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 [Guide] OPNsense Unifi setup with ipv6

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Moogle Stiltzkin
post Nov 7 2025, 06:37 PM

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QUOTE(Dothan @ Nov 6 2025, 07:59 PM)
Sorry for late reply.

Under the System -> Interfaces -> WAN:
The IPv4 Configuration Type in the Generic Configuration should be PPPoE.
The IPv6 Configuration Type in the Generic Configuration should be DHCPv6.
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im using dhcpv6 but something is very wrong.

For vlan e.g. guest vlan, when i put DHVPv6 it break the internet. wont work at all. So for guest vlan had to remove that.

what this does, ipv4 works on guest vlan. Only the vlan1 network has working ip6 and ipv4 both.

So i donno why that is.
Moogle Stiltzkin
post Nov 10 2025, 05:36 AM

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QUOTE(Dothan @ Nov 8 2025, 09:30 AM)
I guess you want to isolate guest devices from your usual network with different IP ranges right?

Supposedly the DHCPv6 is getting IPv6 ranges assigned by TM Unifi over PPPoE connection.

Let me research what I can help you.
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i donno why but when i copy the lan DHCP6 in the ipv6 advertisement and stuff to the guest vlan, it made the guest vlan internet partly work

meaning some sites work, while others didn't. so the internet was partly working. it was a mess laugh.gif


so my work around, ipv6 only for lan, and for guest vlan only ipv4. thats the only working setting i got to work.

posted the full story here
https://www.reddit.com/r/TPLink_Omada/comme...erly_on_eap773/


so i'm just wondering, any of u setup any vlans, did your ipv6 go nuts and break the internet? for pfsense with tmnut sweat.gif

i scoured the setting and honestly donno what i did to mess up.

for the ipv6 setting, i copied exact from the private vlan and use same for guest vlan.

only difference is for the ipv4 they use different subnet since on a separate vlan of course.

This post has been edited by Moogle Stiltzkin: Nov 10 2025, 05:43 AM
Moogle Stiltzkin
post Nov 10 2025, 03:41 PM

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QUOTE(Dothan @ Nov 10 2025, 07:38 AM)
Do you setup the firewall rules allowing passthrough of IPv6 traffic from your guest vlan?
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passthorough?

hm...

under firewall rules

for lan, allow both ipv4 and ipv6 for lan subnets.

for guest vlan also same but for guest subnets.


if thats what u meant? hmm.gif

This post has been edited by Moogle Stiltzkin: Nov 10 2025, 03:43 PM
Moogle Stiltzkin
post Nov 11 2025, 09:51 AM

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QUOTE(Dothan @ Nov 10 2025, 05:01 PM)
Yes,  since you mention certain site not reachable from guest vlan.

Try ping -4 and ping -6 on www.google.com from your guest vlan, see which one or both could reach out the respective IPv4 and IPv6 address.
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https://www.reddit.com/r/TPLink_Omada/comme...omment/nls3o3b/

hmm.gif

ipv4 works. ipv6 doesnt.

because as soon as the ipv6 stuff was removed for guest vlan, internet worked for the guest vlan no issue other than no ipv6

This post has been edited by Moogle Stiltzkin: Nov 11 2025, 09:55 AM

 

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