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1Gb/s Site-to-Site VPN Throughput possible with right hardware?

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  • R
    robinjames
    last edited by Dec 5, 2013, 3:17 AM Dec 5, 2013, 2:22 AM

    Hey gang,

    Was just wondering if it's possible to have OpenVPN @ 1Gb/s? We have a 1Gb Virtual L2 connection between our two offices, and we would like to make sure it's secure by using OpenVPN on each end. I have a feeling that the restriction here would be software and not hardware?

    Thanks!
    -Robin

    EDIT: Stumbled upon this while googling tonight: https://community.openvpn.net/openvpn/wiki/Gigabit_Networks_Linux
    if these tweaks were possible in pfSense and I made sure I had an AES-NI capable CPU, I could be on my way?

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    • ?
      Guest
      last edited by Dec 6, 2013, 4:09 AM

      AES-NI is not well-supported on FreeBSD yet.  It's implemented,
      http://www.freebsd.org/cgi/man.cgi?query=aesni&apropos=0&sektion=4&manpath=FreeBSD+8.3-RELEASE&arch=default&format=html
      but due to the way it is implemented, it doesn't give much, if any, boost.

      It's being addressed, but:

      • will likely only hit -HEAD and 10.x (thus pfSense 2.2)

      • will probably take 6-8 months

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      • J
        jasonlitka
        last edited by Dec 6, 2013, 12:12 PM

        @gonzopancho:

        AES-NI is not well-supported on FreeBSD yet.  It's implemented,
        http://www.freebsd.org/cgi/man.cgi?query=aesni&apropos=0&sektion=4&manpath=FreeBSD+8.3-RELEASE&arch=default&format=html
        but due to the way it is implemented, it doesn't give much, if any, boost.

        It's being addressed, but:

        • will likely only hit -HEAD and 10.x (thus pfSense 2.2)

        • will probably take 6-8 months

        Jump mentioned a while back that the AES-NI code in OpenVPN was much better than the cryptodev module and that it would likely be faster if you unloaded it and rebooted.  Is that still the case?

        I can break anything.

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        • ?
          Guest
          last edited by Dec 6, 2013, 11:43 PM

          @Jason:

          Jump mentioned a while back that the AES-NI code in OpenVPN was much better than the cryptodev module and that it would likely be faster if you unloaded it and rebooted.  Is that still the case?

          It's not "much better", it's just the openssl port.  If it doesn't go through the cryptdev interface, then yes, it's probably faster.

          That being true, OpenVPN has it's own performance problems to deal with.  (Read: context switch overhead.)  One way to fix this would
          be to put netmap under openvpn.

          As I said, it's being addressed.

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