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 ...
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 ...
I've never needed to do this with a network that had an ASA, but have done it with a Sonicwall. When setting up a FreePBX server behind a Sonicwall I needed to do the following: - Turn on Consistent ...
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 ...
A bug in a Realtek software development kit (SDK) means any third party devices with software that uses the SDK could inherit a vulnerability in their Session Initiation Protocol (SIP) implementations ...
Wer glaubt, dass seine Geräte hinter einer Firewall vor dem Zugriff aus dem Internet sicher sind, der wird spätestens seit der Enthüllung von NAT-Slipstreaming-Angriffen eines Besseren belehrt. Laut ...
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