We started experiencing some DNS issues in the last couple of weeks. certain traveling websites will not come up. The site name resolves but at times it comes up and other times it does not.
We are also not able to ping 184.108.40.206 or do NSLookup.
Ping and nslookups worked fine until recently.
We recently migrated from one ISP to another and everything worked fine for two weeks after that move.
There no entries on the DC Logs related to dns. Windows firewall has not changed either .
Any suggestions on how to address this issue?