Today (1/3/2011) the Windows Azure AppFabric has updated the IP Ranges on which the AppFabric nodes are hosted. If your firewall restricts outbound traffic, you will need to perform the additional step of opening your outbound TCP Ports and IP Addresses for these nodes. Please see the 1/28/2010 “ Additional Data Centers for Windows Azure platform AppFabric” posted which was updated today to include the new set of IP Addresses.
The addition is under United States (North/Central). Value added: 220.127.116.11/21
The Windows Azure AppFabric Team