address into account. Furthermore, the TOS (Type-Of-Service) field 72 of the packet can be used for routin 72 of the packet can be used for routing decisions as well. 73 73 74 If you need more information, see th 74 If you need more information, see the Linux Advanced 75 Routing and Traffic Control document 75 Routing and Traffic Control documentation at 76 <https://lartc.org/howto/lartc.rpdb. 76 <https://lartc.org/howto/lartc.rpdb.html> 77 77 78 If unsure, say N. 78 If unsure, say N. 79 79 80 config IP_ROUTE_MULTIPATH 80 config IP_ROUTE_MULTIPATH 81 bool "IP: equal cost multipath" 81 bool "IP: equal cost multipath" 82 depends on IP_ADVANCED_ROUTER 82 depends on IP_ADVANCED_ROUTER 83 help 83 help 84 Normally, the routing tables specify 84 Normally, the routing tables specify a single action to be taken in 85 a deterministic manner for a given p 85 a deterministic manner for a given packet. If you say Y here 86 however, it becomes possible to atta 86 however, it becomes possible to attach several actions to a packet 87 pattern, in effect specifying severa 87 pattern, in effect specifying several alternative paths to travel 88 for those packets. The router consid 88 for those packets. The router considers all these paths to be of 89 equal "cost" and chooses one of them 89 equal "cost" and chooses one of them in a non-deterministic fashion 90 if a matching packet arrives. 90 if a matching packet arrives. 91 91 92 config IP_ROUTE_VERBOSE 92 config IP_ROUTE_VERBOSE 93 bool "IP: verbose route monitoring" 93 bool "IP: verbose route monitoring" 94 depends on IP_ADVANCED_ROUTER 94 depends on IP_ADVANCED_ROUTER 95 help 95 help 96 If you say Y here, which is recommen 96 If you say Y here, which is recommended, then the kernel will print 97 verbose messages regarding the routi 97 verbose messages regarding the routing, for example warnings about 98 received packets which look strange 98 received packets which look strange and could be evidence of an 99 attack or a misconfigured system som 99 attack or a misconfigured system somewhere. The information is 100 handled by the klogd daemon which is 100 handled by the klogd daemon which is responsible for kernel messages 101 ("man klogd"). 101 ("man klogd"). 102 102 103 config IP_ROUTE_CLASSID 103 config IP_ROUTE_CLASSID 104 bool 104 bool 105 105 106 config IP_PNP 106 config IP_PNP 107 bool "IP: kernel level autoconfigurati 107 bool "IP: kernel level autoconfiguration" 108 help 108 help 109 This enables automatic configuration 109 This enables automatic configuration of IP addresses of devices and 110 of the routing table during kernel b 110 of the routing table during kernel boot, based on either information 111 supplied on the kernel command line 111 supplied on the kernel command line or by BOOTP or RARP protocols. 112 You need to say Y only for diskless 112 You need to say Y only for diskless machines requiring network 113 access to boot (in which case you wa 113 access to boot (in which case you want to say Y to "Root file system 114 on NFS" as well), because all other 114 on NFS" as well), because all other machines configure the network 115 in their startup scripts. 115 in their startup scripts. 116 116 117 config IP_PNP_DHCP 117 config IP_PNP_DHCP 118 bool "IP: DHCP support" 118 bool "IP: DHCP support" 119 depends on IP_PNP 119 depends on IP_PNP 120 help 120 help 121 If you want your Linux box to mount 121 If you want your Linux box to mount its whole root file system (the 122 one containing the directory /) from 122 one containing the directory /) from some other computer over the 123 net via NFS and you want the IP addr 123 net via NFS and you want the IP address of your computer to be 124 discovered automatically at boot tim 124 discovered automatically at boot time using the DHCP protocol (a 125 special protocol designed for doing 125 special protocol designed for doing this job), say Y here. In case 126 the boot ROM of your network card wa 126 the boot ROM of your network card was designed for booting Linux and 127 does DHCP itself, providing all nece 127 does DHCP itself, providing all necessary information on the kernel 128 command line, you can say N here. 128 command line, you can say N here. 129 129 130 If unsure, say Y. Note that if you w 130 If unsure, say Y. Note that if you want to use DHCP, a DHCP server 131 must be operating on your network. 131 must be operating on your network. Read 132 <file:Documentation/admin-guide/nfs/ 132 <file:Documentation/admin-guide/nfs/nfsroot.rst> for details. 133 133 134 config IP_PNP_BOOTP 134 config IP_PNP_BOOTP 135 bool "IP: BOOTP support" 135 bool "IP: BOOTP support" 136 depends on IP_PNP 136 depends on IP_PNP 137 help 137 help 138 If you want your Linux box to mount 138 If you want your Linux box to mount its whole root file system (the 139 one containing the directory /) from 139 one containing the directory /) from some other computer over the 140 net via NFS and you want the IP addr 140 net via NFS and you want the IP address of your computer to be 141 discovered automatically at boot tim 141 discovered automatically at boot time using the BOOTP protocol (a 142 special protocol designed for doing 142 special protocol designed for doing this job), say Y here. In case 143 the boot ROM of your network card wa 143 the boot ROM of your network card was designed for booting Linux and 144 does BOOTP itself, providing all nec 144 does BOOTP itself, providing all necessary information on the kernel 145 command line, you can say N here. If 145 command line, you can say N here. If unsure, say Y. Note that if you 146 want to use BOOTP, a BOOTP server mu 146 want to use BOOTP, a BOOTP server must be operating on your network. 