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New Member

VPN from 1841 to 7206

I have been given details for a VPN setup that we use to connect to a GPRS network. We are currently using a Linux IPSec Software solution but I'm now provisioning an Integrated Services Router 1841. I am a little unsure of how to create the VPN in our 1841 to connect. The remote side is using a 7206 but they will not supply a config for us to use. Details are;

Phase 1 (ISKAMP)

Encryption: 3DES

Hash: MD5

Auth: PSK

Diffie-Hellman: 2

Lifetime: 86400

Phase 2 (IPSec)

Transform-Set: ESP-3DES-MD5

Mode: Tunnel


Lifetime: 4608000kB/3600sec

Attached is a diagram with public IPs changed. Can anyone offer some help with this? I am not sure whether I will need to use Crypto Maps and whether I will have to use ACLs

New Member

Re: VPN from 1841 to 7206

Hi Andrew

the easiest way to do this is to create a GRE Tunnel on each side and then encrypt the tunnel with an IPSEC profile.

Let Me know if you need an example config

New Member

Re: VPN from 1841 to 7206


The only problem with this solution is that the GRE tunnel requires another subnet over it, correct? I am using this sort of configuration for connectivity between branch offices, however I have no control over the configuration of the 7206 as it is run by Vodafone. When we asked for a configuration example, they said they don't give out configuration details apart from PSK and ISAKMP and IPSEC config requirements :(