We recently recently patched a management Windows server 2012 R2 and now it is giving the following error when trying to connect a RDP session:
"This Computer cannot connect to the remote computer.
Try connecting again. If the problem continues, contact the owner of the remote computer or your Network administrator."
Here are the symptoms:
- Some admin (only admin accounts access this server) are able to access with an IP or a newly created CNAME (created for the purpose of troubleshooting this problem).
- All admin get the stated error when using the A record created by DHCP. This A record was created when the machine build a year ago.
- Some admin get the stated error no matter what.
- Here are some connection tests (tried with multiple users:
- ping (works)
- nslookup (returns correct name)
- tracert (returns correct name)
- ping (works and resolves name)
- nslookup (shows correct info)
- tracert (shows correct info)
Here are the steps taken to troubleshoot:
- IPConfig /FlushDNS and IPConfig /RegisterDNS
- Host file is not used but we checked it anyhow
- There is no proxy
- Reset the IP Stack (netsh int ip reset C:\resetlog.txt)
- Tested with several admin on different workstations.
- Restarted server
I have attached an excel file with the most recent updates applied on 31 Jan 2018. Again, this server was built a year ago and has been used as a management server across several offices being accessed every day.