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DXMP

02-25-2011, 02:48 PM
Hi,

I heard that the most common way for a linux machine to be hacked is through SSH/SSHD. How can I secure my SSH using keys?

DewlanceCTO

02-26-2011, 08:39 AM
(02-25-2011, 02:48 PM)DXMP Wrote: [ -> ]Hi,

I heard that the most common way for a linux machine to be hacked is through SSH/SSHD. How can I secure my SSH using keys?

1. Change your default SSH Port

2. Generate a SSH keygen: http://linuxproblem.org/art_9.html

3. Disable Password authorization(Warning, First generate a keygen, If you can't connect to SSH then don't try to disable password authorization)

Code:
nano /etc/ssh/sshd_config
and change
Quote:#PermitRootLogin yes
to
Code:
PermitRootLogin no

Now, Restart sshd
Code:
/etc/init.d/sshd restart


4. You can also find some tutorials on google
Dewlance® Forum > Web Hosting Tutorials > Linux Xen-HVM, KVM VPS - Tutorials > How to secure SSH/SSHD?