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Severe download speed degradation with Radius tunnelall VPN connection normal?

I just completed a Radius VPN connection to my TZ270 unit. I know the merits of split tunnel routing, but want to use tunnelall, due to international needs. But while the connection is functional, the falloff in download speed is huge, whereas the upload speed isn't impacted.  Here's a comparison of the speed results using a regular connection vs. a Radius tunnelall VPN connection.

With my previous Sonicwall (NSA 250), I consistently had download speeds above 4 mbps. Is this falloff to be expected with a tunnelall Radius VPN connection? Does anyone have (or can try) a similar connection that doesn't exhibit this huge a drop-off?

Category: Entry Level Firewalls

Best Answer

    Jeff_LJeff_L Newbie ✭
    Accepted Answer

    I had an extended remote session with a Sonicwall technician, and I now have the answer: A TunnelAll connection for this unit really IS this lousy -- there's no hope for improvement over the second test above. I was expecting the usual dropoff in download speed using VPN, but not to THIS extent. Even a machine with a download speed of over 80 mbps drops to less than 2 with the connection. Split tunnel is the ONLY real VPN option with this firewall. If you're looking for VPN that will allow you to traverse international borders, know that this isn't what you're looking for.


  • Jeff_LJeff_L Newbie ✭

    I neglected to mention that this is a NetExtender connection to a Windows 10 machine. This has been tested on several such machines, and the degradation has been consistent between them.

  • TKWITSTKWITS All-Knowing Sage ✭✭✭✭

    You have also neglected to tell us the firmware version of the firewall.

  • TKWITSTKWITS All-Knowing Sage ✭✭✭✭

    You have to consider what you are doing with the traffic as well as the 270 is the lowest of the low end. If you are utilizing any of the UTM features I can see how the performance is that degraded.

    It's not that it won't allow you to use VPN to traverse borders, it's that you have to know what you are doing with it.

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