Hello. > In this case, spamdyke would perform 1 additional DNS query (to find the > reverse DNS name).
I found the local RBL approach very very interesting, but once implemented, it did the same as spamdyke. Incidentally, bot connections started to gradually decrease since two days ago, so someone outside realized about the situation. ( or the spammer is reading this list !!! :)). Anyways, thanks to everyone for the input provided. Pablo 2008/5/12 <[EMAIL PROTECTED]>: > In this case, spamdyke would perform 1 additional DNS query (to find the > reverse DNS name). > > -- Sam Clippinger > > > > > On Thu, May 08, 2008 at 07:34:43PM -0500, [EMAIL PROTECTED] wrote: > > > >> As clever as the automatic RBL system is, I would recommend against it > >> until you can figure out why this is happening. If this is due to > >> backscatter, you could end up blacklisting (otherwise) legitimate mail > >> servers. Also, with the kind of load you're getting, I don't think > >> adding > >> rblsmtpd would be an improvement -- adding DNS lookups would just > >> increase > >> the time needed to accept an incoming connection. > > > > In this case, rblsmtpd would only do one lookup, on a local DNS server. > > > > It's not self-evident, at least to me, which of these two is faster: > > > > 1. start rblsmtpd and have it perform a local DNS lookup. If NXDOMAIN, > > start > > spamdyke as normal. > > > > 2. start spamdyke, which does a number of remote DNS lookups regardless of > > whether the sender or the recipient are blacklisted (doesn't it?). > > > > Of course, adding the IPs to spamdyke's ip blacklist is also an option, > > but > > with 70k addresses, I'm guessing lookups will take spamdyke longer than > > rbldns, which uses a cdb. > > > > Andras > > > > -- > > Andras Korn <korn at chardonnay.math.bme.hu> > > <http://chardonnay.math.bme.hu/~korn/> QOTD: > > Floggings will continue until morale improves. > > _______________________________________________ > > spamdyke-users mailing list > > [email protected] > > http://www.spamdyke.org/mailman/listinfo/spamdyke-users > > > > _______________________________________________ > spamdyke-users mailing list > [email protected] > http://www.spamdyke.org/mailman/listinfo/spamdyke-users > _______________________________________________ spamdyke-users mailing list [email protected] http://www.spamdyke.org/mailman/listinfo/spamdyke-users
