nslookup failures *** UnKnown can’t find www.vmware.com: Query refused

I am on a VMware environment. On the host machine I do C:\WINDOWS\system32>nslookup www.vmware.com Server: UnKnown Address: 109.169.85.7 *** UnKnown can’t find www.vmware.com: Query refused but I can access the site in browser. Every thing is working fine perfectly. I have this question because my virtual machines can not access internet and when I do…

Postfix – MX: Host not found error but dig and nslookup are OK

I had a working Postfix email server on Centos 7 when I decided to reconfigure my host networking (IP addressing, DNS, etc.), after reconfiguration, mail sending is no longer working. /var/log/maillog: Dec 7 10:20:03 cedrick postfix/error[1711]: 030763B26: to=<gmailaccount@domain.com>, relay=none, delay=0.09, delays=0.08/0/0/0, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error…