diff options
Diffstat (limited to 'net/ipv4/Kconfig')
| -rw-r--r-- | net/ipv4/Kconfig | 52 |
1 files changed, 29 insertions, 23 deletions
diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig index 691268f3a359..b2cf91e4ccaa 100644 --- a/net/ipv4/Kconfig +++ b/net/ipv4/Kconfig @@ -35,7 +35,7 @@ config IP_ADVANCED_ROUTER at boot time after the /proc file system has been mounted. - If you turn on IP forwarding, you will also get the rp_filter, which + If you turn on IP forwarding, you should consider the rp_filter, which automatically rejects incoming packets if the routing table entry for their source address doesn't match the network interface they're arriving on. This has security advantages because it prevents the @@ -46,12 +46,16 @@ config IP_ADVANCED_ROUTER rp_filter on use: echo 1 > /proc/sys/net/ipv4/conf/<device>/rp_filter - or + and echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter + Note that some distributions enable it in startup scripts. + For details about rp_filter strict and loose mode read + <file:Documentation/networking/ip-sysctl.txt>. + If unsure, say N here. -choice +choice prompt "Choose IP: FIB lookup algorithm (choose FIB_HASH if unsure)" depends on IP_ADVANCED_ROUTER default ASK_IP_FIB_HASH @@ -59,27 +63,29 @@ choice config ASK_IP_FIB_HASH bool "FIB_HASH" ---help--- - Current FIB is very proven and good enough for most users. + Current FIB is very proven and good enough for most users. config IP_FIB_TRIE bool "FIB_TRIE" ---help--- - Use new experimental LC-trie as FIB lookup algorithm. - This improves lookup performance if you have a large - number of routes. - - LC-trie is a longest matching prefix lookup algorithm which - performs better than FIB_HASH for large routing tables. - But, it consumes more memory and is more complex. - - LC-trie is described in: - - IP-address lookup using LC-tries. Stefan Nilsson and Gunnar Karlsson - IEEE Journal on Selected Areas in Communications, 17(6):1083-1092, June 1999 - An experimental study of compression methods for dynamic tries - Stefan Nilsson and Matti Tikkanen. Algorithmica, 33(1):19-33, 2002. - http://www.nada.kth.se/~snilsson/public/papers/dyntrie2/ - + Use new experimental LC-trie as FIB lookup algorithm. + This improves lookup performance if you have a large + number of routes. + + LC-trie is a longest matching prefix lookup algorithm which + performs better than FIB_HASH for large routing tables. + But, it consumes more memory and is more complex. + + LC-trie is described in: + + IP-address lookup using LC-tries. Stefan Nilsson and Gunnar Karlsson + IEEE Journal on Selected Areas in Communications, 17(6):1083-1092, + June 1999 + + An experimental study of compression methods for dynamic tries + Stefan Nilsson and Matti Tikkanen. Algorithmica, 33(1):19-33, 2002. + http://www.nada.kth.se/~snilsson/public/papers/dyntrie2/ + endchoice config IP_FIB_HASH @@ -191,7 +197,7 @@ config IP_PNP_RARP <file:Documentation/filesystems/nfsroot.txt> for details. # not yet ready.. -# bool ' IP: ARP support' CONFIG_IP_PNP_ARP +# bool ' IP: ARP support' CONFIG_IP_PNP_ARP config NET_IPIP tristate "IP: tunneling" select INET_TUNNEL @@ -361,7 +367,7 @@ config INET_IPCOMP ---help--- Support for IP Payload Compression Protocol (IPComp) (RFC3173), typically needed for IPsec. - + If unsure, say Y. config INET_XFRM_TUNNEL @@ -415,7 +421,7 @@ config INET_DIAG Support for INET (TCP, DCCP, etc) socket monitoring interface used by native Linux tools such as ss. ss is included in iproute2, currently downloadable at <http://linux-net.osdl.org/index.php/Iproute2>. - + If unsure, say Y. config INET_TCP_DIAG |