147 Read <file:Documentation/admin-guide 147 Read <file:Documentation/admin-guide/nfs/nfsroot.rst> for details. 148 148 149 config IP_PNP_RARP 149 config IP_PNP_RARP 150 bool "IP: RARP support" 150 bool "IP: RARP support" 151 depends on IP_PNP 151 depends on IP_PNP 152 help 152 help 153 If you want your Linux box to mount 153 If you want your Linux box to mount its whole root file system (the 154 one containing the directory /) from 154 one containing the directory /) from some other computer over the 155 net via NFS and you want the IP addr 155 net via NFS and you want the IP address of your computer to be 156 discovered automatically at boot tim 156 discovered automatically at boot time using the RARP protocol (an 157 older protocol which is being obsole 157 older protocol which is being obsoleted by BOOTP and DHCP), say Y 158 here. Note that if you want to use R 158 here. Note that if you want to use RARP, a RARP server must be 159 operating on your network. Read 159 operating on your network. Read 160 <file:Documentation/admin-guide/nfs/ 160 <file:Documentation/admin-guide/nfs/nfsroot.rst> for details. 161 161 162 config NET_IPIP 162 config NET_IPIP 163 tristate "IP: tunneling" 163 tristate "IP: tunneling" 164 select INET_TUNNEL 164 select INET_TUNNEL 165 select NET_IP_TUNNEL 165 select NET_IP_TUNNEL 166 help 166 help 167 Tunneling means encapsulating data o 167 Tunneling means encapsulating data of one protocol type within 168 another protocol and sending it over 168 another protocol and sending it over a channel that understands the 169 encapsulating protocol. This particu 169 encapsulating protocol. This particular tunneling driver implements 170 encapsulation of IP within IP, which 170 encapsulation of IP within IP, which sounds kind of pointless, but 171 can be useful if you want to make yo 171 can be useful if you want to make your (or some other) machine 172 appear on a different network than i 172 appear on a different network than it physically is, or to use 173 mobile-IP facilities (allowing lapto 173 mobile-IP facilities (allowing laptops to seamlessly move between 174 networks without changing their IP a 174 networks without changing their IP addresses). 175 175 176 Saying Y to this option will produce 176 Saying Y to this option will produce two modules ( = code which can 177 be inserted in and removed from the 177 be inserted in and removed from the running kernel whenever you 178 want). Most people won't need this a 178 want). Most people won't need this and can say N. 179 179 180 config NET_IPGRE_DEMUX 180 config NET_IPGRE_DEMUX 181 tristate "IP: GRE demultiplexer" 181 tristate "IP: GRE demultiplexer" 182 help 182 help 183 This is helper module to demultiplex 183 This is helper module to demultiplex GRE packets on GRE version field criteria. 184 Required by ip_gre and pptp modules. 184 Required by ip_gre and pptp modules. 185 185 186 config NET_IP_TUNNEL 186 config NET_IP_TUNNEL 187 tristate 187 tristate 188 select DST_CACHE 188 select DST_CACHE 189 select GRO_CELLS 189 select GRO_CELLS 190 default n 190 default n 191 191 192 config NET_IPGRE 192 config NET_IPGRE 193 tristate "IP: GRE tunnels over IP" 193 tristate "IP: GRE tunnels over IP" 194 depends on (IPV6 || IPV6=n) && NET_IPG 194 depends on (IPV6 || IPV6=n) && NET_IPGRE_DEMUX 195 select NET_IP_TUNNEL 195 select NET_IP_TUNNEL 196 help 196 help 197 Tunneling means encapsulating data o 197 Tunneling means encapsulating data of one protocol type within 198 another protocol and sending it over 198 another protocol and sending it over a channel that understands the 199 encapsulating protocol. This particu 199 encapsulating protocol. This particular tunneling driver implements 200 GRE (Generic Routing Encapsulation) 200 GRE (Generic Routing Encapsulation) and at this time allows 201 encapsulating of IPv4 or IPv6 over e 201 encapsulating of IPv4 or IPv6 over existing IPv4 infrastructure. 202 This driver is useful if the other e 202 This driver is useful if the other endpoint is a Cisco router: Cisco 203 likes GRE much better than the other 203 likes GRE much better than the other Linux tunneling driver ("IP 204 tunneling" above). In addition, GRE 204 tunneling" above). In addition, GRE allows multicast redistribution 205 through the tunnel. 205 through the tunnel. 206 206 207 config NET_IPGRE_BROADCAST 207 config NET_IPGRE_BROADCAST 208 bool "IP: broadcast GRE over IP" 208 bool "IP: broadcast GRE over IP" 209 depends on IP_MULTICAST && NET_IPGRE 209 depends on IP_MULTICAST && NET_IPGRE 210 help 210 help 211 One application of GRE/IP is to cons 211 One application of GRE/IP is to construct a broadcast WAN (Wide Area 212 Network), which looks like a normal 212 Network), which looks like a normal Ethernet LAN (Local Area 213 Network), but can be distributed all 213 Network), but can be distributed all over the Internet. If you want 214 to do that, say Y here and to "IP mu 214 to do that, say Y here and to "IP multicast routing" below. 