Can't connect to SE server using VPN Azure from certain networks

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farmvpn
Posts: 7
Joined: Tue Feb 04, 2020 10:38 pm

Can't connect to SE server using VPN Azure from certain networks

Post by farmvpn » Tue May 04, 2021 5:21 pm

I have a SoftEther server running on a Raspberry Pi within my home intranet. I do not have a public IP address. These test cases all work fine:
1) a direct connection to my server from Linux clients in that same subnet using the server's private IP
2) a connection to my server from Linux clients in that same subnet using VPN Azure and DDNS
3) a SoftEther client on a Windows computer on my employer's remote intranet (again, no public IP) using the VPN Azure service/DDNS
4) an SSTP connection from my Android phone to my server while disconnected from my local WiFi, again without a public IP and using VPN Azure/DDNS

I have additional Raspberry Pi's on a remote intranet. These also do not have public IPs so I am currently connecting to them via Logmein Hamachi. I would like to be able to connect them to my home intranet using the SoftEther server instead. I have configured their SoftEther clients identically to the working Linux clients using vpncmd, but the connection status never changes from "Connecting" after I run AccountConnect. When I check the logs on my server I do not see anything coming from that remote network, so I don't think the clients are able to reach my server using VPN Azure. I confirmed with my local ISP that they are not blocking anything. Cases 1-4 work whether I have my firewall disabled or not. Are there any other settings I can try on my remote Raspberrys, or is it likely that the remote ISP is blocking something?
Thanks for any ideas.

farmvpn
Posts: 7
Joined: Tue Feb 04, 2020 10:38 pm

Re: Can't connect to SE server using VPN Azure from certain networks

Post by farmvpn » Sat May 08, 2021 1:55 am

Oddly enough, if I directly specify the same public IP address that VPN Azure would point to, then I can connect clients to my SoftEther server from the remote intranet that doesn't otherwise work using VPN Azure. I still don't understand why VPN Azure doesn't work for clients connecting from just that network.

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