Comments on Securing the CentOS Server with Bastille and PSAD

Securing the CentOS Perfect Setup with Bastille. This article shows how to secure a CentOS server using psad, Bastille, and some other tweaks. psad is a tool that helps detect port scans and other suspicious traffic, and the Bastille hardening program locks down an operating system, proactively configuring the system for increased security and decreasing its susceptibility to compromise.

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This is a bit out of date now - PSAD is in version 2 and Bastille is now Bastille-UNIX version 3.  Check the sites to download the latest versions.

I had a few problems getting these installed as CentOS 4.6 kept reporting that  libc.so.6(GLIBC_2.4) and rtld(GNU_HASH) weren't installed.  I wonder if this is due to use of yum to install things?

Regarding ssh - if you are copying and pasting authorized_keys strings from PuTTY Gen on Windows, make sure that you remove any newlines from what you paste.  These newlines will cause ssh to kick you out before you get a chance to login!