215 215 216 config IP_MROUTE_COMMON 216 config IP_MROUTE_COMMON 217 bool 217 bool 218 depends on IP_MROUTE || IPV6_MROUTE 218 depends on IP_MROUTE || IPV6_MROUTE 219 219 220 config IP_MROUTE 220 config IP_MROUTE 221 bool "IP: multicast routing" 221 bool "IP: multicast routing" 222 depends on IP_MULTICAST 222 depends on IP_MULTICAST 223 select IP_MROUTE_COMMON 223 select IP_MROUTE_COMMON 224 help 224 help 225 This is used if you want your machin 225 This is used if you want your machine to act as a router for IP 226 packets that have several destinatio 226 packets that have several destination addresses. It is needed on the 227 MBONE, a high bandwidth network on t 227 MBONE, a high bandwidth network on top of the Internet which carries 228 audio and video broadcasts. In order 228 audio and video broadcasts. In order to do that, you would most 229 likely run the program mrouted. If y 229 likely run the program mrouted. If you haven't heard about it, you 230 don't need it. 230 don't need it. 231 231 232 config IP_MROUTE_MULTIPLE_TABLES 232 config IP_MROUTE_MULTIPLE_TABLES 233 bool "IP: multicast policy routing" 233 bool "IP: multicast policy routing" 234 depends on IP_MROUTE && IP_ADVANCED_RO 234 depends on IP_MROUTE && IP_ADVANCED_ROUTER 235 select FIB_RULES 235 select FIB_RULES 236 help 236 help 237 Normally, a multicast router runs a 237 Normally, a multicast router runs a userspace daemon and decides 238 what to do with a multicast packet b 238 what to do with a multicast packet based on the source and 239 destination addresses. If you say Y 239 destination addresses. If you say Y here, the multicast router 240 will also be able to take interfaces 240 will also be able to take interfaces and packet marks into 241 account and run multiple instances o 241 account and run multiple instances of userspace daemons 242 simultaneously, each one handling a 242 simultaneously, each one handling a single table. 243 243 244 If unsure, say N. 244 If unsure, say N. 245 245 246 config IP_PIMSM_V1 246 config IP_PIMSM_V1 247 bool "IP: PIM-SM version 1 support" 247 bool "IP: PIM-SM version 1 support" 248 depends on IP_MROUTE 248 depends on IP_MROUTE 249 help 249 help 250 Kernel side support for Sparse Mode 250 Kernel side support for Sparse Mode PIM (Protocol Independent 251 Multicast) version 1. This multicast 251 Multicast) version 1. This multicast routing protocol is used widely 252 because Cisco supports it. You need 252 because Cisco supports it. You need special software to use it 253 (pimd-v1). Please see <http://netweb 253 (pimd-v1). Please see <http://netweb.usc.edu/pim/> for more 254 information about PIM. 254 information about PIM. 255 255 256 Say Y if you want to use PIM-SM v1. 256 Say Y if you want to use PIM-SM v1. Note that you can say N here if 257 you just want to use Dense Mode PIM. 257 you just want to use Dense Mode PIM. 258 258 259 config IP_PIMSM_V2 259 config IP_PIMSM_V2 260 bool "IP: PIM-SM version 2 support" 260 bool "IP: PIM-SM version 2 support" 261 depends on IP_MROUTE 261 depends on IP_MROUTE 262 help 262 help 263 Kernel side support for Sparse Mode 263 Kernel side support for Sparse Mode PIM version 2. In order to use 264 this, you need an experimental routi 264 this, you need an experimental routing daemon supporting it (pimd or 265 gated-5). This routing protocol is n 265 gated-5). This routing protocol is not used widely, so say N unless 266 you want to play with it. 266 you want to play with it. 267 267 268 config SYN_COOKIES 268 config SYN_COOKIES 269 bool "IP: TCP syncookie support" 269 bool "IP: TCP syncookie support" 270 help 270 help 271 Normal TCP/IP networking is open to 271 Normal TCP/IP networking is open to an attack known as "SYN 272 flooding". This denial-of-service at 272 flooding". This denial-of-service attack prevents legitimate remote 273 users from being able to connect to 273 users from being able to connect to your computer during an ongoing 274 attack and requires very little work 274 attack and requires very little work from the attacker, who can 275 operate from anywhere on the Interne 275 operate from anywhere on the Internet. 276 276 277 SYN cookies provide protection again 277 SYN cookies provide protection against this type of attack. If you 278 say Y here, the TCP/IP stack will us 278 say Y here, the TCP/IP stack will use a cryptographic challenge 279 protocol known as "SYN cookies" to e 279 protocol known as "SYN cookies" to enable legitimate users to 280 continue to connect, even when your 280 continue to connect, even when your machine is under attack. There 281 is no need for the legitimate users 281 is no need for the legitimate users to change their TCP/IP software; 282 SYN cookies work transparently to th 282 SYN cookies work transparently to them. For technical information 283 about SYN cookies, check out <https: 283 about SYN cookies, check out <https://cr.yp.to/syncookies.html>. 284 284 285 If you are SYN flooded, the source a 285 If you are SYN flooded, the source address reported by the kernel is 286 likely to have been forged by the at 286 likely to have been forged by the attacker; it is only reported as 287 an aid in tracing the packets to the 287 an aid in tracing the packets to their actual source and should not 288 be taken as absolute truth. 288 be taken as absolute truth. 289 289 290 SYN cookies may prevent correct erro 290 SYN cookies may prevent correct error reporting on clients when the 291 server is really overloaded. If this 291 server is really overloaded. If this happens frequently better turn 292 them off. 292 them off. 293 293 294 If you say Y here, you can disable S 294 If you say Y here, you can disable SYN cookies at run time by 295 saying Y to "/proc file system suppo 295 saying Y to "/proc file system support" and 296 "Sysctl support" below and executing 296 "Sysctl support" below and executing the command 297 297 298 echo 0 > /proc/sys/net/ipv4/tcp_sync 298 echo 0 > /proc/sys/net/ipv4/tcp_syncookies 299 299 300 after the /proc file system has been 300 after the /proc file system has been mounted. 