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 ...

Guidance has been produced by NICC for the use and secure implementation of SIP (Session Initiation Protocol) ALG (Application Layer Gateways). NICC is the the technical forum for the UK ...

The Third Generation Partnership Project (3GPP), which is responsible for the standardization of the third-generation mobile networks, has designated the session initiation protocol (SIP) as the call ...

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 ...

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 ...

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 ...

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 ...