DLF Resources

 

How to : ssh remote login

Page history last edited by admin 2 years, 3 months ago

How to : use ssh to remote login

 

You have to log onto your router and enable port forwarding.

Assign your computer a static internal (i.e. 192) IP, and then port

forward any incoming traffic on port 22 to that IP. With ADSL

you cannot route to a 192 IP directly. It is a non-routable IP

(from the web - i.e. not a public IP) hence why it provides a home

system with an added layer of protection. Anyone wishing to get to it

from the Internet MUST first go through the router in front of it

which has your public IP assigned by the ISP.

 

If you have a static IP then use that.

 

If not then use a service such as DYNDNS

 

http://www.dyndns.com/services/

 

to get one of their domain names

(i.e. whatever.homemac.com) and configure your router to update

DYNDNS whenever your IP changes. If your router cannot do that, there

are some Mac? tools that will do it (DYNDNS will suggest some).

 

This way you ssh to user whatever homemac.com (putting in the

appropriate username and domain name of course).

 

The other consideration will be to disable root login (so someone can't ssh as

root and get su control of your box - note this appears to be case

sensitive. I had "No" in my config file and it wouldn't accept it,

had to be "no"), and even consider using a key instead of a password

challenge (best to have the key on a thumb drive that you keep with

you instead of putting it on your office computer for anyone to

copy/use). But I wouldn't worry about that one right away. Get it to

work as normal password login first. Then check out openssh

documention on the web to figure out how to tweak it.

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