Cisco ASA – L2TP over IPSEC VPN
KB ID 0000571 Problem Note: This is for Cisco ASA 5500, 5500-x, and Cisco Firepower devices running ASA Code. When Cisco released version 7 of the operating system for PIX/ASA they dropped support for the firewall acting as a PPTP VPN device. Note: If you want to use PPTP you can still terminate PPTP VPNs on a Windows server, if you enable PPTP and GRE Passthrough on the ASA. But if you want to use the native Windows VPN client you...
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...
VPN Problem Cisco PIX v6 to Cisco ASA 5500
KB ID 0000761 Problem I found this out purely by accident today, while replacing an old PIX 506E that had died with an ASA 5505. The client’s other site still had a PIX 506E (Running 6.3(5)). I was setting up the VPN, and noticed something that WOULD have been a problem if I had not spotted it. Solution Essentially the older PIX firewalls are set for 3DES encryption, MD5 Hashing and Diffie Hellman 2. After version 8.4 the ASA...