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Sonicwall VPN tunnel down between 2 sites

By dgarcia_213 ·
Hi all, I have a central Sonicwall and 10 remote sites in all with VPN tunnels established. The central site cannot communicate with one of the remote sites via this VPN tunnel. I just came into this infrastructure two weeks ago, and I've confirmed that all of the other 9 sites can be communicated with, except for this one.

We're currently on SonicOs Enhanced firmware version 5.6.0.9-49o, and everything in the settings, such as the shared key, the interface address, etc., looks ok. I'm not too sure what the issue could be with this particular WAN VPN tunnel. So far, I've backed up the config, bounced the device, confirmed the resources are back online and accessible via local LAN, but it still does not show as online as the other sites do. Any suggestions? What are best practices for troubleshooting issues such as this?

Thanks.
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Dan

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All Answers

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For starters...

by gechurch In reply to Sonicwall VPN tunnel down ...

1) Check the Sonicwall logs
2) Replace the Sonicwall at the remote site with a spare (with 10 remote sites, I'd suggest keeping a spare).

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Reponse To Answer

by dgarcia_213 In reply to For starters...

Thanks for the response.

I looked at the logs, and here is the most recent error regarding this VPN tunnel:

07/09/2013 10:35:52.064 Info VPN IKE IKE Initiator: Remote party timeout - Retransmitting IKE request. 173.161.227.73, 500 174.57.48.43, 500 VPN Policy: Brick

Any suggestions?
--
Dan

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Reponse To Answer

by gechurch In reply to For starters...

Take a look at http://kb.guru-corner.com/question.php?ID=216 for some good steps to check out. See http://forum1.netgear.com/showthread.php?t=30161 too.

A couple of other things I've read to try are changing the IKE ID method, and temporarily turning off aggressive mode.

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