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OpenVPN not working
Posted: Wed Aug 27, 2025 9:35 am
by Yash_SCx
I have a SoftEther VPN server setup with a virtual hub. I am able to successfully connect to this server using the SoftEther Client, however when I try to use an OpenVPN config file to try and connect to the server it always fails and gives me a "Request timed out" error. I have attached the openvpn config file to this post. Any help I can have is appreciated.
yash-scx_openvpn_remote_access_l3.txt
Re: OpenVPN not working
Posted: Wed Aug 27, 2025 10:07 am
by solo
The same story here
viewtopic.php?f=7&t=69614#p103283
...and your server does not respond with OpenVPN signature.
Code: Select all
echo "\070\001\000\000\000\000\000\000\000" | ncat -uv -i 5 vpnxxx.softether.net 443 | cat -v
...
Ncat: Idle timeout expired (5000 ms).
Re: OpenVPN not working
Posted: Wed Aug 27, 2025 10:18 am
by VincenzoVenuto
Have you try on a different port?
On my VPNserver i use different port for Softehter Client (port 5555) and OpenVPN client (port 992)
Re: OpenVPN not working
Posted: Wed Aug 27, 2025 10:52 am
by Yash_SCx
solo wrote: ↑Wed Aug 27, 2025 10:07 am
The same story here
viewtopic.php?f=7&t=69614#p103283
...and your server does not respond with OpenVPN signature.
Code: Select all
echo "\070\001\000\000\000\000\000\000\000" | ncat -uv -i 5 vpnxxx.softether.net 443 | cat -v
...
Ncat: Idle timeout expired (5000 ms).
Thanks for the response solo, however, I am unsure as to why my server does not respond with OpenVPN signature, my "Enable OpenVPN Clone Server Function" is on for both ports 443 and 1194. I have ensured that the "Routing and Remote Access" service on my server machine is not running either. Also, I haven't enabled SecureNAT.
Re: OpenVPN not working
Posted: Wed Aug 27, 2025 11:04 am
by Yash_SCx
solo wrote: ↑Wed Aug 27, 2025 10:07 am
The same story here
viewtopic.php?f=7&t=69614#p103283
...and your server does not respond with OpenVPN signature.
Code: Select all
echo "\070\001\000\000\000\000\000\000\000" | ncat -uv -i 5 vpnxxx.softether.net 443 | cat -v
...
Ncat: Idle timeout expired (5000 ms).
How do I disable NAT-T in my SoftEther Client software?
Re: OpenVPN not working
Posted: Wed Aug 27, 2025 11:07 am
by solo
Check "Disable NAT-T" next to the port number field.
Re: OpenVPN not working
Posted: Wed Aug 27, 2025 11:37 am
by Yash_SCx
solo wrote: ↑Wed Aug 27, 2025 11:07 am
Check "Disable NAT-T" next to the port number field.
I can confirm now that I am unable to connect to the VPN Server with NAT-T disabled using the SoftEther Client. Is there anything I can do to fix this so that I can use an OpenVPN configuration file?
Re: OpenVPN not working
Posted: Wed Aug 27, 2025 11:45 am
by solo
Unless your port forwarding is flawed, there is nothing else you can do about it.