After having followed several tutorials and none of them worked for me, someone might help me here.
I have a Cisco 871 router, version 12.4(4)T7.
Currently, I have it configured as a PPTP VPN server. But as I want a bit more security, I'd like to use it as a IPsec VPN server.
The article on https://serverfault.com/a/115862 helped me pretty much, except that the command
crypto ipsec transform-set ESP-AES-128-SHA-LZS esp-aes esp-sha-hmac comp-lzs
returns the error message:
"Transform comp-lzs is not supported with the current hardware configuration."
I tried to finish config without lzs compression, but the connection fails on Linux Mint 15 (vpnc-client). As I didn't find any log, I cannot provide more information about the reason.
Was anybody successful at this?