Applies to: VisualSVN Server 1.0, 1.1, 1.5, 1.6, 1.7, 2.0, 2.1, 2.5, 2.6, 2.7, 3.0
Symptoms
You may receive the following error message in a web browser when connecting to an outdated and unsupported version of VisualSVN Server:
Google Chrome, Microsoft Edge and other Chromium-based browsers
svn.example.com uses an unsupported protocol.
ERR_SSL_VERSION_OR_CIPHER_MISMATCH
Mozilla Firefox
An error occurred during a connection to svn.example.com. Peer using unsupported version of security protocol.
Error code: SSL_ERROR_UNSUPPORTED_VERSION
Cause
Due to TLS 1.0 and TLS 1.1 deprecation, modern browsers can only connect to servers that support TLS 1.2 or higher. VisualSVN Server supports TLS 1.2 beginning with version 3.2.0. Versions older than 3.2.0 do not support TLS 1.2.
Resolution
You should upgrade the VisualSVN Server installation to a newer version to solve this issue.
Up-to-date versions of VisualSVN Server support TLS 1.2 and TLS 1.3. Upgrading the server to the current version will resolve the issue and web browsers will connect without errors.
See also
KB174: Upgrading to VisualSVN Server 5.0
KB195: Understanding TLS/SSL compatibility levels in VisualSVN Server
KB196: Changes to TLS/SSL compatibility levels related to the deprecation of TLS 1.0/1.1