A Tale of SIP, RTP and the One Way Audio Issue
I’d tell you a UDP joke, but you might not get it! Nothing is more apt with…
Networking
Networking articles.
Setting up a Raspberry Pi as a Console Switch
So this is pretty neat. It has already saved me once. Instead of buying an expensive console…
Big-IP iControl REST Remote Code Execution – CVE-2022-1388
So yeah, I’m late to the party on this one. The latest in a long list of…
How To Stack a Cisco 3850/9300 Catalyst Switch
OK long time no post. That’s my bad. I have been busy rolling out Cisco Catalyst switching…
Palo Alto: URL Filtering not showing licensed
TLDR – Delete expired URL Filtering license once the Advanced URL Filtering license is installed! Or the…
Troubleshooting SIP/2.0 488 Not Acceptable Media
Last week I had an interesting issue with one of our SIP Voice circuits. Calls to a…
AD CS ‘PetitPotam’ Relay Attack Using Mimikatz and ntlmrelayx
Hot on the heels of PrintNightmare, there is yet another way to take over Active Directory. Petit…
Create A Custom Call Variable Layout for UCCX Finesse Desktop
Continuing on with yet more Voice, I recently cutover to a new UCCX 12.5 cluster. As part…
Cisco UCCX Contact ID:x, Channel ID:y, Contact is in Terminated/Connected state.
So I’ve just finished rolling out a fresh UCCX 12.5.x cluster. One of the interesting issues I…
Migrating Cisco IP Phones Between CUCM Clusters
I’m currently in the midst of migrating two old CUCM clusters (8.6.x, 9.1.x) to a new 12.5…