i run some scripts out of cron (and from rc.local on boot) to keep some tables 
in sync with DNS. the scripts are perl so i can use Net::DNS, but apart from 
that its been pretty robust and straightforward.

dlg

On 29 Sep 2014, at 11:44, Austin Gilbert <austin.gilb...@gmail.com> wrote:

> A problem that seems to come up over and over again with egress filtering 
> firewalls are sites that move IPs so the names need to be resolved 
> periodically and rules updated. 
> 
> I recently migrated to using pf and was wondering if anyone had suggestions 
> for how they tackle this problem.
> 
> I realize I could create cron jobs with scripts to do this, but was curious 
> if there was a better way.
> 
> I'd eventually like to track changes and log them as well.
> 
> Cheers,
> Austin

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