[SSHd] Limiting access from authorized IP's

Mel fbsd.questions at rachie.is-a-geek.net
Fri Apr 18 09:16:04 UTC 2008

On Friday 18 April 2008 10:51:45 Gilles wrote:

> 1. I'd like to limit connections from the Net only from specific IP's.
> It seems like there are several ways to do it (/etc/hosts.allow,
> AllowHosts/AllowUsers, TCP-wrapper, port-knocking, etc.). Which would
> you recommend?

hosts.allow == TCP wrapper.
I recommend firewall, with hosts.allow backup. In the event the firewall gets 
disabled, hosts.allow takes over.
Note though, that with setups like this, you will have to call someone to add 
your IP to the lists, when your IP changes or you're on a location you didn't 
think you'd need access from.
I personally prefer sshd to be world accessible and block scans, since I 
consider being locked out of the machines a security risk as well...

> 2. Although it's up and running, I can't find SSHd in the list of
> installed apps:
> $ which sshd
> /usr/sbin/sshd

It's not a port, comes with the base system.

Problem with today's modular software: they start with the modules
    and never get to the software part.

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