Client not using local relay but going to the server

[fraserknight]

I have a relay that local clients are not selecting - any ideas about what may be causing this and how I perform problem determination?

[atlauren]

I ran into a similar issue here. In my case, it turned out that the clients couldn’t ping (ICMP) their possible relays.

Winsock error 8 vs AntiVirus

Recently we acquired a couple endpoints which have had very odd behavior. They register and talk to their relays for a spell, and then go dark. The endpoints themselves are up and behavior normally, but the agent no longer communicates with the server. On inspection of the agent log, right around the time it went dark it it has winsock error -8… and nothing since then. As it happens, both endpoints have AVG Free installed, of questionable vintage. Could it be that AVG’s network monitoring ha…

[AlanM]

The most common issue is its a Windows relay that other Windows machines resolve the name using WINS and that you are trying to connect non Windows clients to (or machines that haven’t yet done their WINS discovery)

If the relay isn’t in DNS and the endpoint can’t resolve it you will have problems.