Winsock Error 10053: Software Caused Connection Abort

Winsock Error 10053 is a Windows socket error that occurs when an established TCP connection is aborted by the local host. This indicates that the connection was terminated locally, often due to software or network conditions.

Unlike a remote reset, this error originates from the local system, which may close the connection if data transmission fails or is interrupted.

Common reasons for this include

• Antivirus or security software blocking or terminating the connection, especially if the application is not trusted.
• Network issues where the remote host does not acknowledge transmitted data after multiple retries.
• A firewall closing an idle connection after a period of inactivity.
• General network instability or interruptions affecting the connection.

Troubleshooting steps

• Ensure any antivirus or security software allows the application or temporarily disable it for testing.
• Verify network connectivity by pinging the local network and the remote host.
• Use traceroute to identify where connectivity issues may be occurring.
• Check for firewalls or network devices that may be timing out or closing idle connections.

Understanding these scenarios can help diagnose and resolve connection abort issues in TCP-based applications.