dns woes

[David Banning]

I have had my dns server working fine in the past but now it seems
to be down and I can't locate the reason.

Here are some details;

# dig @127.0.0.1 mylocaldomain.com 

works, but 

# dig @ns1.3s1.com mylocaldomain.com

does not.

I have all IP addresses listed in named.conf;

        listen-on       {
                        192.168.1.1;
                        209.161.205.12;
                        127.0.0.1;
                        };


I also note that 

$ telnet ns1.3s1.com 53

show port 53 as closed, while

$ telnet 127.0.0.1 53

shows it as open

The other strange thing is that I get the startup error;

zone 0.0.127.IN-ADDR.ARPA/IN: loading master file master/localhost.rev: file not found

when in fact /etc/namedb/master/localhost.rev -does- exist.


any pointers would be helpful