no route to network after temporary disruption in service by ISP
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Recently I've been experiencing some strange behavior and I'm unsure what the problem / cause actually is.
I currently have a Netgate SG-5100 and a 1Gb FTTH connection. Occasionally I will experience packet loss and/or complete outages from the ISP. In most cases, pinging the gateway will fail but in some cases pinging the gateway still succeeds.
In all cases, after the interruption, routing stops working. It is first apparent in that DNS lookups start to fail but then if I SSH to the router and try to ping any external IP addresses I get "No route to host" errors.
The routing tables look appropriate.
If I reboot or 'reroot' the router, everything starts working as expected. The problem persists until the device is rebooted or rerooted.
The problem started about two months ago and is extremely intermittent.
Can anyone offer any insight as to where to look for the cause of this problem and hopefully fix it?
I'm running pfSense 2.4.5-RELEASE-p1 (amd64) with the latest versions of the following plugins installed:
acme
Avahi
bandwidthd
haproxy
iperf
nutThanks.
Alan