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mat000001
Beginner

Site to Site VPN-ASA5505- Both firewalls go offline at the same time?

We have a situation where a recent office expansion required a site to site VPN set up between to locations using ASA5505 on both sides. We have ping monitors set up checking both firewalls (and select hosts behind them) but both are in different states on different ISPs. Twice now I have had late night down alerts which would seem reasonable if it were just one (ISP maintenance etc.) but both firewalls seemed to go offline. Or at least drop ping requests at the same time.

To put a wrinkle in the situation there is one host that is on the same ISP as the first site but not behind the firewall and it went offline at the same time. I have checked logs and config but I am not seeing anything that might point to the cause. We have other hosts at these sites and other sites monitored from the same location and they didn't bounce so I don't believe its an issue with the monitoring service.

Any ideas as to what might cause all of these hosts to drop ping requests at the same time?

Thanks in advance for any suggestions!

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