Cisco 1751 dynamic Tunnel to an static Tunnel

[h.krischeu]

Hello NG,

i have a great problem with one of my Cisco 1751.

2 offices with static ip and one with a dynamic ip-adress.

The office with the dynamic ip-adress was using before changing the provider a static ip-adress with sdsl. Now we are using adsl with dynamic ip-adress.

The internet and email is working fine, but the vpn tunnels are not working any more. It needs a start/end point.

How can it be solved? Perhaps with DynDns-host entry?

The ip-Adress could be updated with Linux-host!

One hot hint would be helpful.

Thanks in advance

p.s. the actual not working tunnel is:

interface Tunnel0

ip unnumbered FastEthernet0/0

tunnel source 217.110.xxx.xxx

tunnel destination 195.30.xxx.xxx

tunnel mode ipip

==> The entry "tunnel source 217.110.xxx.xxx" has to be changed into a valid NAME, e.g. vpntunnel1.dyndns.org

How can this be solved?????

[h.krischeu]

There is a solution.

The virtual interface Dialer1 !

interface Tunnel0

ip unnumbered FastEthernet0/0

tunnel source Dialer1

tunnel destination 195.30.xxx.xxx

...

[h.krischeu]

It works with t-online and netcologne.

1.) The accesslist has to be changed!!!

2.) crypto isakmp key ddddd address 0.0.0.0 0.0.0.0

(between the 4 zero´s are one space!)