dst_addr and subdomains

[Jeremy Chadwick]

On Tue, May 06, 2008 at 12:47:24PM +0300, Vitaliy Vladimirovich wrote:
> Hi!  
> ow can I specify dst_addr in my rule for all subdomains of server. E.g. example1.server.com, example2.server.com and so on.  
>   
> Something like this:  
>   
> pass out on sk0 inet proto tcp from $MY_LAN to *.example.org port www  

What you want is basically a layer 7 filter -- pf does not do that.

If all the machines within *.example.org are within a specific network
block (e.g. 20.30.40.0/24), then you can use that CIDR netblock instead
of *.example.org in your above example.  But you cannot use wildcards
for domains.  All hostnames given as a dst/src address will be resolved
first.

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |