Messages

1

24.7 Production Series / Re: Double NAT, IPV6 Issue

« on: November 20, 2024, 11:46:42 pm »

In opensense Dynamic IPV6 prefix is not showing up.

If you don't see a prefix delegated to OPNsense, it won't work.

Play with your uplink router settings (eg PD, length etc), mode (dhcpc, slaac etc) and OPNsense WAN interface settings (mode, prefix length, prefix hint, prefix ID)

I think the issue is this. I have a WAN prefix length of 56. The uplink router has a lan prefix of 64, opnsense is connecting to and treating the uplink router as the modem, which has a prefix of length of 64. Thus I won't be able to do a second prefix length of 64 with opnsense. At least that is what I gather from reading.

Here is how it looks (my network stack)

Modem >>> ASUS Router >>> traffic to my roommates devices and my lab (opensense)

My Opensense >>> Mikrotik switch >>> My Devices

I am not sure where in the chain it breaks. Like I just said above my ISP provides a prefix length of 56, the ASUS Router LAN is set to 64 and can't be changed.

Is this the issue? Opensense is teating asus' lan as the modem and thus can't assign ips because the range is longer than 128?

2

24.7 Production Series / Re: Double NAT, IPV6 Issue

« on: November 20, 2024, 09:08:36 pm »

I followed what you said as well as other posts I found on the web. I still can't get it so assign ips to the lan clients. I am able to ping from the opnsense gui ipv6 addresses found on the internet. So DHCP is assigning opensense a ip. I have tried track set for ipv6 in the LAN interface. It will not assign ips. It works when I plug the modem directly into opnsense. So something is not translating or working properly between the asus router and the opnsense box.

DHCP-PD is enabled and so is the Router Advertisement for IPV6. In opensense Dynamic IPV6 prefix is not showing up. I am not sure if it is a misconfiguration with things.

Btw, my ISP is spectrum and all the devices are owned by me. They are not provided by spectrum.

3

24.7 Production Series / Double NAT, IPV6 Issue

« on: November 20, 2024, 05:11:31 am »

So I have been using Opnsense for years, but I have a roommate that talked me into doing a double nat for two routers. He has a ASUS router as the main router and I have my lab behind the opnsense one. The ASUS router acts as a WAN connection for opnsense. IPv4 assigns addresses and is able to connect to the internet. IPV6 does not. I have WAN DHCP6 and LAN set to track WAN. I am wondering what is needed to have ipv6 be functional all the while being behind a double nat.