While configuring a Ubuntu 22 server on a AWS g4dn instance, I tried to check the list of firewall through this command in the git bash terminal.
[firewall-cmd --list-all]
I was told by the terminal to install the firewalld using the following command.
[sudo apt install firewalld]
However, installation was interrupted with the message below.
[client_loop: send disconnect: Connection reset by peer]
Once I closed the terminal to restart, my ssh connection gets timeout error as the following.
Terminal Input: [ssh -i KeyPair ubuntu@example.us-east-2.compute.amazonaws.com]
Terminal Output: [ssh: connect to host example.us-east-2.compute.amazonaws.com port 22: Connection timed out].
I have checked the Security group and confirmed that TCP port 22 is still available. It seems that the newly installed firewalld is causing the problem.
How can I resolve this issue?
