Hi,
I've installed Eset Endpoint Security to our clients and since this installation my clients (~70) lose their DNS for sometime. what does that mean?
- nslookup ends in an timeout -> DNS server unknown
- ping to ip and domain name work well for a while
- clients aren't able to print because \\dc\printer can't be found and is displayed as "offline"
- sometimes an "ipconfig /release and renew" works, sometimes not, sometimes disabling and enabling NIC on clients works sometimes not, a reboot of client works sometimes and sometimes not,...
- after a while (30mins, 3h, 1.5h, 10mins -> randomly) suddenly it works again.
I've following configuration:
- DC (Server 2012 R2 -> DNS, DHCP Server, DC, etc.)
- DC02 -> Failover Server for DC, but it's not working correctly
- via DHCP DNS and WINS 192.168.0.1 (dc) and 192.168.0.15 (dc02) are correctly configured
- Eventviewer on server and clients doesn't give a hint what's going wrong
Are there any known issues according to this problem or does someone have any idea?
Thank you very much.
Cheers, Christoph