Hi people.

I replace my old (working) linux iptables firewall by IPCop to test in my network:

RED: ISP static IP (DNS Cache, DHCP)
GREEN: 192.168.2.0/24 - GW: 192.168.0.1 (PCs, Notebooks, etc)
ORANGE: 10.0.0.0/8 - GW: 10.0.0.1 (WEB, MAIL, DOMAIN NAME, FTP ... Servers)
DNS1 and DNS2 are from ISP for RED/ORANGE and RED IP for GREEN. (Work fine)

The problem is: From outside network can't resolve the domains on DNS server.

Any internet DNS Lookup tools show:

No name servers found for mydomain.com
or
FAILED. Parent servers not have A records for ns1.mydomain.com ns2.mydomain.com.

With my old linux firewall DNS lookup work fine.

I tried forward 53 port to ORANGE but IPCOP show the following message: External port reseved for ipcop use

NOTE:

How to forward to my DNS Server in DMZ with IPCOP?

Thanks in advance