Don't understand [0:0] iptable syntax

Posted by artaxerxe on Server Fault See other posts from Server Fault or by artaxerxe
Published on 2012-03-27T10:43:37Z Indexed on 2012/03/27 11:31 UTC
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I'm struggling with some iptables rules. I'm a newbie in iptables. I found some resources where I get the following command related to iptables. This is stored in a file that will be executed.

[0:0] -A PREROUTING -s 10.1.0.0/24 -p tcp -m tcp --dport 81 -j DNAT --to-destination 10.1.0.6:3128

Can anybody explain me what does [0:0] mean? Also, some link related to this in iptables are welcome.

Thanks in advance!

P.S. If you need more rules, just let me know.

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