I have instaled an firewall on my server and if I try to connect to my DNS i can't connect even if i accept everithing on 53 port, before installing the firewall my dns was working OK,

I blocked all ports from 0 to 65535
and I opened potrs
TCP 22, 25, 53, 80, 110, 3306
UDP 25, 53, 123, 1370, 3010

what port should i open to work properly ???

seba

If you're running a DNS server behind the firewall, then you need ports 53 UDP and TCP open and forwarded to the DNS server. You also need to allow the responses back out.

Maybe you should clarify things a bit. Is "your DNS" on your own network (at home?), or is it someone elses' server that is providing DNS for you (i.e. a web hosting company, or domain registrar)?

If your own machine is acting as a DNS server, where is it on your network? Could you describe how your network is setup (e.g. DSL goes into dual-homed box, running iptables, inside NIC is connected to switch, all boxes on switch have RFC1918 addresses and are being NAT'd by firewall, etc...).

Can you post your firewall rules?

DNS is a tricky protocol to let through firewalls, this has to do with the way klients and servers communicate. The tricky part is that different clients/servers do it a litettle different.
This is a linkto a site trying tio describe to issue.
http://homepages.tesco.net/~J.deBoyn...all-holes.html