A system administrator receives reports from users of odd behavior in regard to a recently installed server. While reviewing the server network configuration, the systems administrator does both a forward and a reverse DNS lookup on the host, along with the network adapter configuration.
Which of the following is the problem identified in the output above?
A. There is no reverse DNS entry for this host.
B. The server IP address is incorrectly configured.
C. The DNS lookup entry is incorrectly configured.
D. The reverse DNS entry is pointing to a different host.
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Copied this from a user neo20011 to give credit where its due:
first commandline is a DNS query of what IP address is stored for server.company.com
$host server.company.com
it gives the result 129.168.0.100 (note the first octet is 129, not 192)
the scond command is a reverse DNS, called ARP, looking for the name that is associated with an it yields a result of web.company.com
the last command ifconfig is a command run on the server locally to see what IP it is configured with and it yields 192.168.0.100
so the conclusion is the server on itself is configured with 192.168.0.100 and in DNS it is configured as 129.168.0.100
since DNS is the master record file for all network devices, the issue seen is that the DNS record for this machine (in DNS) is wrong.