How to connect to memcached server from outside?

Question

I installed memcached on AWS EC2 Ubuntu, and I can connect it by telnet in the server:

telnet localhost 11211

But how can I connect it from other machine? I know the interval ip is 172.31.17.208, but when I try to connect it from another EC2 by:

telnet 172.31.17.208 11211

the response is

Could not open connection to the host, on port 11211: connect failed.

Harshal Bulsara · Answer 1 · 2016-05-11T06:30:26.357

2

You will need a Public IP/ Elastic IP if you want to access your Memcache from outside of the AWS.

Your internal IP will work within the VPC and not outside of your VPC. I am guessing the another instance that you are trying to access is not in the same VPC. Try pinging your Memcache server from another instance and check if it is resolved using internal IP.

Edit:

Apart from this, you might need to check your security group and make sure the ports are open for incoming connection.

edited May 11 '16 at 06:30

answered May 11 '16 at 05:26

Harshal Bulsara

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Yes I can ping from the other instance and it is resolved using internal IP. – Jeff Tian May 11 '16 at 05:33
Have you check you security group to see if port is open for connection? – Harshal Bulsara May 11 '16 at 05:42
You are right, I need to open a rule in the security group. – Jeff Tian May 11 '16 at 06:22
@JeffTian if it was helpful you can mark as answer :) – Harshal Bulsara May 11 '16 at 06:27

How to connect to memcached server from outside?

1 Answers1