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There you go, I stand corrected.

Are you able to make requests between instances on non-public ports? As someone else pointed out Memcached infrastructure typically won't sit on your local webserver.

Yes, it's pretty easy to set this up with security groups, you can restrict ports to only open to machines within another security group.

So lets say you've got memcached, mysql and a bunch of webservers.

On the memcached security group you open 11211 to the webservers group

On the db security group you open 3306 to webservers

On the webserver group you open 80 and 443 to everyone.


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