How many VPN connections does Alix2D13 support?



  • Hi everyone,

    I am looking to allow some Windows clients to get to our server for RemoteApps via VPN setup on an Alix2D13. What is the maximum number of users I should expect to be supported on an Alix2D13 when it comes to VPN?

    It would be great to see a chart that shows all types of VPNs and numbers supported by Alix2D13.

    Thanks



  • The number of users is pretty much irrelevant.
    What is relevant os how much bandwidth you want to push.

    Search the forum for OpenVPN benchmark.
    (Or google). There are quite some number around.
    From my experience you can push about 10Mbit/s on an LX800.



  • @GruensFroeschli:

    The number of users is pretty much irrelevant.
    What is relevant os how much bandwidth you want to push.

    Search the forum for OpenVPN benchmark.
    (Or google). There are quite some number around.
    From my experience you can push about 10Mbit/s on an LX800.

    I think I got 20-ish Mbit/s with a vpn1411 accelerator card.


  • Rebel Alliance Developer Netgate

    You also need to worry about the number of concurrent connections, which is roughly based on the number of users but matters more with what they run than how many you have.

    One user with bittorrent will need a lot more states than a user who casually surfs the web.

    The ALIX only has 256MB RAM (in most configurations, some have 128MB but they are much more rare to see) so you can't allocate a ton of RAM to handling connections. By default it will take 10% of the RAM for that, so 25000 states. Each user connection takes two states (one into the firewall, one out of it), so that's really 12,500 user connections.

    If everyone's web browsers use ~100 connections (random wild guess) at a time, then you could have 125 users at a time. If they only take 10 connections at a time, you can get away with 1250 users.


Log in to reply