I can't seem to use putty anymore and can't ping 192.168.78.51 or 52 from my host Windows machine. Everything was working fine the other day. The nslookup works fine as below $nslookup collabn-cluster-scan.racattack
All the rac services are starting and working correctly. The linux guests can ping each other and local host.
It's just the client software that doesn't work.
Do you have any idea how to troubleshoot such an issue?