I was having a lot of problems today moving the SFTP backup target for a Cisco Unified CCX system. To cut a long story short (and it took a bloody long time to work this out!), the problem was with the ciphers that were being made available by the SSHD service on the new backup target.

Read More Unable to access SFTP server error when configuring a backup for Cisco Unified CCX 10.6.1

Today I had to setup wireless access for a group of PCs that were to be used in a training room where wired access was limited. To solve this problem I implemented an alternate login method for the existing wireless network that used the AD computer account to authenticate using Protected EAP-MSCHAPv2. This way the PCs connected to the wireless network before anyone logged in.

Read More Wireless 802.1x for Machine Auth only using NPS

I recently had some drama with a few NetScaler Virtual Servers that weren’t being monitored. I made some modifications to a script I had written previously¬†(which was inspired by Markus Kraus from¬†My Cloud-(R)evolution) and created a Custom sensor for PRTG. The script queries the powerful Citrix NITRO API on the NetScaler to retrieve a JSON…

Read More Monitoring Virtual Servers on a Citrix NetScaler using PRTG

I have recently been involved in some security audit work and found myself having to replace the self signed SSL certificates used by the secure HTTP service on a number of Cisco 3850 switches. It was a bit fiddly so I thought it deserved a post to cover the steps I went through.

Read More Generating a CSR using OpenSSL, signing it using a Windows CA and then installing it on a Cisco 3850 switch