☰

intranet dns lookup fetching incorrect ip

tag-icon • tag-icon centos7 internal-dns
intranet dns lookup fetching incorrect ip

We have a host entry on our server in /etc/hosts file. So there is an entry as follows:

10.74.74.76 foo

But on the same machine, via SSH I do the following:

$ host -t a foo
foo.internal.domain.com has address 10.43.55.23

Why is this not referencing the ip in /etc/hosts?

답변1

host is a (simple) DNS lookup utility.

Any data in your /etc/hosts file is NOT DNS.

That means that the host command will always query the DNS servers you have configured and it does not honor the typical precedence your system resolver uses in first querying the local hosts database before attempting to resolve the host/FQDN.

답변2

The host command is a DNS lookup utility that always uses DNS as a resolver; never /etc/hosts file.

From host(1) man page:

host is a simple utility for performing DNS lookups.

server is an optional argument which is either the name or IP address of the name server that host should query instead of the server or servers listed in /etc/resolv.conf.

관련 정보