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Author Topic: Weird IPv6 problem on OpenBSD  (Read 216 times)


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Weird IPv6 problem on OpenBSD
« on: February 10, 2022, 12:05:55 PM »

I have a question and this seems to be the best place for it. When I build my OpenBSD router for my condo, I fudged up my firewall rules and I was blocking some, if not all ICMP6. I've since fixed things but one symptom that I noticed of the problem was that my network clients preferred to use addresses in the range: 'fdd9:...'. Is this address range a self assigned range like the 169.254.x.y range in IPv4? For those that understand pf, my firewall ruleset lacked a rule to allow all traffic on the internal interface:

     pass on $int_if

I can't imagine what I was thinking when I set this up. Any help towards clarity would be appreciated.


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Re: Weird IPv6 problem on OpenBSD
« Reply #1 on: February 11, 2022, 08:41:10 AM »

Re: fd addresses...

Check out the Unique Local section.