Checking DNS:
dig
1. What’s the IP address for a domain?
Note: ping
won’t necessarily work if ICMP
packets are refused but this does the job:
dig +short <domain name>
2. query a specific nameserver
e.g. your DNS might be OK with your internal DNS servers but not have propagated to public DNS servers like Google’s 8.8.8.8
.
nslookup