Microsoft Azure To Cisco ISR Router Site to Site VPN
KB ID 0001220 Problem Last week I was having problems getting a VPN up from a client’s Cisco ASA into Azure. This was because the Azure estate was using ‘route-based’ or a ‘dynamic routing VPN’. See the following article; Azure to Cisco VPN – ‘Failed to allocate PSH from platform’ So the firewall was a non-starter, but Cisco ISR routers are supported, and they can handle virtual tunnel interfaces...
Cisco ASA IKEv2 – ‘Failed To Allocate Memory’
KB ID 0001218 Problem This week I was trying to get a VPN tunnel up for a client. They wanted a tunnel from their Cisco ASA into Microsoft Azure. Normally I’d use IKEv1 (because I know how to troubleshoot it!) But the guys running the site in Azure were using policy routing, which needs IKEv2. So I converted from IKEv2 to IKEv2. As I said I’m used to debugging IKEv1, but not IKEv2, so I was struggling to make sense of...
Cisco ASA – Converting IKEv1 VPN Tunnels to IKEv2
KB ID 0001196 Problem We’ve had IKEv2 support on Cisco ASA for a while, (since version 8.4). I tend to setup site to site VPN tunnels at command line, and on the rare occasions I’m using the ASDM I normally just ignore the IKEv2 settings. Like all techies I know a way that works, so I will keep doing it that way. What’s the difference between IKEv1 and IKEv2? IKE version 2 is a lot more efficient and has a smaller...