301 301 302 If unsure, say N. 302 If unsure, say N. 303 303 304 config NET_IPVTI 304 config NET_IPVTI 305 tristate "Virtual (secure) IP: tunneli 305 tristate "Virtual (secure) IP: tunneling" 306 depends on IPV6 || IPV6=n 306 depends on IPV6 || IPV6=n 307 select INET_TUNNEL 307 select INET_TUNNEL 308 select NET_IP_TUNNEL 308 select NET_IP_TUNNEL 309 select XFRM 309 select XFRM 310 help 310 help 311 Tunneling means encapsulating data o 311 Tunneling means encapsulating data of one protocol type within 312 another protocol and sending it over 312 another protocol and sending it over a channel that understands the 313 encapsulating protocol. This can be 313 encapsulating protocol. This can be used with xfrm mode tunnel to give 314 the notion of a secure tunnel for IP 314 the notion of a secure tunnel for IPSEC and then use routing protocol 315 on top. 315 on top. 316 316 317 config NET_UDP_TUNNEL 317 config NET_UDP_TUNNEL 318 tristate 318 tristate 319 select NET_IP_TUNNEL 319 select NET_IP_TUNNEL 320 default n 320 default n 321 321 322 config NET_FOU 322 config NET_FOU 323 tristate "IP: Foo (IP protocols) over 323 tristate "IP: Foo (IP protocols) over UDP" 324 select NET_UDP_TUNNEL 324 select NET_UDP_TUNNEL 325 help 325 help 326 Foo over UDP allows any IP protocol 326 Foo over UDP allows any IP protocol to be directly encapsulated 327 over UDP include tunnels (IPIP, GRE, 327 over UDP include tunnels (IPIP, GRE, SIT). By encapsulating in UDP 328 network mechanisms and optimizations 328 network mechanisms and optimizations for UDP (such as ECMP 329 and RSS) can be leveraged to provide 329 and RSS) can be leveraged to provide better service. 330 330 331 config NET_FOU_IP_TUNNELS 331 config NET_FOU_IP_TUNNELS 332 bool "IP: FOU encapsulation of IP tunn 332 bool "IP: FOU encapsulation of IP tunnels" 333 depends on NET_IPIP || NET_IPGRE || IP 333 depends on NET_IPIP || NET_IPGRE || IPV6_SIT 334 select NET_FOU 334 select NET_FOU 335 help 335 help 336 Allow configuration of FOU or GUE en 336 Allow configuration of FOU or GUE encapsulation for IP tunnels. 337 When this option is enabled IP tunne 337 When this option is enabled IP tunnels can be configured to use 338 FOU or GUE encapsulation. 338 FOU or GUE encapsulation. 339 339 340 config INET_AH 340 config INET_AH 341 tristate "IP: AH transformation" 341 tristate "IP: AH transformation" 342 select XFRM_AH 342 select XFRM_AH 343 help 343 help 344 Support for IPsec AH (Authentication 344 Support for IPsec AH (Authentication Header). 345 345 346 AH can be used with various authenti 346 AH can be used with various authentication algorithms. Besides 347 enabling AH support itself, this opt 347 enabling AH support itself, this option enables the generic 348 implementations of the algorithms th 348 implementations of the algorithms that RFC 8221 lists as MUST be 349 implemented. If you need any other 349 implemented. If you need any other algorithms, you'll need to enable 350 them in the crypto API. You should 350 them in the crypto API. You should also enable accelerated 351 implementations of any needed algori 351 implementations of any needed algorithms when available. 352 352 353 If unsure, say Y. 353 If unsure, say Y. 354 354 355 config INET_ESP 355 config INET_ESP 356 tristate "IP: ESP transformation" 356 tristate "IP: ESP transformation" 357 select XFRM_ESP 357 select XFRM_ESP 358 help 358 help 359 Support for IPsec ESP (Encapsulating 359 Support for IPsec ESP (Encapsulating Security Payload). 360 360 361 ESP can be used with various encrypt 361 ESP can be used with various encryption and authentication algorithms. 362 Besides enabling ESP support itself, 362 Besides enabling ESP support itself, this option enables the generic 363 implementations of the algorithms th 363 implementations of the algorithms that RFC 8221 lists as MUST be 364 implemented. If you need any other 364 implemented. If you need any other algorithms, you'll need to enable 365 them in the crypto API. You should 365 them in the crypto API. You should also enable accelerated 366 implementations of any needed algori 366 implementations of any needed algorithms when available. 367 367 368 If unsure, say Y. 368 If unsure, say Y. 369 369 370 config INET_ESP_OFFLOAD 370 config INET_ESP_OFFLOAD 371 tristate "IP: ESP transformation offlo 371 tristate "IP: ESP transformation offload" 372 depends on INET_ESP 372 depends on INET_ESP 373 select XFRM_OFFLOAD 373 select XFRM_OFFLOAD 374 default n 374 default n 375 help 375 help 376 Support for ESP transformation offlo 376 Support for ESP transformation offload. This makes sense 377 only if this system really does IPse 377 only if this system really does IPsec and want to do it 378 with high throughput. A typical desk 378 with high throughput. A typical desktop system does not 379 need it, even if it does IPsec. 379 need it, even if it does IPsec. 380 380 381 If unsure, say N. 381 If unsure, say N. 382 382 383 config INET_ESPINTCP 383 config INET_ESPINTCP 384 bool "IP: ESP in TCP encapsulation (RF 384 bool "IP: ESP in TCP encapsulation (RFC 8229)" 385 depends on XFRM && INET_ESP 385 depends on XFRM && INET_ESP 386 select STREAM_PARSER 386 select STREAM_PARSER 387 select NET_SOCK_MSG 387 select NET_SOCK_MSG 388 select XFRM_ESPINTCP 388 select XFRM_ESPINTCP 389 help 389 help 390 Support for RFC 8229 encapsulation o 390 Support for RFC 8229 encapsulation of ESP and IKE over 391 TCP/IPv4 sockets. 391 TCP/IPv4 sockets. 