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Securing Linux Servers

 
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Joined: 23 Jan 2003
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Location: India
PostPosted: Mon Oct 31, 2005 7:20 am    Post subject: Securing Linux Servers Reply with quote
Here are steps to secure your Linux/FreeBSD servers.

* Disable telnet.
* Limit SSH access to specific IP addresses.
* Disable direct root login.
* Remove unnecessary packages / software.
* Harden the kernel against synflood and basic DOS attacks.
* Remove common user access to compilers and fetching software (wget, fetch, lynx, etc.).
* Ensure /tmp is in its own partition with noexec, nosuid.
* Ensure kernel and software is up to date.
* Remove unnecessary users and groups.
* Install chkrootkit, logwatch, tripwire.
* Install a firewall, and port scan detector.
* For Apache servers, install mod_security and configure for use with FrontPage, PHPMyAdmin, Site Studio, and other H-Sphere applications.
* Secure DNS Servers
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