OOOOPS.... I'm sorry - I thought we were on the Internet Filtering thread... please ignore my comments about the "original post"...
Shawn On Friday 09 September 2005 14:14, Shawn wrote: > Yep, RBL's help with spam via email. However, the original post was > looking for tips on filtering web access. The other suggestions regarding > squid and dans guardian, as well as IPCop with the addons are well on > track... > > Filtering mail seems to be a hit and miss thing. I do use RBLs, and > spamassassin/antivirus, but I'm still getting a fair bit of spam, that > isn't tagged as such. When I check the logs, I can see that the RBLs are > being used and blocking some traffic, and some spam does get tagged... but > it's going to be an on-going battle... maybe we should plan a workshop on > spam filtering? I know I don't have the level of knowledge needed to > "drive" a workshop, but I would most definetly want to attend.... > > My thoughts... > > Shawn > > On Friday 09 September 2005 13:59, Gustin Johnson wrote: > > I have moved away from content filtering. The spammers just change the > > subjects > > and the content. Also CPU utulization grows non-linearly. What we do > > now is check source of the smtp connection, compare that ip against a > > couple of RBL lists, then either reject the connection or continue with > > the transaction. > > > > The upside is that I do not constantly need to tinker with our scripts, > > we see a > > massive reduction in bandwidth utilization (the messages are rejected > > before any > > data is transmitted), and the sender gets a bounceback that aids in the > > correction of a false positive. I know I am getting tired of email > > black holes > > (the U of C was getting bad for this about 2 years ago). > > > > I save content filtering for mail sorting once mail is accepted (sieve is > > awesome btw). > > > > There are of course other perspectives but this approach seems to me to > > strike a > > reasonable balance between facilitating communication (which is what > > email is supposed to used for) and removing unwanted messages. > > > > If interested I can give you a list of currently used RBLs. > > _______________________________________________ > clug-talk mailing list > [email protected] > http://clug.ca/mailman/listinfo/clug-talk_clug.ca > Mailing List Guidelines (http://clug.ca/ml_guidelines.php) > **Please remove these lines when replying _______________________________________________ clug-talk mailing list [email protected] http://clug.ca/mailman/listinfo/clug-talk_clug.ca Mailing List Guidelines (http://clug.ca/ml_guidelines.php) **Please remove these lines when replying
