IPV6 VPN

dathing89

Hello world,

does anyone did a IPV6 IPSEC VPN ?

I'm looking for an example or a guide.

Many thank's !

L.

Zyxel_Kay

Hi @dathing89

Could you let us know which firewall model you're using?

If you're using a ZLD-based firewall (USG/USG FLEX/ATP), you can refer to this article for a step-by-step guide on configuring IPv6 IPSec VPN:

https://community.zyxel.com/en/discussion/26925/how-to-configure-ipv6-ipsec-vpn-usg-flex-atp

dathing89

Hello,

Many thank's for your help !

We try to "mount" an ipsec VPN between 2 site over Starlink. This provider use CGNAT router, so 500 and 4500 port are not allowed.

But we discover that Starlink provide IPV6 IP without NAT…

Is it possible to create an IPV6 tunnel with IPV4 Lan on each side ?

Many thank's again

L.

dathing89

Zyxel_Kay

Hi @dathing89

Using an IPv6 tunnel with IPv4 LANs on each side is technically feasible but not recommended due to potential routing issues. The separation between IPv4 and IPv6 stacks can make traffic management and routing complex.