wiki:291-on-slackware-i-get-the-error-cipher-algorithm-bf-cbc-not-found-openssl

Version 1 (modified by Samuli Seppänen, 10 years ago) (diff)

--

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.

Return to FAQ