a102b993db
A Trapit is a fake SMTP server that tries to waste as much resources of a spam-relay as possible - without delivering any mail. Implemented for pf, but might work with other ip filters as well. mail/relaydb is a fine tool to utilize spamd. PR: ports/57365 Submitted by: Max Laier <max@love2party.net>
18 lines
949 B
Plaintext
18 lines
949 B
Plaintext
Tarpits like spamd are fake SMTP servers, which accept connections but don't
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deliver mail. Instead, they keep the connections open and reply very slowly.
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If the peer is patient enough to actually complete the SMTP dialogue (which
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will take ten minutes or more), the tarpit returns a 'temporary error' code
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(4xx), which indicates that the mail could not be delivered successfully and
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that the sender should keep the mail in his queue and retry again later. If
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he does, the same procedure repeats. Until, after several attempts, wasting
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both his queue space and socket handles for several days, he gives up. The
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resources I have to waste to do this are minimal.
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If the sender is badly configured, an uncooperative recipient might actually
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delay his entire queue handling for several minutes each time he connects to
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the tarpit. And many spammers use badly configured open relays
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WWW: http://www.benzedrine.cx/relaydb.html
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-Max <max@love2party.net>
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