Applies to: VisualSVN Server 2.5
Subversion clients receive the following error message when attempting to connect to VisualSVN Server:
You may experience the issue if both of the following conditions are met:
- VisualSVN Server has a self-signed certificate applied and
- Subversion client is built against the GnuTLS library.
During the initial setup VisualSVN Server 2.5 generates a self-signed certificate and adds it to the Trusted Root Certification Authorities store on the local machine. To avoid possible security issues, VisualSVN Server makes this self-signed certificate to be valid for server authentication only (by specifying the 'Key Usage' extension). Subversion clients built against GnuTLS don't recognize such certificate and the error occurs.
It's not recommended to use a self-signed certificate in a production environment. We advise to use a certificate issued by your domain or a third-party certificate authority instead of a self-signed one.
If you have to use a self-signed certificate please follow the instruction to generate a cerificate without specifying 'Key Usage' extension:
- Add the following registry value to the Windows registry:
for 32-bit system:
[HKEY_LOCAL_MACHINE\SOFTWARE\VisualSVN\VisualSVN Server] "CreateGnuTLSCompatibleCertificate"=dword:00000001
for 64-bit system:
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\VisualSVN\VisualSVN Server] "CreateGnuTLSCompatibleCertificate"=dword:00000001
- Start VisualSVN Server Manager.
- Go to Action | Properties | Certificate.
- Click Change certificate... and follow the wizard instructions to generate a new self-signed certificate.
The certificate will be generated without the 'Key Usage' extension and will be compatible both with GnuTLS and OpenSSL.