392 392 393 If unsure, say N. 393 If unsure, say N. 394 394 395 config INET_IPCOMP 395 config INET_IPCOMP 396 tristate "IP: IPComp transformation" 396 tristate "IP: IPComp transformation" 397 select INET_XFRM_TUNNEL 397 select INET_XFRM_TUNNEL 398 select XFRM_IPCOMP 398 select XFRM_IPCOMP 399 help 399 help 400 Support for IP Payload Compression P 400 Support for IP Payload Compression Protocol (IPComp) (RFC3173), 401 typically needed for IPsec. 401 typically needed for IPsec. 402 402 403 If unsure, say Y. 403 If unsure, say Y. 404 404 405 config INET_TABLE_PERTURB_ORDER 405 config INET_TABLE_PERTURB_ORDER 406 int "INET: Source port perturbation ta 406 int "INET: Source port perturbation table size (as power of 2)" if EXPERT 407 default 16 407 default 16 408 help 408 help 409 Source port perturbation table size 409 Source port perturbation table size (as power of 2) for 410 RFC 6056 3.3.4. Algorithm 4: Double 410 RFC 6056 3.3.4. Algorithm 4: Double-Hash Port Selection Algorithm. 411 411 412 The default is almost always what yo 412 The default is almost always what you want. 413 Only change this if you know what yo 413 Only change this if you know what you are doing. 414 414 415 config INET_XFRM_TUNNEL 415 config INET_XFRM_TUNNEL 416 tristate 416 tristate 417 select INET_TUNNEL 417 select INET_TUNNEL 418 default n 418 default n 419 419 420 config INET_TUNNEL 420 config INET_TUNNEL 421 tristate 421 tristate 422 default n 422 default n 423 423 424 config INET_DIAG 424 config INET_DIAG 425 tristate "INET: socket monitoring inte 425 tristate "INET: socket monitoring interface" 426 default y 426 default y 427 help 427 help 428 Support for INET (TCP, DCCP, etc) so 428 Support for INET (TCP, DCCP, etc) socket monitoring interface used by 429 native Linux tools such as ss. ss is 429 native Linux tools such as ss. ss is included in iproute2, currently 430 downloadable at: 430 downloadable at: 431 431 432 http://www.linuxfoundation.org/col 432 http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2 433 433 434 If unsure, say Y. 434 If unsure, say Y. 435 435 436 config INET_TCP_DIAG 436 config INET_TCP_DIAG 437 depends on INET_DIAG 437 depends on INET_DIAG 438 def_tristate INET_DIAG 438 def_tristate INET_DIAG 439 439 440 config INET_UDP_DIAG 440 config INET_UDP_DIAG 441 tristate "UDP: socket monitoring inter 441 tristate "UDP: socket monitoring interface" 442 depends on INET_DIAG && (IPV6 || IPV6= 442 depends on INET_DIAG && (IPV6 || IPV6=n) 443 default n 443 default n 444 help 444 help 445 Support for UDP socket monitoring in 445 Support for UDP socket monitoring interface used by the ss tool. 446 If unsure, say Y. 446 If unsure, say Y. 447 447 448 config INET_RAW_DIAG 448 config INET_RAW_DIAG 449 tristate "RAW: socket monitoring inter 449 tristate "RAW: socket monitoring interface" 450 depends on INET_DIAG && (IPV6 || IPV6= 450 depends on INET_DIAG && (IPV6 || IPV6=n) 451 default n 451 default n 452 help 452 help 453 Support for RAW socket monitoring in 453 Support for RAW socket monitoring interface used by the ss tool. 454 If unsure, say Y. 454 If unsure, say Y. 455 455 456 config INET_DIAG_DESTROY 456 config INET_DIAG_DESTROY 457 bool "INET: allow privileged process t 457 bool "INET: allow privileged process to administratively close sockets" 458 depends on INET_DIAG 458 depends on INET_DIAG 459 default n 459 default n 460 help 460 help 461 Provides a SOCK_DESTROY operation th 461 Provides a SOCK_DESTROY operation that allows privileged processes 462 (e.g., a connection manager or a net 462 (e.g., a connection manager or a network administration tool such as 463 ss) to close sockets opened by other 463 ss) to close sockets opened by other processes. Closing a socket in 464 this way interrupts any blocking rea 464 this way interrupts any blocking read/write/connect operations on 465 the socket and causes future socket 465 the socket and causes future socket calls to behave as if the socket 466 had been disconnected. 466 had been disconnected. 467 If unsure, say N. 467 If unsure, say N. 468 468 469 menuconfig TCP_CONG_ADVANCED 469 menuconfig TCP_CONG_ADVANCED 470 bool "TCP: advanced congestion control 470 bool "TCP: advanced congestion control" 471 help 471 help 472 Support for selection of various TCP 472 Support for selection of various TCP congestion control 473 modules. 473 modules. 474 474 475 Nearly all users can safely say no h 475 Nearly all users can safely say no here, and a safe default 476 selection will be made (CUBIC with n 476 selection will be made (CUBIC with new Reno as a fallback). 477 477 478 If unsure, say N. 478 If unsure, say N. 479 479 480 if TCP_CONG_ADVANCED 480 if TCP_CONG_ADVANCED 481 481 482 config TCP_CONG_BIC 482 config TCP_CONG_BIC 483 tristate "Binary Increase Congestion ( 483 tristate "Binary Increase Congestion (BIC) control" 484 default m 484 default m 485 help 485 help 486 BIC-TCP is a sender-side only change 486 BIC-TCP is a sender-side only change that ensures a linear RTT 487 fairness under large windows while o 487 fairness under large windows while offering both scalability and 488 bounded TCP-friendliness. The protoc 488 bounded TCP-friendliness. The protocol combines two schemes 489 called additive increase and binary 489 called additive increase and binary search increase. When the 490 congestion window is large, additive 490 congestion window is large, additive increase with a large 491 increment ensures linear RTT fairnes 491 increment ensures linear RTT fairness as well as good 492 scalability. Under small congestion 492 scalability. Under small congestion windows, binary search 493 increase provides TCP friendliness. 493 increase provides TCP friendliness. 