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Messages - neerdoc

#1
19.1 Legacy Series / Re: IPv6 ping fails on LAN
May 07, 2019, 10:50:30 PM
Awesome!

Now it works perfectly!

I do have new questions though...

If I look at my computer I now have 3 IPv6 addresses on my interface. Why?

  • One that starts with fe80:: which I understand is the local-link-address
  • One that starts with 2001:9b1:ef8: and says "autoconf secured"
  • One that starts with 2001:9b1:ef8: and says "autoconf temporary"

Next question is this: With the "track" setup, all my units gets their IPv6 address from my ISP, correct? If possible, I would like to assign the IPs myself. How would I do that? Would it have worked if I only had used a different subnet for the LAN than what the WAN has?
#2
19.1 Legacy Series / IPv6 ping fails on LAN
May 07, 2019, 09:34:50 PM
Hi,

I am new to both OPNsense and IPv6, so this might be a silly question/problem.

I have an ISP that supports IPv6 (in Sweden). I have a brand new installation of OPNsense (19.1.7). I have selected DHCPv6 as configuration for my WAN and there I have selected:

  • Send IPv6 prefix hint
  • SOLICIT
  • Prevent Release
I can now see in my Dashboard that I get an 2001:<lots of hex>:2d16 address for my WAN. So far I think I'm good. I can also go to the Console in OPNsense and ping 'ipv6.google.com' successfully.

Now the trouble starts... Only way I managed to enable the DHCPv6 service for my LAN was to set a static IP for the LAN nic. So I took the next one 2001:<lots of hex>:2d17. Now the DHCPv6 service was enabled and prefilled with "Available range". So I set the range from 2001:<lots of hex>:2d20 to 2001:<lots of hex>:2dff just to test. I still did not get an IPv6 address for any of my computers on the LAN, but searching this forum I found a post stating that I needed "Router Advertisment" enabled. Enabled it with:

  • Managed
  • Normal
  • Advertise Default Gateway
and suddenly all my computers had IPv6 addresses! Yay!

So, next step was to test connectivity:

  • Tried "ping6 ipv6.google.com" from LAN computer. Nothing. Why?
  • Tried pinging within the LAN, works!
  • Tried pinging the LAN interface on the firewall, works!
  • Tried pinging the WAN interface on the firewall, failed.
  • Started the console in OpnSense again. Ping from Default, works.
  • Ping from WAN, works.
  • Ping from LAN, fails!

I'm stumped. I have been searching for what I'm doing wrong for hours now and I got nothing... The best suggestion I could find was that the firewall somehow blocks it even though the rules indicated it should not. But looking in the firewall logs I only get "PASS" for the ICMP pings going to the firewall, but no one is answering... :-\
Any help is appreciated!