SSH connection to ec2 Connection timed out

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http://stackoverflow.com – I cannot SSH in to my ec2 instance from ubuntu 12.11. I tried all the methods of ssh by giving key as credentials I used ssh -v -i ~/.ec2/pes.pem [email protected] and I am getting the output as OpenSSH_6.1p1 Debian-4, OpenSSL 1.0.1c 10 May 2012 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug1: Connecting to ec2-54-209-148-122.compute-1.amazonaws.com [] port 22. debug1: connect to address port 22: Connection timed out ssh: connect to host ec2-54-209- (HowTos)