Re: [TCLUG:16949] Sendmail/Linux Help

[Ben Kochie <ben@nerp.net>]

also a tip.. before you nuke a box that has been cracked.. you need to
determin how, so that you can prevent it in the future

Thank You,
        Ben Kochie (ben@nerp.net)

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 "Unix is user friendly, Its just picky about its friends."

On Sun, 30 Apr 2000, Eric F Crist wrote:

> Hey,
> 
> My web server got hacked on Thursday.  I had to do a complete reinstall due to
> the fact that shadow/password and init files were deleted.
> 
> Since I reinstalled linux, sendmail doesn't recognize any users.
> I can send mail from localhost to any users, but I can't send mail to
> myemail@<myhost.com>, as I get errors 550 (Relaying not allowed) and 551
> (Unknown user)
> 
> The other problem:
> 
> Ever since I installed linux, new users show up unexpectedly.  For example,
> It's like someone is going into my server and creating accounts with names like
> reboot, system (UID 0, GRP 0), and other accounts that look legit, but I know
> they're not (Caldera, by default, enters Caldera OpenLinux User in the Name
> field, Unless you change it manually).
> 
> Can someone please help me?
> 
> I don't understand ipchains, and I need help setting up as a gateway.
> 
> I also need to know how to setup sendmail so that it'll accept the correct
> accounts (note: it won't even accept mail for root, postmaster, and
> MAILER-DAEMON)
> 
> If you would like to see the error message, send an email to
> ecrist@ardent-hacker.net. (This is the account I am logged in as usually)
> 
> Thanks
> 
> Eric F Crist
> 
> 
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