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How can I keep updated of changes to the range of IP addresses that Amazon will use for EC2 instances. I want to add a range of IPs to my firewall settings to allow access to my 'ground based' mysql database from instances started by my autoscale policy. As i understand each instance will have an IP address that will be in this range? is this correct?

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Amazon have published this - forums.aws.amazon.com/ann.jspa?annID=935 – undefined Mar 30 '11 at 22:18

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This question has been answered before, but here is the link to the forums, select the sticky link to the list of Ip ranges used by Amazon, it gets updated reliably when they add new information.

EDIT: Changed link, whenever the post is updated the link breaks, so just gave a static link to the forum page with the sticky, should be safer.

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The link no longer leads to this info – undefined Mar 25 '11 at 15:52
Thanks, fixed it to be more durable. – Flashman Apr 6 '11 at 14:29
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Thanks, the legions of idiots at amazonaws are scraping terabytes of data from us, it is a black hole of awfulness. Every website should block the amazonaws IP range by default. – soupagain Sep 11 '12 at 11:27
Just to supplement this, if you want a parsed list of the above URL, use wget -qO - https://forums.aws.amazon.com/ann.jspa?annID=1701 | grep -Eoh "[0-9.]+{4}/[0-9]+" – sonassi Mar 22 at 16:38
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A later list, published in 2012: https://forums.aws.amazon.com/ann.jspa?annID=1528

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