Re: Need some help on security

From: Robert Watson (
Date: 01/11/04

  • Next message: Devon H. O'Dell: "BSD-licensed IDS/IDP Software?"
    Date: Sat, 10 Jan 2004 21:47:47 -0500 (EST)
    To: David Edwards <>

    On Sat, 10 Jan 2004, David Edwards wrote:

    > Anyway, on to the question, lastnight, the server stopped responding
    > after someone tried to gain access to what looks to be web based
    > printing. I am not familiar with any firewall/IDS solutions and have
    > looked over Snort and IPFW today. I don't want to do IPFW because I
    > don't want to recompile a kernel that works and potentially lose
    > everything I have done so far. Here is a bit of the apache error_log
    > which shows the issue i am refering to:
    > [Sat Jan 10 01:34:04 2004] [error] [client] File does not
    > exist: /usr/home/dbcenter/public_html/NULL.printer
    > [Sat Jan 10 01:34:04 2004] [error] [client] File does not
    > exist: /usr/local/apache/htdocs/NULL.printer

    Well, these log entries are for attempted exploits of Microsoft's IIS, and
    shouldn't be a problem. The error messages can safely be ignored.

    However, the "server stopped responding" bit doesn't sound good. Was the
    web server still running (i.e., Apache processes still present)? What
    does "ps -alx" show? Were there any console messages regarding apache
    stopping, or any error messages in the Apache log about it exiting or
    changing states, as opposed to just file not found errors?

    Robert N M Watson FreeBSD Core Team, TrustedBSD Projects Senior Research Scientist, McAfee Research

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