Resetting the CountersLinux Network Administrators GuidePrevChapter 10. IP AccountingNextResetting the Counters
The IP accounting counters will overflow if you leave them long enough.
If they overflow, you will have difficulty determining the
value they actually represent. To avoid this problem, you should read
the accounting data periodically, record it, and then reset the counters
back to zero to begin collecting accounting information for the next
accounting interval.The ipfwadm and ipchains commands provide
you with a means of doing this quite simply:
# ipfwadm -A -z
or:
# ipchains -Z
or:
# iptables -Z
You can even combine the list and zeroing actions together to ensure that
no accounting data is lost in between:
# ipfwadm -A -l -z
or:
# ipchains -L -Z
or:
# iptables -L -Z -v
These commands will first list the accounting data and then immediately
zero the counters and begin counting again. If you are interested in
collecting and using this information regularly, you would probably want to
put this command into a script that recorded the output and stored it
somewhere, and execute the script periodically using the
cron command.PrevHomeNextUsing IP Accounting ResultsUpFlushing the Ruleset