[ S N O M 4 S N A T F I L T E R ]
packet. This setting does not only help you in making the packets shorter, it can also help you to keep some parts of the SIP message secret. For example, you might want to remove
4.3.15Codec Control
In many environments, you want to exclude codecs from being used, although both communication partners could agree on them. The “Allow only the following codecs” setting lists the codecs (separated by space) that you will allow. If you don’t set anything here, all codecs will be allowed. The codecs must be written in their SDP name, for example “ulaw”, “alaw”, “gsm”, “g729”, “g723”, etc.
This feature can be used, for example, to make sure that only
4.3.16Web Server Integration
The description of the web server integration follows in the next
chapter.
4.3.17CLIR Addresses
The SBC has the possibility to hide the identity of the caller (see description in the following chapter). For this feature it must decide when to hide the identity. If it hides the identity too early, the further processing in the data center will be difficult. Therefore it must make a decision when the request leaves the influence area of the data center.
When the request is sent to a UA that is handled by the NAT Filter, it does perform this step. However, when it is sent to a PSTN or
4.