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From: Wojciech Puchar <wojtek@tensor.3miasto.net>
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Subject: ipfw+antispoof breaks IPv6 link local
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can it be solved?

with first rule in my firewall config i have

flush
add 2 deny ip from any to any not antispoof


works fine - as long as no IPv6 link-local communication is needed - 
route6d is an example.

changing it to

add 2 deny ip4 from any to any not antispoof


is using link-local addresses spoofing?!