[ale] Can't connect to port 53

[Jim Lynch]

I have a vps system running bind9 that I can telnet to port 53 from the 
local system but not from any other system (I tried three). See:

telnet localhost 53
Trying ::1...
Connected to localhost.
Escape character is '^]'.
}^]
telnet> quit

ifconfig | grep inet

inet addr:xxx.xxx.33.120  P-t-P:xxx.xxx.33.120 Bcast:xxx.xxx.33.120  
Mask:255.255.255.255

iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

(from another host)
  telnet xxx.xxx.33.120 53
Trying xxx.xxx.33.120...
telnet: Unable to connect to remote host: Connection refused

/etc/hosts.deny has some entries, but none for the host that can't 
connect and all the entries are for sshd anyway.

Is there something else that needs to be configured?  Selinux doesn't 
seem to be installed on this Centos 5.8 system.  No sestatus command, no 
/etc/selinux/config file, etc.

Thanks,
Jim.