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On Tue, Feb 10, 2004 at 01:51:51AM +0100, Christian Schwede wrote: |
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> |
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> Right. But this still isn't that useful - for watching binary files it's |
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> ok, but you wouldn't recognize changes to config files etc. |
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I am using a homegrown script that mails all sorts of important |
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snapshots to another server. MD5's of executables, list of setuids, |
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config files, etc. Some every hour, some every night. |
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The receiving server compares all these mails to their previous |
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versions, and alerts me to any differences. |
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After some tuning and tweaking, there are still several false alarms |
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every day, but I have learned to read them and discard most of them as |
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harmless. |
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I think it is important that the "correct" values are on a different |
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machine, so that they should be safe under eventual attack. Of course I |
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see that a qualified attacker could modify the mail script to always |
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send the same "correct" mails, but then I would nt get any false |
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alarms... He can't know how much differences I expect. |
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I am not sharing the scripts, as they are easy to write, and need to be |
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customized to every installation. But the idea is hereby given freely |
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for anyone to use. |
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-- |
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Heikki Levanto LSD - Levanto Software Development <heikki@×××.dk> |
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-- |
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gentoo-security@g.o mailing list |
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