/etc/host & /etc/hostname files and dual NIC server

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I have a rhel 7.0 system with two NICs. NIC-1 is "bound" to my public static IP addresss. The other NIC (NIC-0) is "bound" to an 192.168.xxx.xxx internal LAN address.
I have the Firewalld service enabled with the External Zone "bound" to NIC-1, and the Internal Zone "bound" to NIC-0.
NAT and IP masquerading is "turned on".
I have also defined two domains an external one (ids4zos.net) and an internal domain (richkids.net)
In the /etc/host file are the following entries:
69.54.xxx.xxx redriver01 redriver01.ids4zos.net
192.168.10.6 redriver00 redriver00.richkids.net
127.0.0.1 localhost localhost.localdomain

In the /etc/hostname ... :
69.54.xxx.xxx redriver01.ids4zos.net redriver01
192.168.10.6 redriver00.richkids.net redriver00

However I'm wondering if this is defined correctly
There are no apparent problems.
However if anyone has any suggestions an/or ideas on how better to config this environment I would be most appreciative.

Best Regards

Guy

2U
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SW Red Hat Guru 4022 points
11 March 2015 8:51 AM

Hello

Edit: I just noticed, you have /etc/host, I think that should be /etc/hosts

The /etc/hosts/ looks different to mine and the example in the man page. It looks like you have the FQDN and the hostname swopped.

The contents of the /etc/hostname file looks strange. If we look in the man page:

man hostname

It says, in "The FQDN" section:

The recommended method of setting the FQDN is to make the hostname be an alias for the fully qualified name using /etc/hosts, DNS, or NIS. For example, if the
hostname was "ursula", one might have a line in /etc/hosts which reads

          127.0.1.1    ursula.example.com ursula

So that example does not match your /etc/hosts/ contents, and then further down in the man page:

FILES
/etc/hostname Historically this file was supposed to only contain the hostname and not the full canonical FQDN. Nowadays most software is able to cope with a full FQDN here. This file is read at boot time by the system initialization scripts to set the hostname.

   /etc/hosts Usually, this is where one sets the domain name by aliasing the host name to the FQDN.

HTH

2U Active Contributor 265 points
11 March 2015 2:43 PM

Hi Stephen.
Thank you for the clarification.
However when I issue a "host" command for my internally defined domain (richkids.net)
I get the IP addrs of a registered richkids.net
I was using richkids.net on my linux server because I have five windows 7 machines on my internal LAN and they all use the windows group name of richkids. However I guess a windows group name is NOT the same as a domain name.
I'll have to go back to the "drawing board" and figure it out.
Thanks again for your help

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