How to change 'localhost' ip address on workstation

cpatte7372
cpatte7372 used Ask the Experts™
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Hello Experts

This is a very easy one.

Can someone please show me how to change the ip address of the 'localhost' on my pc.

I believe there is somekind of 'host' or 'winhost' file that I need to change.

At the moment if I ping localhost it comes up with 127.0.0.1, which we all know is the loopback address. I want to change it to specific ip address.

Cheers

Carlton
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Top Expert 2016

Commented:
edit your hosts file and change localhost to point to where you want. (you need admin permissions)
Dave BaldwinFixer of Problems
Most Valuable Expert 2014

Commented:
I recommend against changing localhost to any other IP address.  You don't know how many other applications depend on that.  Instead, find the IP address of your machine and use that.  Here are two methods of finding your IP address: http://www.ehow.com/how_5621076_ip-address-windows-7.html
You need to take ownership of the %windir%\system32\drivers\etc\HOSTS file, first.

Then make a shortcut on your desktop with a target of
%windir%\notepad.exe "%windir%\system32\drivers\etc\hosts"
Start in: %windir%
and named HOSTS.

Then you can just open that shortcut when you want to make changes to HOSTS.

However, I don't really think you can change 'localhost' from 127.0.0.1 with HOSTS, as it's hard-coded...  in fact ALL 127.x.x.x addresses are reserved for loopback, so if you ping 127.100.100.100 you will get a reply whether it's in HOSTS or not; if you change the loopback entry in HOSTS to
127.100.100.100  localhost
flushdns/registerdns and/or reboot, then do
ping -a 127.100.100.100
it will still not resolve to "localhost"
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Dave BaldwinFixer of Problems
Most Valuable Expert 2014

Commented:
Doesn't it work the other way around, ping -a will resolve names to IPs but not the other way around?  On this machine, 'localhost' resolves to '::1' which is the IPV6 version.
No... DNS resolves names to IPs.

Names are not needed at all to run a ping... when you ping a domain name it gets the IP from DNS and every hop along the path actually uses the IP address, not the name.

If you ping a reachable IP address no domain name is displayed; ping -a essentially does a reverse DNS lookup.
Danny ChildIT Manager

Commented:
what are you actually trying to achieve here, please?
Localhost is *supposed* to be the loopback address:

http://en.wikipedia.org/wiki/Localhost

If you can describe the actual problem, we can widen the scope of the answers.

Author

Commented:
Cheers

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