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Prevent access to SSL VPN

AngeloLelieveld
Hi,

Is it possible to restrict SSL VPN Access to specific public IP address? I want to prevent that everyone can setup a SSL VPN to our network.


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  • 0
    Hi Alelieveld, I agree with Scott that there's already good limitation.  You might want to look at two-factor authentication using OTP (One-Time Passwords).  However, there is a way to do what you want...

    Refer to #2 in Rulz.  Create the two following NAT rules, in order:
      No NAT : {Allowed IPs} -> {SSL VPN service} -> External (Address)
    • DNAT : Internet -> {SSL VPN service} -> External (Address) : to {non existent IP}

    Today, my preferred {SSL VPN service} for the SSL VPN is UDP 443.  In any case, you don't want to use the preceding technique with UDP or TCP 443.  In this case, you might want to use 1394 (OpenVPN) or 1443.  Again with preference for UDP because it make the VPN faster.

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
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  • 0
    Hi Alelieveld, I agree with Scott that there's already good limitation.  You might want to look at two-factor authentication using OTP (One-Time Passwords).  However, there is a way to do what you want...

    Refer to #2 in Rulz.  Create the two following NAT rules, in order:
      No NAT : {Allowed IPs} -> {SSL VPN service} -> External (Address)
    • DNAT : Internet -> {SSL VPN service} -> External (Address) : to {non existent IP}

    Today, my preferred {SSL VPN service} for the SSL VPN is UDP 443.  In any case, you don't want to use the preceding technique with UDP or TCP 443.  In this case, you might want to use 1394 (OpenVPN) or 1443.  Again with preference for UDP because it make the VPN faster.

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
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