Recently I was given a retired Astaro unit (ASG 220 to be specific, licence expired, company bought a newer model). I followed pocedure mentioned here: https://community.sophos.com/products/unified-threat-management/astaroorg/f/52/t/28110 to install home licence on a unit. I did some configuration, firewall rules, whatevers.
Everything was OK to the point when I've connected a unit to the internet. Rather standard procedure - new interface, eth1, IP goes here, netmask, gateway goes there, apply. I did some pings from the outside to the unit.
Then, after a minute or two, both interfaces (eth0 LAN and eth1 WAN) started to behave strangely. They seem to be on for a souple of seconds, then they both go off at the same time. After few seconds they both go on, and so on and so on. Link indicators on both Astaro and a connected switch behave in the same way.
Restarting a unit has no effect.
I've replaced switch and patchcords with no effect.
What could possibly be a problem?
Fun fact: link light stay on when I do system shutdown from local console.
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