494 See http://www.csc.ncsu.edu/faculty/ 494 See http://www.csc.ncsu.edu/faculty/rhee/export/bitcp/ 495 495 496 config TCP_CONG_CUBIC 496 config TCP_CONG_CUBIC 497 tristate "CUBIC TCP" 497 tristate "CUBIC TCP" 498 default y 498 default y 499 help 499 help 500 This is version 2.0 of BIC-TCP which 500 This is version 2.0 of BIC-TCP which uses a cubic growth function 501 among other techniques. 501 among other techniques. 502 See http://www.csc.ncsu.edu/faculty/ 502 See http://www.csc.ncsu.edu/faculty/rhee/export/bitcp/cubic-paper.pdf 503 503 504 config TCP_CONG_WESTWOOD 504 config TCP_CONG_WESTWOOD 505 tristate "TCP Westwood+" 505 tristate "TCP Westwood+" 506 default m 506 default m 507 help 507 help 508 TCP Westwood+ is a sender-side only 508 TCP Westwood+ is a sender-side only modification of the TCP Reno 509 protocol stack that optimizes the pe 509 protocol stack that optimizes the performance of TCP congestion 510 control. It is based on end-to-end b 510 control. It is based on end-to-end bandwidth estimation to set 511 congestion window and slow start thr 511 congestion window and slow start threshold after a congestion 512 episode. Using this estimation, TCP 512 episode. Using this estimation, TCP Westwood+ adaptively sets a 513 slow start threshold and a congestio 513 slow start threshold and a congestion window which takes into 514 account the bandwidth used at the t 514 account the bandwidth used at the time congestion is experienced. 515 TCP Westwood+ significantly increase 515 TCP Westwood+ significantly increases fairness wrt TCP Reno in 516 wired networks and throughput over w 516 wired networks and throughput over wireless links. 517 517 518 config TCP_CONG_HTCP 518 config TCP_CONG_HTCP 519 tristate "H-TCP" 519 tristate "H-TCP" 520 default m 520 default m 521 help 521 help 522 H-TCP is a send-side only modificati 522 H-TCP is a send-side only modifications of the TCP Reno 523 protocol stack that optimizes the pe 523 protocol stack that optimizes the performance of TCP 524 congestion control for high speed ne 524 congestion control for high speed network links. It uses a 525 modeswitch to change the alpha and b 525 modeswitch to change the alpha and beta parameters of TCP Reno 526 based on network conditions and in a 526 based on network conditions and in a way so as to be fair with 527 other Reno and H-TCP flows. 527 other Reno and H-TCP flows. 528 528 529 config TCP_CONG_HSTCP 529 config TCP_CONG_HSTCP 530 tristate "High Speed TCP" 530 tristate "High Speed TCP" 531 default n 531 default n 532 help 532 help 533 Sally Floyd's High Speed TCP (RFC 36 533 Sally Floyd's High Speed TCP (RFC 3649) congestion control. 534 A modification to TCP's congestion c 534 A modification to TCP's congestion control mechanism for use 535 with large congestion windows. A tab 535 with large congestion windows. A table indicates how much to 536 increase the congestion window by wh 536 increase the congestion window by when an ACK is received. 537 For more detail see https://www.icir 537 For more detail see https://www.icir.org/floyd/hstcp.html 538 538 539 config TCP_CONG_HYBLA 539 config TCP_CONG_HYBLA 540 tristate "TCP-Hybla congestion control 540 tristate "TCP-Hybla congestion control algorithm" 541 default n 541 default n 542 help 542 help 543 TCP-Hybla is a sender-side only chan 543 TCP-Hybla is a sender-side only change that eliminates penalization of 544 long-RTT, large-bandwidth connection 544 long-RTT, large-bandwidth connections, like when satellite legs are 545 involved, especially when sharing a 545 involved, especially when sharing a common bottleneck with normal 546 terrestrial connections. 546 terrestrial connections. 547 547 548 config TCP_CONG_VEGAS 548 config TCP_CONG_VEGAS 549 tristate "TCP Vegas" 549 tristate "TCP Vegas" 550 default n 550 default n 551 help 551 help 552 TCP Vegas is a sender-side only chan 552 TCP Vegas is a sender-side only change to TCP that anticipates 553 the onset of congestion by estimatin 553 the onset of congestion by estimating the bandwidth. TCP Vegas 554 adjusts the sending rate by modifyin 554 adjusts the sending rate by modifying the congestion 555 window. TCP Vegas should provide les 555 window. TCP Vegas should provide less packet loss, but it is 556 not as aggressive as TCP Reno. 556 not as aggressive as TCP Reno. 557 557 558 config TCP_CONG_NV 558 config TCP_CONG_NV 559 tristate "TCP NV" 559 tristate "TCP NV" 560 default n 560 default n 561 help 561 help 562 TCP NV is a follow up to TCP Vegas. 562 TCP NV is a follow up to TCP Vegas. It has been modified to deal with 563 10G networks, measurement noise intr 563 10G networks, measurement noise introduced by LRO, GRO and interrupt 564 coalescence. In addition, it will de 564 coalescence. In addition, it will decrease its cwnd multiplicatively 565 instead of linearly. 565 instead of linearly. 566 566 567 Note that in general congestion avoi 567 Note that in general congestion avoidance (cwnd decreased when # packets 568 queued grows) cannot coexist with co 568 queued grows) cannot coexist with congestion control (cwnd decreased only 569 when there is packet loss) due to fa 569 when there is packet loss) due to fairness issues. One scenario when they 570 can coexist safely is when the CA fl 570 can coexist safely is when the CA flows have RTTs << CC flows RTTs. 571 571 572 For further details see http://www.b 572 For further details see http://www.brakmo.org/networking/tcp-nv/ 573 573 574 config TCP_CONG_SCALABLE 574 config TCP_CONG_SCALABLE 575 tristate "Scalable TCP" 575 tristate "Scalable TCP" 576 default n 576 default n 577 help 577 help 578 Scalable TCP is a sender-side only c 578 Scalable TCP is a sender-side only change to TCP which uses a 579 MIMD congestion control algorithm wh 579 MIMD congestion control algorithm which has some nice scaling 580 properties, though is known to have 580 properties, though is known to have fairness issues. 