https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6075
--- Comment #25 from AXB <[email protected]> 2009-03-03 04:11:17 PST --- (In reply to comment #24) > Btw, I have another hypothesis why your original queries to ISP may be > failing. > You have 2 Gbps links from your host - but do you have gigabit connectivity > all the way to your service provider? If your uplink is thin, you should have > some traffic shaping with reasonable buffer size on your device sitting just > before a bottleneck link - usually a firewall or a router. If this is some > dumb device, your queries may have been victims of tail drop in a switch. > Note that SpamAssassin made 29 queries in rapid succession, all within 22 > milliseconds. A solution in such scenario would be to turn on traffic > shaper on firewall/router or on your host where SpamAssassin is running. > But never mind, the solution with a caching name server within your > own network is much better. FOR THE RECORD: Some Zyxel DSL/firewall devices have a built in "throttling" feature with minimal settings which cannot be disabled and will drop high UDP traffic to the outside. Also seen on some other consumer type CableTV modems and cheapo hardware. a burst of simultaneous DNS queries will trigger the block/drop, erratically and its not easy to debug. -- Configure bugmail: https://issues.apache.org/SpamAssassin/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.
