How To Secure A FreeBSD Server For Shell?

Mar 13, 2007

For hosting irc and shells i heard that the best choice for OS is the FreeBSD..

I would like to know if there are any toturials or if someone can write one.. (or give some tips) of how can i secure a machine running FreeBSD and used for irc + shells!

For example how can i install a firewall, a rootkit etc etc..

Also what about putting users at jail? (not allowing them see other dirs except theirs) how can i do that?

Also what about dont allow users use some commands like dmesg, ping, traceroute, and also how can i make them when they do ps -aux to only see their processes (to not be able see the other processes from other users..)

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I have several question for make shell hosting company:

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2. Is it possible to use linux as OS for shell hosting company?

3. How to secure linux OS for shell hosting company?

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I've been a web developer for some years now, and I've been working with PHP/MySQL in Linux quite a lot, but I've never worked with Linux. But now, I'm in a project where the last programmer was a FreeBSD-guru, but not so good in PHP/MySQL, so they hired me to take over. So the project is hosted on a dedicated FreeBSD-server, and I need to get all sftp-accounts and change them. How do I do that? I have root-access with PuTTY, and I know the basic commands, but I don't know where to start looking for account-settings. Is there anyone who knows how to do this?

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Even if you asked helped from a company doing that work, what changes they have done to your servers? which options they changed?

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