Thanks Mike... I've turned on 53/tcp (as well as 53/udp) as you suggest and will force 
a reload to test.  I still have a problem with lookups from the internet, as in the 
following tcpdump extract:

- > justatest.com.domain:  12+ A? linuxdoc.org. (30)
05:53:27.724911 justatest.com > ppp-233-153.24-151.libero.it: icmp: justatest.com udp 
port domain unreachable [tos 0xc0] 

At times tcpdump gives the port number (usually a 3xxx number).  However it changes 
each time the named process is restarted.

Again, if I open up the firewall everything is ok.  I added to the input chain to 
allow all icmp packets through but it didn't help any.  

Any further guidance is greatly appreciated,
/j-p.




> For zone transfers, you need to open up port 53/tcp in your firewall.  
> 53/udp is strictly for lookups.


> > After upgrading from rh7.0 to 7.3, I've found that Bind doesn't work for zone 
>updates (I'm using a hidden primary nameserver which refreshes secondary.com 
>nameservers) nor the dig command from the internet even though I had allowed incoming 
>traffic to port 53 (I'm new to ipchains too).  All outbound traffic is accepted.
> > 
> > Running tcpdump, I kept getting an error "UDP port domain unreachable".  It was 
>only when I completely turned off ipchains (eek!) that everything cleared up and Bind 
>worked again.



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