User manual

http://www.DBL.com FXS+FXO Gateway Series

3.3.3.4. Firewall Traversal

In the advanced configuration of call settings, signal and media each has firewall

configuration.

3.3.3.4.1. H.323 Signaling NAT Traversal

There are four styles as follows:

A） None

Select None to turn off this feature.

B) Nat Citron

Citron is a dedicated firewall penetration agreement for GNUGK.

C) Port Transparent/DMZ

Port Transparent refers that put network port of the LAN into computer or inside of the

LAN. The actual servers allow external users enjoy the servers of internal server(FTP、

HTTP、Telnet ) .

Port Transparent includes the Gateway address and response server address. Gateway is

communications equipment that connect two different networks, response to the server is

standard service equipment that perform ECHO protocol.

D）Relay proxy

Relay proxy is a proprietary NAT traversal technology. It includes relay proxy server

address, port, username, and password.

Relay proxy makes encryption on the Gateway’s communication, this function need the

support of DBL. technology.