External IP Address of Linux Server

Shell Programming and Scripting
1

Hi,

I am trying to find the external IP address of a server "XXX".
I logged into server "XXX" and executed nslookup XXX. output number is 123.23.23.45
Later, i have executed "curl http://whatismyip.org". This time i got a different number 611.34.63.22

Out of these two numbers, what number should i share with outside companies who wish to receive file from us through FTP ( outside company needs to give permission to our server to connect to theirs ).
What is the difference between these two numbers?

Please help me out.

2

It can be neither of those addresses. It depends on network topology and configuration. Your (server) administrator should give You this answer, eventually Your ISP.
And I think, there's sth wrong with the second IP: 611.x.x.x :slight_smile: Maybe a typo...
Is the XXX server behind any NAT? Does it have direct internet access?