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Outbound ports for a firewall for webserver and db server

I have an environment where there is one firewall, and there is a secure segment and a DMZ segment behind it. There is a bunch of servers in the secure segment - DB server, the QA server, etc and ...
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EC2 instance is blocking all outbound connections, how to diagnose/fix?

My EC2 instance is blocking all outbound connections. wget http://www.google.com ==> Hangs ping google.com ==>hangs ssh user@anyserver ==>hangs I ran : sudo iptables -F to eliminate all ...
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iis reverse proxy: one default server and a fall-back

After spending dozens of hours to no avail, I am now asking for help with my IIS issue. I use IIS as a reverse proxy, which provides HTTPS encryption and authentication. The public site is, say, ...