I use Redhat ES 4.0 on my server
I run a small business with 12 users
I am the only one who uses remote access
I been having lately an exessive number of Brute-Force attacks and am concerned about security.
My router is set up to allow only ssh protocol
router is also set up to bar access while I am not online. meaning: server is only vulnerable while I am accessing it remotely.
I am looking to limit remote ssh access to one user-id
and restrict remote session to only one at at a time
Meaning:: do not allow a a second remote ssh login session while one is in progress
Is alternative practical?
Any other alternatives?
Will also consider a commercial solution..
Your help is appreciated
There are several ways to manage these automated attacks to ssh
1. There is this scripts "denyhosts" that at the third intent to an account failed, disables ssh for that host. url: http://denyhosts.sourceforge.net/
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