External IP via command line

[HCHTech]

Just something I learned this morning. I needed to verify a client's external IP address via the command line. There are probably other ways, but this worked like a charm:

nslookup myip.opendns.com. resolver1.opendns.com

 

[Markverhyden]

And that's the exact same command you can use in Linux and macOS.

 

[Moltuae]

I wrote a small batch script using that method a while ago (useful for running via ScreenConnect or similar remote support software):

FOR /F "tokens=1,2 delims= " %%A IN ('nslookup myip.opendns.com resolver1.opendns.com') DO IF "%%A"=="Address:" SET EXTIP=%%B
set /p=%EXTIP%<NUL|clip
msg * /time:5 "The external IP ("%EXTIP%") has been copied to the clipboard."

It extracts the IP address, copies it to the clipboard then displays a message (for a predefined number of seconds):

 

[Craig D Campbell]

I just type www.ipchicken.com in my browser.

 

[Diggs]

I just type www.ipchicken.com in my browser.

Please read the words "command line".......

If your using a browser just ask Google what your IP is but that's not the question.

 

[Craig D Campbell]

Sorry I guess I missed that. But I thought I would suggest something quicker and easier.

 

[nlinecomputers]

nslookup will tell you any FQDN not just your own ip addresss.

 

[LordIntruder]

I wrote a small batch script using that method

I did the same for Linux.

#!/bin/bash
extip=$(nslookup myip.opendns.com. resolver1.opendns.com | grep "Address" | grep -v "#53" | cut -d' ' -f2)
printf $extip | xclip -sel c
wall "external ip address "$extip" copied to clipboard"

Note: xclip isn't installed by default on some distros.