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What is the recommended way of doing packet filtering in
I have tried IPF, PF and NPF, and can't get any of them to work
I just want to run NAT on IPv4 and to block everything except a small
list of ports from outside on both IPv4 and IPv6, I can't believe this
is all that unusual.
I have native IPv6, so both protocols are using the same external
interface if that makes a difference.
IPF seemed to work ok until the update to 5.1.1. After this I was
unable to get IPv6 to work while still blocking most IPv4 ports.
PF allows traffic from outside to connect to sshd, even though I have
not opened up that port. It also randomly hangs up connections and
generates "in_cksum: out of data" errors on the firewall machine,
Google seems to cause this the most often.
NPF generates a core dump if I run "npfctl show" and locks up
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