| To: | qmail@list.cr.yp.to |
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| Subject: | Re: Advanced tricks I use to get rid of spam using MX 4xx |
| From: | Michael Sierchio <kudzu@tenebras.com> |
| Date: | Wed, 29 Nov 2006 14:23:30 -0800 |
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Charles Cazabon wrote: Don't the BSD and Linux networking stacks let you do this with the netfilter stuff? I'm sure they let you pass packets to a userspace application for accept/reject/drop or more complex processing. Yes, the IPFIREWALL/ipfw on FreeBSD has the concept of a DIVERT socket, in which a packet is passed to a userland daemon for processing and reinjection into the ruleset. */natd*/ is implemented this way. |
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