How do I fix: 🔍 Why This Happens?

The primary cause of the 'Write failed: Connection reset by peer' error is a timeout issue. When an SSH session remains idle for too long, the server will terminate the connection to conserve resources and prevent potential security risks. This can happen when a user runs a long-running command or s

How do I fix: Configuring TCP Keepalive on Ubuntu Server?

Step 1: To enable TCP keepalive on the Ubuntu server, add the following lines to the /etc/ssh/sshd_config file: `TCPKeepAlive yes` and `ClientAliveInterval 60`. Save the changes and restart the sshd service as described earlier.Step 2: This configuration enables TCP keepalive, which sends periodic '

Software⏱️ 3 min read📅 2026-06-15

How to Fix: How to fix SSH error "Write failed: Connection reset by peer" on server side?

Q: How do I fix: 🔧 Proven Troubleshooting Steps Increasing SSH Timeout on Ubuntu Server?

Step 1: To increase the SSH timeout, edit the /etc/ssh/sshd_config file using a text editor. Add the following line at the end of the file: `Timeout 300` and save the changes.Step 2: Restart the sshd service to apply the new configuration: `sudo systemctl restart sshd`. This will ensure that the inc

SSH error Connection reset by peer on server side fix

Quick Answer: Check the /etc/ssh/sshd_config file for the 'Timeout' and 'KeepAlive' settings to increase time limits.

📋 Table of Contents

🔍 Why This Happens
🔧 Proven Troubleshooting Steps
🎯 Final Words

The 'Write failed: Connection reset by peer' error message is typically seen on the server-side, indicating that the SSH connection was terminated prematurely. This issue can be frustrating for users who rely on long-running SSH sessions, as it prevents them from completing tasks or accessing remote systems without interruption.

Fortunately, this problem is often related to server configuration settings and can be resolved by adjusting certain parameters to improve the stability of the SSH connection.

🔍 Why This Happens

The primary cause of the 'Write failed: Connection reset by peer' error is a timeout issue. When an SSH session remains idle for too long, the server will terminate the connection to conserve resources and prevent potential security risks. This can happen when a user runs a long-running command or script without checking the progress or terminating it manually.
Another possible cause of this error is related to network connectivity issues or high latency between the client and server. In some cases, the server might be experiencing network congestion, packet loss, or other issues that lead to premature connection termination.

🔧 Proven Troubleshooting Steps

Increasing SSH Timeout on Ubuntu Server

Step 1: To increase the SSH timeout, edit the /etc/ssh/sshd_config file using a text editor. Add the following line at the end of the file: `Timeout 300` and save the changes.
Step 2: Restart the sshd service to apply the new configuration: `sudo systemctl restart sshd`. This will ensure that the increased timeout is applied to all future SSH connections.
Step 3: Verify that the timeout has been successfully increased by running the command `ssh -v user@server`: If the connection times out, you can adjust the timeout value as needed.

Configuring TCP Keepalive on Ubuntu Server

Step 1: To enable TCP keepalive on the Ubuntu server, add the following lines to the /etc/ssh/sshd_config file: `TCPKeepAlive yes` and `ClientAliveInterval 60`. Save the changes and restart the sshd service as described earlier.
Step 2: This configuration enables TCP keepalive, which sends periodic 'keep alive' packets to maintain the connection. The ClientAliveInterval parameter specifies the interval at which these packets are sent (in this case, every 60 seconds).

🎯 Final Words

By increasing the SSH timeout or configuring TCP keepalive on your Ubuntu server, you can help prevent the 'Write failed: Connection reset by peer' error and ensure smoother long-running SSH sessions. Remember to test your changes thoroughly to confirm that they are effective in resolving this issue.

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