DESCRIPTIONifyou look at the postfix-2.0.16-20031231.RELEASE_NOTES you'll get a better idea of what it does. it's very cool, and can do things like statistical baselining to help you get an idea of your servers' load from various sites. it doesn't yet look as flexible as vthrottle, but i did take an idea implemented: list entry expiration. prune the list of older entries (which you may see infrequently) to keep performance up. makes a lot of sense. anvil has a serious drawback, however, in that it cannot currently handle more than one connection at a time (vthrottle is fully thread-safe and can handle it, but requires you to run sendmail). vthrottle has a tool called "vmeasure" which can do that baselining for you to come up with reasonable, flexible whitelists.The Postfix anvil server maintains short-term statistics to defend against clients that hammer a server with either too many parallel connections or with too many successive connection attempts within a configurable time interval. This server is designed to run under control by the Post- fix master server.
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