Solving GitHub SSH Connectivity: A Community Fix for Port 22 Blocks

Unblocking GitHub SSH: A Community Solution for Port 22 Issues

For many developers, SSH is the backbone of secure and efficient interactions with GitHub repositories. It enables seamless pushes, pulls, and other Git operations without constantly re-authenticating. However, connectivity issues can quickly grind productivity to a halt, impacting everything from daily commits to the accuracy of your git metrics tools.

A recent discussion on the GitHub Community forum highlighted a common stumbling block: SSH and SFTP connections being rejected by GitHub. User mdziczkowski reported being unable to connect via SSH, despite verifying that their device and ISP weren't blocking the connection. Their goal was to upload project files, including folders (a task impossible through the GitHub UI), from a mobile device lacking Git or GitHub CLI.

The Challenge: Rejected SSH Connections

The core of mdziczkowski's problem, echoed by others in the community, was the outright rejection of SSH connections. While the discussion initially focused on key and agent setup, the underlying issue often lies elsewhere: network-level blocking of the default SSH port.

• Connection Rejection: SSH and SFTP attempts were consistently failing.
• UI Limitations: Inability to upload folders directly via the GitHub web interface.
• Mobile Constraints: Working from a mobile device without Git or GitHub CLI installed, necessitating alternative upload methods.

The Community-Driven Solution: SSH Over Port 443

The community quickly rallied with a practical workaround. As zippynx and SamirYMeshram pointed out, if your SSH connection hangs or times out, it's highly probable that port 22 (the standard SSH port) is being blocked by your network, ISP, or firewall. GitHub provides a solution for this: routing SSH traffic over port 443, which is typically used for HTTPS and less likely to be blocked.

This simple configuration change can restore your ability to push and pull code, ensuring that your development workflow remains fluid and that your team can meet its engineering performance goals without unnecessary friction.

Implementing the Port 443 Workaround

To implement this fix, you'll need to modify your SSH configuration file, typically located at ~/.ssh/config. If the file doesn't exist, you can create it.

Step 1: Edit Your SSH Config File

Add the following lines to your ~/.ssh/config file:

Host github.com
  Hostname ssh.github.com
  Port 443
  User git

Step 2: Test the Connection

After saving the changes, test your SSH connection to GitHub:

ssh -T git@github.com

If prompted, type yes to accept the host key. A successful connection will typically return a message confirming your authentication.

Step 3: Resume Git Operations

Once the connection is established, you should be able to clone, push, and pull normally using your SSH URLs, even if port 22 was previously blocked. This ensures that your Git operations are reliable, providing consistent data for any performance kpi dashboard or git metrics tools you might be using.

This community insight demonstrates how a small configuration tweak can resolve significant connectivity hurdles, ensuring developers can maintain a smooth workflow and contribute effectively to their projects, regardless of network restrictions. For more details, GitHub also documents this workaround here.