what are the numbers in bracket against chain name in iptable? [duplicate]

Solution 1:

A chain specification looks like : chain-name chain-policy [packet-counter:byte-counter]. The chain-name may be for example PREROUTING, the policy is described previously and can for example be ACCEPT. Finally the packet-counter and byte-counters are the same counters as in the output from iptables -L -v.

http://www.faqs.org/docs/iptables/iptables-save.html