Running ssh on Amazon EC2 instance on port other than 22

Question

I am not able to access Amazon EC2 instance via ssh as i am behind a firewall. So, i thought of running ssh on port other than 22, like 80 or 443.

I tried starting A

Answer 1

To connect to an AWS instance through ssh from a port different than default 22:

1. Open the security group of your instance so that it allows connections to that port from the source that you choose (0.0.0.0/0 for any source).

2. In your instance:

   • It is a new instance you could use an user-data script like this one:

   #!/bin/bash -ex perl -pi -e 's/^#?Port 22$/Port 443/' /etc/ssh/sshd_config service sshd restart || service ssh restart

Please note that this only works if you are launching a new instance:

User data scripts and cloud-init directives only run during the first boot cycle when an instance is launched.

• If it is not a new Instance, edit the /etc/ssh/sshd_config file adding/changing Port 22 to the port that you want (i.e: Port 443) to connect through ssh and then do service ssh restart and you should be done.

Note: I did this with an Ubuntu instance, with another Linux instances may be slightly different.