Zyxel ZyWALL USG 300 [95/185] Zywall usg support notes

ZyWALL USG Support Notes

3.2.1.2. Configuration Steps

You just need to enable SIP ALG on the USG ZyWALL to make this scenario work.

Go to Configuration > Network > ALG, enable SIP ALG, and also please make sure

to enable SIP Transformations.

After this setting is done, register all the clients to the Internet SIP server, then all the

clients can call each other, no matter they‟re in the local network, or in the Internet.

3.2.2. SIP Server on the Local Network

3.2.2.1. Application Scenario

In the scenario below, the SIP server is on the local network. There‟re SIP clients both

in the USG local network, and on the internet side. All the clients are registered to the

SIP server. We want all the clients can call each other:

The local clients can call out to the clients on the Internet.

The Internet clients can call in the local clients.

The Internet clients can call each other.

The local clients can call each other.