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Mirror of https://git.netfilter.org/conntrack-tools
License: GNU General Public License v2.0
This project forked from distrotech/conntrack-tools
Mirror of https://git.netfilter.org/conntrack-tools
License: GNU General Public License v2.0
= nfct: command line tool to interact with the Connection Tracking System = This tool only supports the cttimeout infrastructure by now. However, the plan is that it will replace `conntrack' with a syntax that looks more similar to `ip' and `nftables' tools (in the long run!). == cttimeout: fine-grain timeout tuning for the Connection Tracking System == The `nfct' command line tool allows you to define custom timeout policies: # nfct timeout add custom-tcp-policy1 inet tcp established 100 You can also retrieve the existing timeout policies with: # nfct timeout list .tcp-policy = { .l3proto = 2, .l4proto = 6, .policy = { .SYN_SENT = 120, .SYN_RECV = 60, .ESTABLISHED = 100, .FIN_WAIT = 120, .CLOSE_WAIT = 60, .LAST_ACK = 30, .TIME_WAIT = 120, .CLOSE = 10, .SYN_SENT2 = 120, .RETRANS = 300, .UNACKNOWLEDGED = 300, }, }; Then, you can use the timeout policy with iptables: # iptables -I PREROUTING -t raw -s 1.1.1.1 -d 2.2.2.2 -p tcp \ -j CT --timeout custom-tcp-policy1 You can define policies for other protocols as well, eg: # nfct timeout add custom-udp-policy1 inet udp unreplied 10 replied 20 And attach them via iptables: # iptables -I PREROUTING -t raw -s 1.1.1.1 -d 2.2.2.2 -p udp \ -j CT --timeout custom-udp-policy1 == Compilation & Installation == This tool requires libmnl and libnetfilter_cttimeout. You also require nfnetlink_cttimeout support in the Linux kernel. If you obtain a working copy from git, you have to run: $ autoreconf -fi # this is the lingo that replaces old autogen.sh scripts $ ./configure --prefix=/usr $ make $ sudo make install -o- (c) 2012 by Pablo Neira Ayuso <[email protected]>
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