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Austin Songer, CEH, ECSAFlag for United States of America

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Algo VPN: Connectiivity Issues with Windows

I create a VPN Server my company using Algo VPN

The VPN works for MacOS/iOS devices and Android devices, but when attempting to connect via Windows, it will say connected, but no internet.

What could be the issue?


https://github.com/trailofbits/algo
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yo_bee
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When your computer (PC) says no internet most times it is a misconfiguration with the DNS settings on the client.
If you run an IPCONFIG /ALL from command prompt confirm what each network adaptors DNS servers are set to?
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PPP adapter VPN IKEv2:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . :VPN IKEv2
   Physical Address. . . . . . . . . :
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : fd9d:bc11:4020::1(Preferred)
   Link-local IPv6 Address . . . . . : fe80::1%92(Preferred)
   IPv4 Address. . . . . . . . . . . : 10.19.48.1(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.255
   Default Gateway . . . . . . . . . : 0.0.0.0
   DHCPv6 IAID . . . . . . . . . . . : 1543569250
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-23-B9-8E-9B-30-9C-23-FD-88-0A
   DNS Servers . . . . . . . . . . . : 172.16.0.1
   NetBIOS over Tcpip. . . . . . . . : Enabled


Wireless LAN adapter Wi-Fi:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) Wireless-AC 9462
   Physical Address. . . . . . . . . : 
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 10.232.88.40(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.224.0.0
   Lease Obtained. . . . . . . . . . : Monday, February 11, 2019 3:49:04 PM
   Lease Expires . . . . . . . . . . : Monday, February 11, 2019 3:54:04 PM
   Default Gateway . . . . . . . . . : 10.224.0.1
   DHCP Server . . . . . . . . . . . : 10.224.0.1
   DHCPv6 IAID . . . . . . . . . . . : 117756848
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-23-B9-8E-9B-30-9C-23-FD-88-0A
   DNS Servers . . . . . . . . . . . : 75.75.75.75
                                                   75.75.76.76
   NetBIOS over Tcpip. . . . . . . . : Enabled

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David Johnson, CD
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My VPN Server is in Azure Cloud. How would I fix that.
Not user if it is a gateway issue.  My VPN connection does not have a gateway.  Is 172.16.0.1 a valid DNS server that can resolve internet addresses?

I think you need to focus on what ever172.16.0.1 is
If it isn't then why does the VPN work on all other devices besides Windows?
I want to make sure I am not assuming anything, but when you say VPN works for non-Windows devices you are able to access the internet while connected to VPN?
That is correct. The issue only arises from connecting to the VPN on Windows.
I create a VPN Server my company using Algo VPN

Most companies has firewall control on how the routing to the Internet can be made and you cannot override the firewall rules.

Have you contacted your network admin?
I am the IT Admin. I setup everything, It just doesn't work on Windows.
That is a great response.    

Did you setup Split tunneling? This will force any corporate traffic to the VPN and any public internet request outside the tunnel.
If you just connect your windows pc to a mobile hotspot shared by an Android phone or iPhone and check whether it will work or not.