Issue with remote client connections

[Kevin Darcy]

John MacKenzie wrote:

>Hi there, 
>
>I've tried searching google and newgroups but couldn't find anything
>similar to my issue, hopefully someone here can help. 
>
>
>
> [root at samsara root]# named -v
>BIND 9.2.2-P3
>
>Bind is not responding to requests from external hosts. 
>
>IPTABLES has port 53 open, I can connect to the interface port 53 from
>local machine with no issues, however a remote client times out.
>
>I can telnet to port 53 from remote client and port appears open.
>
>Bind is listening to both my external IP address and loopback. 
>
>
>When I go from a home pc, anmd nslookup , server <my hostname> 
>
>And lookup a record from my own master Zone. 
>
>I get request timed out messages.
>
Double-check IPTABLES. TCP/53 *and* UDP/53 as inbound destination and/or 
outbound source.

nslookup sucks. Use a real lookup tool, e.g. "host" or "dig", not 
"nslookup". What may be tripping you up with nslookup is its stupid 
reverse-lookup dependency, i.e. if it can't do a reverse-lookup of its 
intended nameserver's IP, then it fails without doing the lookup you 
requested.

At the very least, if you're stuck with using nslookup, use the -debug 
flag so you can have some clue as to what is failing and how.

- Kevin