Version 1 (modified by 10 years ago) (diff) | ,
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By default, OpenVPN uses the blowfish cipher for tunnel encryption. For some reason, some versions of Slackware have an OpenSSL library built without Blowfish cipher support.
The fix is either:
- Rebuild the OpenSSL library to include blowfish, or
- use the --cipher option to choose a different cipher. The command openvpn --show-ciphers will show the available ciphers. For example --cipher DES-EDE3-CBC will select Triple-DES encryption.