[BUG] VPN IP address not getting generated in case of IPv6 only envirounment

[fti-rbahalaskar]

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SoftEther version: 4.29
Component: Client
Operating system: Linux
Architecture: 64 bit

Description

In case of IPv6 only environment in linux system, VPN IP was not getting generated by SoftEther, it's getting empty and there is no steps or configuration available to generate IPv6 VPN IP address.

Expected behavior:
In IPv6 only environment in linux system, user able to generate IPv6 IP address.

Actual behavior:
In IPv4 environment in linux system, i'm able to generate IPv4 VPN IP address and VPN interface with the help of SoftEther vpn client command but after switching to IPv6 only environment the VPN IP address is not getting generated instead it shows empty IP but virtual VPN interface is created.

Steps to reproduce

1. Switch to IPv6 only environment in linux system.
2. Run SoftEther vpn client command to generate VPN interface and IP address.
3. Check VPN interface is created or not.
4. Check VPN IPv6 IP address is generated or not.

[PizzaProgram]

Have You tried manually enable the option at "Security Policy" restrictions:

• "Disallow DHCP Server Iperation (IPv4)"

Also maybe enabling

• "Deny Operation as TCP/IP server (IPv4)"

could help. I did not test it ever, so there is a good chance it will not work this way either.

So yes, the DHCP server should be aware of the server's current state of disabled IPv4, so the BUG is valid.
(Actually I hear about this unix feature the first time in my life, so I guess most people did not hear about it either. Also do not really understand the concept of why it would be do any good to disable IPv4 ?)