Cisco Simple GRE with IPSEC Tunnels
GRE with IPSEC KB ID 0000951 Problem I’ve spent years setting up VPN tunnels between firewalls. The only time I’ve ever dealt with GRE is for letting VPN client software though firewalls. GRE’s job is to ‘encapsulate’ other protocols and transport those protocols inside a virtual point to point link. Below is the topology, I’m going to use. The tunnel will run form Router R1 to Router R3, once...
Exchange Stopped Working?
KB ID 0001749 Problem I see various posts in online forums, and the process is held up because a lot of techs can’t do basic troubleshooting on their Exchange deployments. So I thought I’d put together some basic ‘first steps’ for you to do when your ‘Exchange Stopped Working’ This way you can at least get an error code to search for or a better idea of what’s going on. Exchange Stopped...
VMware Edge Gateway VPN to Cisco ASA
KB ID 0001658 Problem I was asked to setup a VPN to help out a colleague this week. When I had a look, one end turned out to be an Edge Gateway, I wasn’t that concerned, I’d done similar things in my prior role, I just didn’t have access to the vCloud or VMware at this datacenter. Depite my best efforts on the ASA, the tunnel refused to come up, it took a little looking ‘under the covers’ to accurately...
Windows Client(s) not ‘appearing’ in WSUS
KB ID 0000591 Problem Before you start troubleshooting clients, how long have you waited? I usually setup and configure WSUS up at the start of a job, then leave it alone for a few DAYS, before I start worrying. Here are the steps I usually follow to get the machines listed in the WSUS management console. Solution Before doing anything further, simply try running the following two PowerShell commands, (on the problem client,) and...
Using a KMS Server
KB ID 0000582 Problem Given the amount of deployments I do, it’s surprising that I don’t use KMS more often. Like most technical types, I find a way that works for me, and that’s the way I do things from then on. However these last few weeks I’ve been putting in a new infrastructure for a local secondary school. Their internet access is through a proxy server, that refuses to let Windows activation work....