581 See http://www.deneholme.net/tom/sca 581 See http://www.deneholme.net/tom/scalable/ 582 582 583 config TCP_CONG_LP 583 config TCP_CONG_LP 584 tristate "TCP Low Priority" 584 tristate "TCP Low Priority" 585 default n 585 default n 586 help 586 help 587 TCP Low Priority (TCP-LP), a distrib 587 TCP Low Priority (TCP-LP), a distributed algorithm whose goal is 588 to utilize only the excess network b 588 to utilize only the excess network bandwidth as compared to the 589 ``fair share`` of bandwidth as targe 589 ``fair share`` of bandwidth as targeted by TCP. 590 See http://www-ece.rice.edu/networks 590 See http://www-ece.rice.edu/networks/TCP-LP/ 591 591 592 config TCP_CONG_VENO 592 config TCP_CONG_VENO 593 tristate "TCP Veno" 593 tristate "TCP Veno" 594 default n 594 default n 595 help 595 help 596 TCP Veno is a sender-side only enhan 596 TCP Veno is a sender-side only enhancement of TCP to obtain better 597 throughput over wireless networks. T 597 throughput over wireless networks. TCP Veno makes use of state 598 distinguishing to circumvent the dif 598 distinguishing to circumvent the difficult judgment of the packet loss 599 type. TCP Veno cuts down less conges 599 type. TCP Veno cuts down less congestion window in response to random 600 loss packets. 600 loss packets. 601 See <http://ieeexplore.ieee.org/xpl/ 601 See <http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1177186> 602 602 603 config TCP_CONG_YEAH 603 config TCP_CONG_YEAH 604 tristate "YeAH TCP" 604 tristate "YeAH TCP" 605 select TCP_CONG_VEGAS 605 select TCP_CONG_VEGAS 606 default n 606 default n 607 help 607 help 608 YeAH-TCP is a sender-side high-speed 608 YeAH-TCP is a sender-side high-speed enabled TCP congestion control 609 algorithm, which uses a mixed loss/d 609 algorithm, which uses a mixed loss/delay approach to compute the 610 congestion window. It's design goals 610 congestion window. It's design goals target high efficiency, 611 internal, RTT and Reno fairness, res 611 internal, RTT and Reno fairness, resilience to link loss while 612 keeping network elements load as low 612 keeping network elements load as low as possible. 613 613 614 For further details look here: 614 For further details look here: 615 http://wil.cs.caltech.edu/pfldnet2 615 http://wil.cs.caltech.edu/pfldnet2007/paper/YeAH_TCP.pdf 616 616 617 config TCP_CONG_ILLINOIS 617 config TCP_CONG_ILLINOIS 618 tristate "TCP Illinois" 618 tristate "TCP Illinois" 619 default n 619 default n 620 help 620 help 621 TCP-Illinois is a sender-side modifi 621 TCP-Illinois is a sender-side modification of TCP Reno for 622 high speed long delay links. It uses 622 high speed long delay links. It uses round-trip-time to 623 adjust the alpha and beta parameters 623 adjust the alpha and beta parameters to achieve a higher average 624 throughput and maintain fairness. 624 throughput and maintain fairness. 625 625 626 For further details see: 626 For further details see: 627 http://www.ews.uiuc.edu/~shaoliu/t 627 http://www.ews.uiuc.edu/~shaoliu/tcpillinois/index.html 628 628 629 config TCP_CONG_DCTCP 629 config TCP_CONG_DCTCP 630 tristate "DataCenter TCP (DCTCP)" 630 tristate "DataCenter TCP (DCTCP)" 631 default n 631 default n 632 help 632 help 633 DCTCP leverages Explicit Congestion 633 DCTCP leverages Explicit Congestion Notification (ECN) in the network to 634 provide multi-bit feedback to the en 634 provide multi-bit feedback to the end hosts. It is designed to provide: 635 635 636 - High burst tolerance (incast due t 636 - High burst tolerance (incast due to partition/aggregate), 637 - Low latency (short flows, queries) 637 - Low latency (short flows, queries), 638 - High throughput (continuous data u 638 - High throughput (continuous data updates, large file transfers) with 639 commodity, shallow-buffered switch 639 commodity, shallow-buffered switches. 640 640 641 All switches in the data center netw 641 All switches in the data center network running DCTCP must support 642 ECN marking and be configured for ma 642 ECN marking and be configured for marking when reaching defined switch 643 buffer thresholds. The default ECN m 643 buffer thresholds. The default ECN marking threshold heuristic for 644 DCTCP on switches is 20 packets (30K 644 DCTCP on switches is 20 packets (30KB) at 1Gbps, and 65 packets 645 (~100KB) at 10Gbps, but might need f 645 (~100KB) at 10Gbps, but might need further careful tweaking. 646 646 647 For further details see: 647 For further details see: 648 http://simula.stanford.edu/~alizad 648 http://simula.stanford.edu/~alizade/Site/DCTCP_files/dctcp-final.pdf 649 649 650 config TCP_CONG_CDG 650 config TCP_CONG_CDG 651 tristate "CAIA Delay-Gradient (CDG)" 651 tristate "CAIA Delay-Gradient (CDG)" 652 default n 652 default n 653 help 653 help 654 CAIA Delay-Gradient (CDG) is a TCP c 654 CAIA Delay-Gradient (CDG) is a TCP congestion control that modifies 655 the TCP sender in order to: 655 the TCP sender in order to: 656 656 657 o Use the delay gradient as a conges 657 o Use the delay gradient as a congestion signal. 658 o Back off with an average probabili 658 o Back off with an average probability that is independent of the RTT. 659 o Coexist with flows that use loss-b 659 o Coexist with flows that use loss-based congestion control. 