On Sat, 14 Jul 2012, cr...@freebsd.org wrote:
> http://www.freebsd.org/cgi/query-pr.cgi?pr=165939
> Description
> If user has tables used in /etc/ipfw.conf for example:
>
> table 1 add 64.6.108.239
>
> then firewall restart:
>
> /etc/rc.d/ipfw start
>
> fails with:
> Line 8: setsockopt(IP_FW_TABLE_ADD): File exists
> Firewall rules loaded.
>
> and incomplete ruleset is loaded. This is serious security problem.
>
> How-To-Repeat
> Fix
> in /etc/rc.firewall
>
> after ${fwcmd} -f flush
> you need to flush tables too with command
>
> ipfw table all flush
Yes, to such a ruleset you'd need to add 'table all flush' too.
ipfw flush specifically does not flush tables. I've long relied upon
that, using mostly static tables only reloaded from a file saved hourly
by cron, when $firewall_script finds tables are not loaded - ie at boot.
cheers, Ian
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