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Cisco 837 ipsec VPN to Watchguard Firebox

Posted on 2008-06-24
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1,310 Views
Last Modified: 2013-11-16
Hi All,

I look after a Cisco 837 router for one of my clients.  It works perfectly, except recently i have been asked to set up a vpn to another office.  

The other office is running a Watchguard Firebox, but i have no control over it and I have no access to it.

The details they have given me are as follows:
External ip address of the other site - 84.xxx.xxx.xxx
Internal ip address of the router - 192.168.0.1
Internal ip address range - 192.168.0.xxx
Gateway name
Security association proposal type - ESP
Authentication - SHA-HMAC
Encryption - 3DES-CBC
Preshared key - $xxxxxxx$

I thought I had set up the router correctly as in Cisco SDM it shows the connection as being up, although I can't ping anything at the other side, nor can I access a terminal server at the other site.

The only thing that I can see that i have done differently is use 3DES encryption instead of 3DES-CBC encryption - are they the same thing?

If anyone could shed any light it would be much appreciated.  I am happy to post config files if they will be of assistance?

Thanks,
Richard
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Question by:RichardA1984
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Author Comment

by:RichardA1984
ID: 21863486
I have attached the config file and upped the point to 500.  Any assistance really would be very helpful :-)

Thanks,
Richard.
Cisco837.txt
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Expert Comment

by:dpk_wal
ID: 21864216
I would be able to help you with watchguard configuration; not too sure about cisco; i think 3des and 3des-cbc should be fine; can you post some logs which you are seeing or if possible from remote end. The logs would make it clear as to where the negotiations are failing.

Please do change two octets of all public IP addresses before posting anything.

Historically I have seen xauth to cause problem; if possible disable xauth on cisco and this should help.

Please check and update.

Thank you.
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Author Comment

by:RichardA1984
ID: 21866081
Hi dpk_wal,

Thanks for your suggestion.  I have disabled xauth in the Cisco router, bcause i heard that it sometimes caused issues.

I have requested the logs from the other office, I will post them on here as soon as they are received!

Thanks for your help
Richard.
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Accepted Solution

by:
RichardA1984 earned 0 total points
ID: 22267427
Hi,
Thanks for your help with this.  Ultimately I found out that the config was correct and the issue was with the watchguard at the other side.  Unfortunately i'm not sure of the exact problem with the watchguard as i don't administer it, although i belive it was a firewall related issue.

Thanks
Richard.
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