Since two weeks, we got many 502 error page when we try to access web
sites. We need to retry 3-4 times, then we are able to access the web
site. When this error occur, I saw on the Proxy Console, option 4
(Display DNS statistics), that my 3 DNS servers are down.

Any idea?

The server is up and running since 50 days and we didn't change anything
on it.

BorderMGR 3.8sp3
Netware 6.5sp3b

Thank you