What do these numbers mean in the output of iptable-save?

Question

In the output of iptables-save

# Generated by iptables-save v1.3.8 on Sun Mar 14 19:42:45 2010
*filter
:INPUT ACCEPT [328764:37367248]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [324693:28884726]
COMMIT
# Completed on Sun Mar 14 19:42:45 2010

What do the numbers 328764:37367248 mean?

Answer 1

As explained here:

This contains a few comments starting with a # sign. Each table is marked like *<table-name>, for example *mangle. Then within each table we have the chain specifications and rules. A chain specification looks like : <chain-name> <chain-policy> [<packet-counter>:<byte-counter>].

So 328764 is the number of packets and 37367248 is the number of bytes.