My first OpenVPN, ipv6 issues

[ozzo]

Hi all,

I'm configuring OpenVPN server on OPNSense, I already done it successfully on some linux machines some year back and now it is my first time on OPNSense.

Client connection hangs at:

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2024-09-05 22:26:14: Valid endpoint found: XX.XX.XX.XX:1194:udp
2024-09-05 22:26:14: TCP/UDP: Preserving recently used remote address: [AF_INET]XX.XX.XX.XX:1194
2024-09-05 22:26:14: UDPv4 link local (bound): [AF_INET][undef]:0
2024-09-05 22:26:14: UDPv4 link remote: [AF_INET]XX.XX.XX.XX:1194

In the OpenVPN log I see the following error repeated every few seconds:

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Connection Attempt write UDPv6: Can't assign requested address (fd=9,code=49)

It seems to be the same problem described here: https://www.reddit.com/r/OPNsenseFirewall/comments/1adzr5y/openvpn_setup_instances_getting_ipv6_address_error/
I tried to look for the setting to disable IPv6 in the Instance settings page but I can't find it.

What should I do?

[ozzo]

UPDATE: I was trying to test the connection from within the private network. I tried from outside, both smartphone and notebook connected flawlessly.

Not that it would be useful in any way (at least to me) but, out of curiosity, what should I change to make it work from the inside?

[oxivanisher]

I have the exact same problem. The connection is only not working from the inside and this is only happening since I switched from the legacy server setup to instances. Did you find out anything more?

UPDATE: I was trying to test the connection from within the private network. I tried from outside, both smartphone and notebook connected flawlessly.

Not that it would be useful in any way (at least to me) but, out of curiosity, what should I change to make it work from the inside?