Name to IP resolution

[vision_on]

Hi all,

Very new to Linux, so would appreciate some help.

I have an application that runs on Redhat, which is an internet filter. This server uses DNS to resolve names however someone has configured an internal DNS domain with the same name as an external website, which is causing me problems.

The website is plexus2.serco.com and someone has configured serco.com as an internal DNS domain.

Can I just use the hosts file in /etc to resolve this issue, which doesn't seem to work?

Or is there another file that resolves names to IP addresses in Linux?

Thanks.

[HROAdmin26]

Google: linux name resolution

The nsswitch.conf controls what is used and in what order. If "files" is listed before "dns" then the hosts file will be checked first.

And if you make a change, just like any OS, flush any cached DNS data.

/etc/init.d/nscd restart

[Lazydog]

The website is plexus2.serco.com and someone has configured serco.com as an internal DNS domain.

If I am understanding you correctly that serco.com is on the inside as well as the outside then I would just simple request that plexus2 be added to the internal domain. Then it would not matter if you are internal or external you would get to the server.