The SIP protocol is commonly used for IP telephone communications. Unfortunately it’s notorious for having issues with NAT traversal. Even some major vendors can’t seem to get it right. [Stephen] had ...
To "prove" that ALG is off, target a host on a public IP with your SIP client, and run a packet capture there. In the "Contact: <sip:[email protected]>;expires=3600" line of the registration ...
Whether it's for firewalls or Virtual Private Networks, we're seeing an increasing emphasis on VoIP Security. The point was hammered home today by a look at the Security Appliances winner in ...
Das Problem dabei ist, dass es dabei immer wieder dazu kommt, dass SIP-Pakete falsch umgeändert werden oder dass eine vorher erstellte UDP-Verbindung plötzlich ins Leere führt. Ein Symptom dafür ist ...
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