660 o Tolerate packet loss unrelated to 660 o Tolerate packet loss unrelated to congestion. 661 661 662 For further details see: 662 For further details see: 663 D.A. Hayes and G. Armitage. "Revis 663 D.A. Hayes and G. Armitage. "Revisiting TCP congestion control using 664 delay gradients." In Networking 20 !! 664 delay gradients." In Networking 2011. Preprint: http://goo.gl/No3vdg 665 http://caia.swin.edu.au/cv/dahayes << 666 665 667 config TCP_CONG_BBR 666 config TCP_CONG_BBR 668 tristate "BBR TCP" 667 tristate "BBR TCP" 669 default n 668 default n 670 help 669 help 671 670 672 BBR (Bottleneck Bandwidth and RTT) T 671 BBR (Bottleneck Bandwidth and RTT) TCP congestion control aims to 673 maximize network utilization and min 672 maximize network utilization and minimize queues. It builds an explicit 674 model of the bottleneck delivery rat 673 model of the bottleneck delivery rate and path round-trip propagation 675 delay. It tolerates packet loss and 674 delay. It tolerates packet loss and delay unrelated to congestion. It 676 can operate over LAN, WAN, cellular, 675 can operate over LAN, WAN, cellular, wifi, or cable modem links. It can 677 coexist with flows that use loss-bas 676 coexist with flows that use loss-based congestion control, and can 678 operate with shallow buffers, deep b 677 operate with shallow buffers, deep buffers, bufferbloat, policers, or 679 AQM schemes that do not provide a de 678 AQM schemes that do not provide a delay signal. It requires the fq 680 ("Fair Queue") pacing packet schedul 679 ("Fair Queue") pacing packet scheduler. 681 680 682 choice 681 choice 683 prompt "Default TCP congestion control 682 prompt "Default TCP congestion control" 684 default DEFAULT_CUBIC 683 default DEFAULT_CUBIC 685 help 684 help 686 Select the TCP congestion control th 685 Select the TCP congestion control that will be used by default 687 for all connections. 686 for all connections. 688 687 689 config DEFAULT_BIC 688 config DEFAULT_BIC 690 bool "Bic" if TCP_CONG_BIC=y 689 bool "Bic" if TCP_CONG_BIC=y 691 690 692 config DEFAULT_CUBIC 691 config DEFAULT_CUBIC 693 bool "Cubic" if TCP_CONG_CUBIC 692 bool "Cubic" if TCP_CONG_CUBIC=y 694 693 695 config DEFAULT_HTCP 694 config DEFAULT_HTCP 696 bool "Htcp" if TCP_CONG_HTCP=y 695 bool "Htcp" if TCP_CONG_HTCP=y 697 696 698 config DEFAULT_HYBLA 697 config DEFAULT_HYBLA 699 bool "Hybla" if TCP_CONG_HYBLA 698 bool "Hybla" if TCP_CONG_HYBLA=y 700 699 701 config DEFAULT_VEGAS 700 config DEFAULT_VEGAS 702 bool "Vegas" if TCP_CONG_VEGAS 701 bool "Vegas" if TCP_CONG_VEGAS=y 703 702 704 config DEFAULT_VENO 703 config DEFAULT_VENO 705 bool "Veno" if TCP_CONG_VENO=y 704 bool "Veno" if TCP_CONG_VENO=y 706 705 707 config DEFAULT_WESTWOOD 706 config DEFAULT_WESTWOOD 708 bool "Westwood" if TCP_CONG_WE 707 bool "Westwood" if TCP_CONG_WESTWOOD=y 709 708 710 config DEFAULT_DCTCP 709 config DEFAULT_DCTCP 711 bool "DCTCP" if TCP_CONG_DCTCP 710 bool "DCTCP" if TCP_CONG_DCTCP=y 712 711 713 config DEFAULT_CDG 712 config DEFAULT_CDG 714 bool "CDG" if TCP_CONG_CDG=y 713 bool "CDG" if TCP_CONG_CDG=y 715 714 716 config DEFAULT_BBR 715 config DEFAULT_BBR 717 bool "BBR" if TCP_CONG_BBR=y 716 bool "BBR" if TCP_CONG_BBR=y 718 717 719 config DEFAULT_RENO 718 config DEFAULT_RENO 720 bool "Reno" 719 bool "Reno" 721 endchoice 720 endchoice 722 721 723 endif 722 endif 724 723 725 config TCP_CONG_CUBIC 724 config TCP_CONG_CUBIC 726 tristate 725 tristate 727 depends on !TCP_CONG_ADVANCED 726 depends on !TCP_CONG_ADVANCED 728 default y 727 default y 729 728 730 config DEFAULT_TCP_CONG 729 config DEFAULT_TCP_CONG 731 string 730 string 732 default "bic" if DEFAULT_BIC 731 default "bic" if DEFAULT_BIC 733 default "cubic" if DEFAULT_CUBIC 732 default "cubic" if DEFAULT_CUBIC 734 default "htcp" if DEFAULT_HTCP 733 default "htcp" if DEFAULT_HTCP 735 default "hybla" if DEFAULT_HYBLA 734 default "hybla" if DEFAULT_HYBLA 736 default "vegas" if DEFAULT_VEGAS 735 default "vegas" if DEFAULT_VEGAS 737 default "westwood" if DEFAULT_WESTWOOD 736 default "westwood" if DEFAULT_WESTWOOD 738 default "veno" if DEFAULT_VENO 737 default "veno" if DEFAULT_VENO 739 default "reno" if DEFAULT_RENO 738 default "reno" if DEFAULT_RENO 740 default "dctcp" if DEFAULT_DCTCP 739 default "dctcp" if DEFAULT_DCTCP 741 default "cdg" if DEFAULT_CDG 740 default "cdg" if DEFAULT_CDG 742 default "bbr" if DEFAULT_BBR 741 default "bbr" if DEFAULT_BBR 743 default "cubic" 742 default "cubic" 744 743 745 config TCP_SIGPOOL << 746 tristate << 747 << 748 config TCP_AO << 749 bool "TCP: Authentication Option (RFC5 << 750 select CRYPTO << 751 select TCP_SIGPOOL << 752 depends on 64BIT && IPV6 != m # seq-nu << 753 help << 754 TCP-AO specifies the use of stronger << 755 protects against replays for long-li << 756 provides more details on the associa << 757 connections than TCP MD5 (See RFC592 << 758 << 759 If unsure, say N. << 760 << 761 config TCP_MD5SIG 744 config TCP_MD5SIG 762 bool "TCP: MD5 Signature Option suppor 745 bool "TCP: MD5 Signature Option support (RFC2385)" 763 select CRYPTO 746 select CRYPTO 764 select CRYPTO_MD5 747 select CRYPTO_MD5 765 select TCP_SIGPOOL << 766 help 748 help 767 RFC2385 specifies a method of giving 749 RFC2385 specifies a method of giving MD5 protection to TCP sessions. 768 Its main (only?) use is to protect B 750 Its main (only?) use is to protect BGP sessions between core routers 769 on the Internet. 751 on the Internet. 770 752 771 If unsure, say N. 753 If unsure, say N.
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