A warning if you use Cisco IOS-based PPTP VPN's.

I've got a 2651XM running 12.4(15)T5. I was having terrible trouble establishing a vpn from Visa SP1 - the tunnel would just not work, the "verifying username and password" prompt just timed out. I was using the config I posted in another blog entry which worked fine on a c837.

I tried everything - pulling MPPE and using PAP - to no avail.

Turns out the command "ppp lcp predictive" under the Virtual-Template was killing it - and no debug would clearly show what was going on.

So beware...