VoIP

Check your DHCP server for option 156In my case it was a leftover from a previous, onsite VoIP systemSome of the old Phones were still in use so i needed…

Disabling SIP ALG see here https://voipdocs.io/en/articles/316-disabling-sip-alg-on-a-fortigate-firewall

FYI: an OpenVAS scan will reboot every Polycom VVX350 deskphone, and if a workstation is connected to the network through that phone the workstaion will lose connectivity, while the phone…

An attack has been demonstrated on Firewalls that have an H323 VoIP helper to trick it into connecting to any TCP port and not just the ports used by VoIP….

Client Problems:Right click on the windows task bar choose Task Manager, Performance and check out the graphs to make sure nothing is maxing out.Turn off any VPN products; Encryption, extra…