software/!RELEASES/ircservices/achurch.org/services/lists/ircservices/2002/002948.html

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  14    <H1>Proxy scanning (was RE: [IRCServices] Another Feature Suggestion)</H1>
  15     <B>Russell Garrett</B>
  16     <A HREF="mailto:ircservices%40ircservices.za.net?Subject=Proxy%20scanning%20%28was%20RE%3A%20%5BIRCServices%5D%20Another%20Feature%20Suggestion%29&In-Reply-To=Pine.LNX.4.44.0205310256090.2453-100000%40vector.chocobo.org"
  17        TITLE="Proxy scanning (was RE: [IRCServices] Another Feature Suggestion)">rg at tcslon.com
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  19     <I>Fri May 31 12:18:01 PDT 2002</I>
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  34 <PRE>&gt;<i> Since Services 5 will (or at very least could, given
  35 </I>&gt;<i> coding for a module)
  36 </I>&gt;<i> sport global Z: line management, would it make sense to
  37 </I>&gt;<i> have it send a
  38 </I>&gt;<i> message so that it adds your desired Z: line to Services?
  39 </I>&gt;<i> Or should one
  40 </I>&gt;<i> collect up the accumulated Z: lines on the respective
  41 </I>&gt;<i> servers BOPM is
  42 </I>&gt;<i> running on and manually add them later?
  43 </I>
  44 The only problem with this is the single-point-of-failure problem: If
  45 someone DoSes your Services server, or the services hub off, then the
  46 point of having a seperate proxy monitor on each server is defeated,
  47 as they can't submit their z:lines.
  48
  49 The most resilient solution, at least with BOPM, is to get each
  50 individual BOPM bot to submit by e-mail to blitzednet's DNS blacklist
  51 (you have to e-mail them to set this up, but it's very efficient) -
  52 all the other BOPM proxy monitors on your network and everywhere else
  53 will then pick compromised hosts up almost immediately using the
  54 blacklist lookup, without having to scan. This removes the
  55 single-point-of-failure problem (well I suppose someone could still
  56 DoS the blacklist server, but that would only slow down the k:lining
  57 of proxybots - if you're that paranoid you could use your own
  58 blacklist server).
  59
  60 Russ Garrett
  61 <A HREF="http://www.ircservices.za.net/mailman/listinfo/ircservices">russ at garrett.co.uk</A>
  62 www.faereal.net
  63
  64
  65 </PRE>
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