Re: DNS discovery / FreeBSD Firewall

2006-07-02 Thread Olivier Nicole
   The questions is; How do I have the internal network machines
 get the DNS server settings from the Firewall?  The two scenarios I
 can think of are: that the Firewall also acts as a DHCP server and
 somehow set the DNS of the internal net machines to the Firewalls
 resolv.conf entries; or I can have the Firewall act as a DNS
 server/relay and forward the DNS requests.

If your ISP keep changing their DNS server I'd suggest another
solution: set your own DNS server, but on a machine different from the
firewall.

Just make sure that the filrewall let domain traffic (udp/53 and
tcp/53) go through. And configure the firewall to use your own DNS
server.

DNS server needs NO resources, an old PIII 500 will do the trick.

It is always a good choice to have the firewall be only a firewall and
nothing else. If you add DNS on your firewall and DNS has somore
vulnerabilities, your firewall would be comprimised...

Bests,

Olivier
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DNS discovery / FreeBSD Firewall

2006-06-30 Thread Mark Moellering
Hello,

I have a FreeBSD 6.1 firewall (pf) between my cable-modem and router, 
with an 
IP address set by DHCP.  My ISP recently changed their DNS server IP adresses 
which I have set manually on the computers on my home office network.  
The questions is; How do I have the internal network machines get the 
DNS 
server settings from the Firewall?  The two scenarios I can think of are: 
that the Firewall also acts as a DHCP server and somehow set the DNS of the 
internal net machines to the Firewalls resolv.conf entries; or I can have the 
Firewall act as a DNS server/relay and forward the DNS requests.  
Is one of these preferable or easier than the other?  Are there other 
ways to 
do this?  I feel there must be someone on this list who is doing the same 
thing and has a solution or can at least point me in the right direction.  
Any and all help is greatly appreciated.

Thanks in advance,

sincerely

Mark Moellering
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