Comments on: EC2 and IP Addresses http://etbe.coker.com.au/2008/11/06/ec2-and-ip-addresses/ Linux, politics, and other interesting things Thu, 09 Feb 2012 01:09:24 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Justin Mason http://etbe.coker.com.au/2008/11/06/ec2-and-ip-addresses/comment-page-1/#comment-16656 Justin Mason Thu, 06 Nov 2008 15:01:33 +0000 http://etbe.coker.com.au/?p=890#comment-16656 Yes, EC2 is a natural way to deal with "bad weather" in SMTP terms. I've blogged about this in the past: http://taint.org/2006/11/29/005418a.html http://taint.org/2006/11/30/154423a.html fwiw, SpamAssassin nowadays supports this quite nicely, with TLS support in the spamd/spamc protocol, so a scalable cloud of spam-scanners is entirely doable ;) 'Taking a few minutes to assign an IP address is usually no big deal, but having an IP address be unusable for a few minutes while in the process of transitioning between servers would be quite inconvenient.' This is indeed the case, and yes, it's a big problem :( I've had Elastic IPs take 20 minutes to switch fully. Yes, EC2 is a natural way to deal with “bad weather” in SMTP terms. I’ve blogged about this in the past:

http://taint.org/2006/11/29/005418a.html
http://taint.org/2006/11/30/154423a.html

fwiw, SpamAssassin nowadays supports this quite nicely, with TLS support in the spamd/spamc protocol, so a scalable cloud of spam-scanners is entirely doable ;)

‘Taking a few minutes to assign an IP address is usually no big deal, but having an IP address be unusable for a few minutes while in the process of transitioning between servers would be quite inconvenient.’

This is indeed the case, and yes, it’s a big problem :( I’ve had Elastic IPs take 20 minutes to switch fully.

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