Cisco VPN – Warning   Leave a comment

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…

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Posted February 17, 2009 by benryanau in Cisco

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