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Not able to write connlimit rule on linux iptables

Hi,

I am trying to write connlimit rule on iptables, get getting error as follows

#iptables -A INPUT -p tcp --syn --dport 80 -m connlimit --connlimit-above 5 -j REJECT --reject-with tcp-reset

Error : iptables: Unknown error 18446744073709551615

I can execute another rules like block perticular ip address to tcp port.

OS Version : CentOS release 5.8 (Final)
iptables Version : iptables v1.3.5
Kernel : 2.6.18-028stab101.1 #1 SMP Sun Jun 24 19:50:48 MSD 2012 x86_64 x86_64 x86_64 GNU/Linux

Thanks
Suresh

Quote:

Originally Posted by suresh.k (Post 4942547)

Kernel : 2.6.18-028stab101.1 #1 SMP Sun Jun 24 19:50:48 MSD 2012 x86_64 x86_64 x86_64 GNU/Linux

See the OpenVZ FAQ about iptables, modules and errors?

Quote:

Originally Posted by unSpawn (Post 4942793)

See the OpenVZ FAQ about iptables, modules and errors?

where i can find this?

The OpenVZ(.org) site most likely?