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| author | Jan Engelhardt <jengelh@medozas.de> | 2008-02-14 03:02:55 +0100 |
|---|---|---|
| committer | Patrick McHardy <kaber@trash.net> | 2008-04-14 09:09:49 +0200 |
| commit | e24815d8a1b2755182fe983582a56fcc47153804 (patch) | |
| tree | 74521e49f0274dd0ff7831d9b71d25ef020820b5 /extensions/libxt_connlimit.man | |
| parent | 23545c2a7a31c68c1e49c7c901b632c2f1c59968 (diff) | |
Combine ipt and ip6t manpages
Combine ipt and ip6t manpages
Diffstat (limited to 'extensions/libxt_connlimit.man')
| -rw-r--r-- | extensions/libxt_connlimit.man | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/extensions/libxt_connlimit.man b/extensions/libxt_connlimit.man new file mode 100644 index 00000000..dd6a155b --- /dev/null +++ b/extensions/libxt_connlimit.man @@ -0,0 +1,27 @@ +Allows you to restrict the number of parallel connections to a server per +client IP address (or client address block). +.TP +[\fB!\fP] \fB--connlimit-above\fP \fIn\fP +Match if the number of existing connections is (not) above \fIn\fR. +.TP +\fB--connlimit-mask\fR \fIprefix_length\fR +Group hosts using the prefix length. For IPv4, this must be a number between +(including) 0 and 32. For IPv6, between 0 and 128. +.P +Examples: +.TP +# allow 2 telnet connections per client host +iptables -A INPUT -p tcp --syn --dport 23 -m connlimit --connlimit-above 2 -j REJECT +.TP +# you can also match the other way around: +iptables -A INPUT -p tcp --syn --dport 23 -m connlimit ! --connlimit-above 2 -j ACCEPT +.TP +# limit the number of parallel HTTP requests to 16 per class C sized \ +network (24 bit netmask) +iptables -p tcp --syn --dport 80 -m connlimit --connlimit-above 16 +--connlimit-mask 24 -j REJECT +.TP +# limit the number of parallel HTTP requests to 16 for the link local network \ +(ipv6) +ip6tables -p tcp --syn --dport 80 -s fe80::/64 -m connlimit --connlimit-above +16 --connlimit-mask 64 -j REJECT |