IPsec Site-to-Site VPN passes no traffic after updating to 9.406-3

Hi Trane, 

Your problem sounds very similar to mine (https://community.sophos.com/products/unified-threat-management/f/58/t/79896). Down to the fact that it does sporadically decide to start working. I do have an active case with Sophos which has been going for a few weeks now. Last i heard it has apparently been 'escalated'. 

In my case we were  able to determine that it is actually only one side that has decided to not send anything down the tunnel (which makes it look like nothing at all is happening in the tunnel). I used espdump  (guide here: https://community.sophos.com/kb/en-US/115702) to monitor the traffic and can clearly see activity on and from the remote side, but nothing on the HQ side. 

Is the same thing happening on yours?

I know this doesn't offer a solution to your problem, but i'm thinking if it does turn out to be very similar issues it kind of does point to being a bug in the firmware. And maybe someone at Sophos will take note and speed things along a bit. 

Hi, Patrick.

Well, well, well. That certainly seems to be a similar, if not identical, problem. Unfortunately, I don't have any easy means of running espdump as I administer this network from half-way across Japan. I've now got a support ticket open with the Japanese reseller and will escalate it to Sophos proper should it remain unresolved for any length of time. For the one branch office, I resorted to implementing network logon PPTP VPN on each of the desktops. It's a small office, so not really a bother.

I do hope it gets sorted quickly, though. Thanks for your input!

Hi, Patrick.

Well, well, well. That certainly seems to be a similar, if not identical, problem. Unfortunately, I don't have any easy means of running espdump as I administer this network from half-way across Japan. I've now got a support ticket open with the Japanese reseller and will escalate it to Sophos proper should it remain unresolved for any length of time. For the one branch office, I resorted to implementing network logon PPTP VPN on each of the desktops. It's a small office, so not really a bother.

I do hope it gets sorted quickly, though. Thanks for your input!

Guys, have you tried restoring the backup done automatically before you applied these latest Up2Dates?  If that didn't straighten things out, does a reboot?

Cheers - Bob

Hi, Bob.

Yeah, the very first thing I did was restore the configuration in case things got corrupted during the upgrade. Unfortunately, it made no difference.

Cheers!

In that case, I think I'd push Sophos to escalate beyond the 2nd-level.

Cheers - Bob

Thanks. So far, their response is that this can be resolved by 'normal troubleshooting'. I don't share their opinion. [li] :D

I would tell them that you're not satisfied with their response and that you'd like to speak with the manager that's preventing the case from being escalated.  I'm a really nice guy, but ...

Cheers - Bob

Hi, Bob.

In the end, the reseller was in contact with Sophos support and the mutual conclusion was that reimaging the systems with older firmware will be required. That's unfortunate, as I am half-way across the country. I will now need to discuss the matter with the client.

Cheers and have a great weekend.

trane

Hi Trane,

Can you please provide me the case# with support? I will personally look into it and provide you the information. Community members can always notify me when they have a case with support. 

Thanks

Thanks for the kind offer. I succeeded just a few hours ago in finally achieving active tunnels on both SG115s. The solution is annoyingly simple, but should not have been necessary. There seem to be a lot of overlapping semi-problems that got in the way of arriving at a timely solution. The client is currently happy that the tunnels are up, but they are now considering replacing the whole lot with a different vendor's product. Shots fired. Bang Bang.

In the end, the SG230 was the culprit. Creating the tunnels seemed to work fine, but the logs were peppered with various errors. The final solution involved:

• Tearing down ALL tunnels and their components, including destroying all network definitions;
• Creating new VPNs with a custom policy (to be compatible with another vendor's products);
• New VPN tunnels were created using MANUAL firewall rules.

The process was repeated on the SG115s, but with the difference that automatic firewall rules were fine.

For whatever reason, the SG230 now refuses to pass VPN traffic when automatic firewall rules are implemented. This was true even after re-imaging the firewall with 9.357 and restoring the configuration. What worked before, did not work now. I've spent almost 7 full workdays struggling with this issue and it includes flying halfway across the country and 4 days on-site. No longer a fan.

Yes, I'd like some cheese with my whine. I've had 8 hours of sleep total in the last 3 nights.

This thread is a little like herpes: It's the gift that keeps on giving.

How long's it been? Six weeks? The tunnels died again. This time, it was after no updates or configuration changes whatsoever from the day of the reply above proclaiming my success in resolution.

What worked to fix things before no longer works. One tunnel is mysteriously (and happily) working, but the other resolutely shows green and passes no traffic.

This. Is. Ridiculous.

Trane, via PM you mentioned that there's a fibre line involved.  In several locations with fibre, the solution was to have the ISP set fixed speed/duplex on their equipment and matching it on yours.  The problem was a conflict between the fibre router and the UTM when negotiating speed and duplex.  See #7.7 in Rulz for a description of the process.  Any luck with that?

Cheers - Bob