Wow, this is really depressing.

I don't know how openvpn does session key negotiation but unless they're
careful they may wind up exposing aes-256's 2^99-level-security related-
key attacks. aes-128 is probably fine for the control channel and
doesn't have the same related-key issues.

Thanks

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https://bugs.launchpad.net/bugs/1379132

Title:
  openvpn has a poor choice of default cipher, and does not negotiate

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