[gkhewitt]

I'd already checked the IP and forgot to add it in to the above post. Did a dig on the A records for my domain and they matched the ones in ifconfig on the linux box.

Just for the record, here are my iptables rules I'm running

# iptables -L
target     prot opt source               destination
ACCEPT     tcp  --  anywhere             anywhere            tcp multiport sports ssh,smtp,http,81,pop3,mysql,6616,10000
ACCEPT     all  --  anywhere             anywhere              {eth1}
ACCEPT     all  --  anywhere             anywhere              {lo}
ACCEPT     all  --  anywhere             anywhere            state RELATED,ESTABLISHED

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere             {from eth1}

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
DROP       tcp  --  anywhere             anywhere            tcp multiport dports 135,netbios-ns,netbios-dgm,netbios-ssn,microsoft-ds,printer,593
DROP       udp  --  anywhere             anywhere            multiport dports 135,netbios-ns,netbios-dgm,netbios-ssn,microsoft-ds,593 udp