How to disable IPv4 completely and use IPv6 only LAN?

[kada_harsh]

Hi @experts,

I am new to OPNsense. I need help with below Query.

my home ISP provides and supports IPv4 and IPv6 as shown below,
   Connection-specific DNS Suffix  . : domain.name
   IPv6 Address. . . . . . . . . . . : 2401:4900:1c0f:xxxx:xxxx:xxxx:xxxx:xxxx
   Temporary IPv6 Address. . . . . . : 2401:4900:1c0f:xxxx:xxxx:xxxx:xxxx:xxxx
   Link-local IPv6 Address . . . . . : fe80::f522:d5d3:19c6:e662%12
   IPv4 Address. . . . . . . . . . . : 192.168.1.2
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : fe80::9267:17ff:feb2:2193%12
                                       192.168.1.1

I have installed OPNsense and connected OPNsense WAN to my ISP router. I have configured OPNsense WAN accordingly. I wanted to create an IPv6 only LAN network. For this I have also configured Tayga DNS64 and NAT64 on OPNsense.

Query is, I always get IPv4 and IPv6 address for OPNsense LAN clients. I tried disabling IPv4 DHCP and that did not work.

What is the proper way to completly disable IPv4. What are the steps involved in disabling it. I know I am not doing it in the right way.


Thanks,
Kada

[meyergru]

You would have to disable IPv4 on the LAN interface. But is that even feasible? There are just sooo many devices that still cannot use IPv6....