Quote:
Originally Posted by e1-531g
...I recall Gmail also have not accepted mail sent by other server (different domain) via IPv6 protocol...
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Most of my incoming Gmail arrives via IPv6. They appear to prefer it to IPv4 when available.
Both ICMPs are state-managed by PF, so stateful tracking options are available to rate limit them, such as:
Code:
pass proto {icmp icmp6} keep state (max 5000)
I haven't needed this, so far.