Allow only certain ip to connect to telnet

Hello,

When I got a new server with my host, they asked for my ip address. This was for security purposes so only I could login to SSH. (I guess this is why?)

Anyways, I have someone in another location that needs to login as root through SSH. So I need to put his partial ip address in there so he can do some work on the server. But the question: What file do I edit and put his ip address in? Is the httpd.conf?

Thanks in advance

 

 

 

 

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