I have the following in the dmesg on a server, am I supposed to be worried about this? I don't recognize this IPs:

Mar 11 07:09:34 omnibackup in.routed[517]: [ID 667074 daemon.warning] Answer Query sendto(vioif0, 185.94.111.1.60623): Network is unreachable

Mar 11 14:14:26 omnibackup in.routed[517]: [ID 507386 daemon.error] empty request from 204.76.203.17

Mar 11 23:56:27 omnibackup in.routed[517]: [ID 765856 daemon.error] request from 81.29.142.50 for unsupported (af 0) 0.0.0.0

I would;)

Corrupt packets or a Bad Guy(TM) ?

if IP addresses are unknown, then the question would be - what it is doing with your in.routed and why are those packets reaching in.routed...

# geoiplookup 185.94.111.1

GeoIP Country Edition: RU, Russian Federation

both are from ru.

Oooh boy...

real question is why are you running in.routed at all?

I got the memory about it getting started by default when IPv4 routing is enabled....

but I may be hallucinating;)