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diff --git a/README.md b/README.md new file mode 100644 index 0000000..647f751 --- /dev/null +++ b/README.md @@ -0,0 +1,34 @@ +mtu1280 - emulates serving via a low MTU IPv6 tunnel +---------------------------------------------------- + +This program is will generate ICMPv6 "Packet Too Big" +responses with an MTU of 1280. mtu1280 will connect to +a netfilter_queue socket, listening for packets; and +respond to all packets sent to that queue. + +This is meant to be ran on a secondary IP for your host. +It is recommend that your primary IP is NOT used with +this technique in case of application failure. + +To deploy, compile build and install. Copy +in one of the init or init.d scripts, and make sure +it is set for auto-start for your OS. An actual reboot +is recommended. + +Once up and running, configure ip6tables to route +large packets destined to the desired IP to the netfilter queue. + +Example rule: + +``` +guest% sudo ip6tables-save | grep NFQ +-A INPUT -d 2001:470:1f04:d63::2/128 -m length --length 1281:65535 -j -NFQUEUE --queue-num 1280 +``` + + +LICENSE +------- +GPLv2, due to the duplicated code from Hararld Welte's +libnetfilter_queue-1.0.2/utils/nfqnl_test.c (included). + + |