Tweaking Reputation Parameters

Georg Graf georg.graf@wu-wien.ac.at
Mon, 19 Sep 2005 10:23:44 +0200


Hi there,

A Report of my reputation experiences:

At first I ran dcc with -t rep,10. This yielded lots of false
reputations positives. Quite some of them had reputations of 50% and
above. 

Then I switched to -t rep,80. This went quite well for 2 weeks or so.
Today I again got a false positive. One of them that hurt ;(

Here we go:

||  ### end of message body ########################
||  DCC Reputation-->spam
||  
||  X-DCC-wuwien-Metrics: samantha.wu-wien.ac.at 1290; bulk rep Body=many
||          Fuz1=many Fuz2=many rep=84%
||                              reported: 11              checksum  server
||                         IP: 9f5d8e4e ff6f2dd0 0340200b 4112e97b
||                   env_From: b6bc4569 7f6ddb23 b4a47d04 fac3ca9d
||                       From: 2922251f 95a0d50f 9c6db2b9 d578cf63
||                 Message-ID: eecdbde7 95ad4423 7ea086f8 243e776d
||                   Received: 76286203 9d782434 a0e824ef 57a454b0
||                       Body: 501894b5 cd8a5f8e 7306f4f9 c63e3693       0
||                       Fuz1: fc304a1c d50b8239 00162693 c59e687c       0
||                       Fuz2: 24ad7f8e e1afd694 62a7062d af7821cc       0
||                  rep-total: 9f5d8e4e ff6f2dd0 0340200b 4112e97b       2
||                        rep: 9f5d8e4e ff6f2dd0 0340200b 4112e97b       0
||  
||  result: accept

Ok. Since without setting rep-total manually, it takes as default
the reject_at value, I think I'll set it to a higher value. But
this is not very logical. Because when I raise the rep-total
value, then I can be even more sure about the correctness of the
reputation value. Hmm. I'm kind of clueless. I'll give this a
try:

||  $ egrep -i '^(dccm|rep)' dcc_conf
||  REP_ARGS="-t rep,90 -t rep-total,1000"
||  DCCM_ENABLE=on
||  DCCM_ARGS="-p inet:25524@samantha -A -W -a REJECT -S Content-class -j 1500"
||  DCCM_LOGDIR=log
||  DCCM_WHITECLNT=whiteclnt
||  DCCM_USERDIRS=userdirs
||  DCCM_LOG_AT=25
||  DCCM_REJECT_AT=50
||  DCCM_CKSUMS=
||  DCCM_XTRA_CKSUMS=

regards,

  George

--
Vienna University of Economics and Business Administration
Central and Internet Services Section
Center for Computer Services
UNIX Server Administration
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