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Configuring VPN on Cisco 1921/K9 routers

Posted on 2011-03-12
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Last Modified: 2012-06-27
Is there a good guide for configuring site to site vpn using Cisco 1921 routers?  I am trying to connect my two fire houses via commercial broadband services and have had no success.

Additionally, there is a requirement for a few remote login sessions.  I intend to use Cisco's VPN client to do that.

Once that is configured, I need to configure the firewall to include web filtering.

IOS version is 15.0(1)M3.

I am comfortable with the CLI and the CCP GUI.

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Question by:ITFireman
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Istvan Kalmar earned 500 total points
ID: 35117677
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Expert Comment

by:diepes
ID: 35120867
Do you have fixed IP's at both ends ?
Can you ping the one router from the other ?
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Author Comment

by:ITFireman
ID: 35121335
@diepes.  Yes I have fixed IPs at both ends and the routers can ping each other.
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Expert Comment

by:diepes
ID: 35123160
@ITFireman: I would suggest to start with a GRE tunnel.  No encryption, but easy to setup.

interface Tunnel0
 ip address 10.0.0.1 255.255.255.0  !!<Use 1 on one side, and 2 on the other e.g.
tunnel source Ethernet0/0        !!<Own external interface
 tunnel destination 10.10.10.1  !!<Otherside external ip.

 tunnel key 123

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Author Comment

by:ITFireman
ID: 35123639
@diepes Ok...  But I do require encryption since I am dealing with company and patient information.  Where do I go once I get beyond a GRE tunnel?

@ikalmar Thanks.
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by:Istvan Kalmar
ID: 35189617
HI,

Did you tried it?
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Author Comment

by:ITFireman
ID: 35195872
@ikalmar

Yes... I followed the setup in the first link you sent.  The link is up.  That is further than I was able to get before.  Howerver, I am not able to ping anything on the opposite network.

Any suggestions?
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Expert Comment

by:diepes
ID: 35206258
@ITFireman

You can run a # debug icmp
on both sides to see if there is only one way connectivity.

As to the GRE, once you have GRE you can wrap it in ipsec, but it seems as if you are close.
Maybe paste your current config.
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Author Closing Comment

by:ITFireman
ID: 35220514
Did not exactly address the problem.  But I was able to at least test my routers to verify I could connect.
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