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Copper Contributor
Copper Contributor
Posts: 12
Registered: ‎06-17-2022

Re: IPv6 Fios Fresh Tomato and Ubuntu Linux


This is a summary of the above, so I could mark it as a solution.


I'm currently running FreshTomato 2022.3
In Basic-IPv6
IPv6 Service Type DHCPv6 with Prefix Delegation
Prefix Length - 56
Request PD Only - Check this
Add Default route - Uncheck this
Static DNS - Leave blank
Accept RA from - WAN only
If you have more than one vlan, you'll see the option to include it here.


In Advanced-DHCP/DNS
Announce IPv6 on LAN (DHCP)
SLAAC works too, but has security issues.


Go back to the Overview.
You should see a IPv6 address in LAN that does not start with fe80 (Link Local)
In the DC area it starts with 2600. It will not show on WAN.


In Ubuntu Linux
In Settings, Network, Wired, click the gear, IPv6
Check Automatic and apply. (Auto-DHCP only, works too)
Bounce (turn off and on) the interface.
Click the gear again.
It should show an IPv6 address that does not start with fe80 (Link Local)
Note: IPv6 seems to take about a minute, so if it doesn't immediately work, wait a minute and re-open the Details window.


Chrome browsers.
Basically there is nothing to change in Chrome, it just defaults to on.


Firefox still has IPv6 settings.
*Remember, don't mess with settings if you don't know what you're doing.

That said, enter 'about:config' into Firefox and accept the responsibility.
search for ipv
This will show you all the IPv4 and IPv6 settings. (mine has 6)
I have mine set this way.


network.dns.disableIPv6 -->False
network.dns.ipv4OnlyDomains -->False -->False
network.notify.IPv6 -->True

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