Cannot connect using IKEv2 about docker-ipsec-vpn-server HOT 2 CLOSED

@wodo96 Hello! Thank you for sharing the details. Your logs show that the VPN server is running normally, but connection requests did not reach the VPN server. So the issue is likely on the VPN server side. Try a different hosting provider, or try setting up the VPN server without Docker.

If you are running the VPN server on your home network, for example, on a Raspberry Pi, make sure that you forward both 500/udp and 4500/udp on your router to the Raspberry Pi's local IP. Note that if your router uses DHCP, that local IP can change on reboot, so make sure you forward to the correct IP.

In some cases, your ISP might use e.g. CGNAT, which prevents direct connections from the public Internet to your router's public IP. Some countries block IPsec VPN traffic, you can instead try e.g. Shadowsocks.

On the other hand, if you are running the VPN server in the cloud, make sure that you open both 500/udp and 4500/udp in your cloud provider's firewall, for example, in your server's security group on Amazon EC2. Not all providers have such a firewall.

from docker-ipsec-vpn-server.

@hwdsl2 Hi! First of all I want to tank you for your fast reply and sorry for my not so fast reply.
By the way I managed to change my ISP and everything works smoothly. I didn't think about my ISP blocking the traffic for an internal VPN server, so your answer really helped me.
I also want to ask you if it is possible to increase the security of the tunnel ikev2 by using a stronger algorithm and make the tunnel like "quantum safe" (I'm doing a project for my university and your work is really helping me!).

from docker-ipsec-vpn-server.