How to configure nslookup/dig to resolve hostnames mentioned in /etc/hosts? DNS masquerade

[cah]

nslookup and dig cannot resolve IP address from /etc/hosts since it was not design that way. There is a workaround that can help resolve entries in /etc/hosts.

You may need an account with Red Hat to access the following link:

https://access.redhat.com/site/solutions/46767

Steps:

1. Install DNSMASQ

   Code: Select all

   # yum install dnsmasq -y
   

2. Edit /etc/resolve.conf to add the following line lookup the localhost

   Code: Select all

   nameserver 127.0.0.1
   

3. Add the following lines in /etc/dnsmasq.conf

   Code: Select all

   domain-needed
   bogus-priv
   filterwin2k
   resolv-file=/etc/resolv.external
   expand-hosts
   domain=example.com
   log-queries
   log-facility=/var/log/dnsmasq
   conf-dir=/etc/dnsmasq.d
   

4. Make a file for to specify external DNS server

   Code: Select all

   cp /etc/resolv.conf /etc/resolv.external
   

5. Put the entry of your entries not in DNS into /etc/hosts

   Code: Select all

   1.1.1.1    test.xyz.com
   

6. Start DNSMASQ Service

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   # service dnsmasq start
   

7. check the results

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   # nslookup test.xyz.com
   Server:          127.0.0.1
   Address:     127.0.0.1#53
   
   Name:     test.xyz.com
   Address: 1.1.1.1
   

NOTICE: Whenevera new entry is added to /etc/hosts, the dnsmasq service needs to be restarted to take effect.

Code: Select all

# service dnsmasq restart
Shutting down dnsmasq:                                     [  OK  ]
Starting dnsmasq:                                          [  OK  ]