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What is the IP range of your system so I may restrict access on a firewall?

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We use both Amazon EC2 and Rackspace Cloud for our video processing.
Notification HTTP posts are coming from 67.192.242.205 or 67.192.242.206
API requests are sent to manage.encoding.com at 67.192.243.9

Port Assignments

FTP on port 21
SFTP on port 22
HTTP on port 80
HTTPS on port 443

Amazon EC2 (updated May 2011)

Please refer to AWS forum post https://forums.aws.amazon.com/ann.jspa?annID=1030 for more details.

US East (Northern Virginia)

216.182.224.0/20 (216.182.224.0 - 216.182.239.255)
72.44.32.0/19 (72.44.32.0 - 72.44.63.255)
67.202.0.0/18 (67.202.0.0 - 67.202.63.255)
75.101.128.0/17 (75.101.128.0 - 75.101.255.255)
174.129.0.0/16 (174.129.0.0 - 174.129.255.255)
204.236.192.0/18 (204.236.192.0 - 204.236.255.255)
184.73.0.0/16 (184.73.0.0 – 184.73.255.255)
184.72.128.0/17 (184.72.128.0 - 184.72.255.255)
184.72.64.0/18 (184.72.64.0 - 184.72.127.255)
50.16.0.0/15 (50.16.0.0 - 50.17.255.255)
50.19.0.0/16 (50.19.0.0 - 50.19.255.255)
107.20.0.0/15 (107.20.0.0 - 107.21.255.255) NEW

US West (Northern California)

204.236.128.0/18 (216.236.128.0 - 216.236.191.255)
184.72.0.0/18 (184.72.0.0 – 184.72.63.255)
50.18.0.0/16 (50.18.0.0 - 50.18.255.255) NEW

EU (Ireland)

79.125.0.0/17 (79.125.0.0 - 79.125.127.255)
46.51.128.0/18 (46.51.128.0 - 46.51.191.255)
46.51.192.0/20 (46.51.192.0 - 46.51.207.255)
46.137.0.0/17 (46.137.0.0 - 46.137.127.255)
46.137.128.0/18 (46.137.128.0 - 46.137.191.255) NEW

Asia Pacific (Singapore)

175.41.128.0/18 (175.41.128.0 - 175.41.191.255)
122.248.192.0/18 (122.248.192.0 - 122.248.255.255)
46.137.224.0/19 (46.137.224.0 - 46.137.255.255) NEW

Asia Pacific (Tokyo)

175.41.192.0/18 (175.41.192.0 - 175.41.255.255)
46.51.224.0/19 (46.51.224.0 - 46.51.255.255)

Rackspace Cloud Servers

204.232.192.* - 204.232.207.*
173.203.194.* - 173.203.223.*
174.143.152.* - 174.143.173.*

S3 Storage Access

Almost every corporate firewall will allow outgoing access to the web at ports 80 and/or 443, or via an HTTP/HTTPS proxy. Can you access https://s3.amazonaws.com from behind the firewall? If so, you can access S3 storage.

Localization

For specific access at a corporate location behind a firewall needing an IP range, please try these steps.

1. From a command prompt use dig or nslookup to lookup an IP for s3.amazonaws.com

2. Take the IP you get (I get 207.171.187.117) and run a whois query on it. If you aren't on a system that has whois installed there are several websites that provide it, including Network Solutions at http://www.networksolutions.com/whois/index.jsp

3. On there you will see the range of IP addresses Amazon owns around the IP that you found. So for me, when I whois the above IP the following result comes back:

"Amazon.com, Inc. AMAZON-01 (NET-207-171-160-0-1) 207.171.160.0 - 207.171.191.255"

NOTE: s3.amazonaws.com is a CNAME for s3-1.amazonaws.com and s3-2.amazonaws.com

The two ranges of IPs I see assigned for these are:
72.21.192.0 - 72.21.223.255
207.171.160.0 - 207.171.191.255

You might get completely different IP ranges based on where you are in the world. Just follow these steps to localize.

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