DNS issues; BIND is not responding to DNS requests

[Daniel15]

Hi guys,
I recently helped my friend set up cPanel on his CentOS 5 server, and will be eventually setting up a DNSOnly installation on another server. Whilst the actual installation went fine, BIND/named is non-functional, and is not returning a response to any DNS requests.

It is definitely running:

[root@web1 /]# netstat -tap | grep named
tcp 0 0 667919088.us.coreisp:domain *:* LISTEN 8492/named
tcp 0 0 web1.m-i.com.au:domain *:* LISTEN 8492/named
tcp 0 0 web1.m-i.com.au:rndc *:* LISTEN 8492/named

However, DNS lookups do not return anything:
On the server:

[root@web1 /]# dig @localhost m-i.com.au

; <<>> DiG 9.3.3rc2 <<>> @localhost m-i.com.au
; (1 server found)
;; global options: printcmd
;; connection timed out; no servers could be reached

From my PC:

daniel@daniel-laptop:~$ dig @66.79.190.87 m-i.com.au

; <<>> DiG 9.3.4 <<>> @66.79.190.87 m-i.com.au
; (1 server found)
;; global options: printcmd
;; connection timed out; no servers could be reached

Apart from the "sending notifies" messages, there are no BIND-related messages in /var/log/messages. No errors are encountered when I edit the DNS zones via WHM, and everything else seems to be working fine. BIND is not running in a chroot, as I have not got around to setting it up (cPanel is running inside a vserver, and I need to set up the chroot jail manually, because the vserver does not have permissions to run "mknod").

Any ideas?
Thanks