I'm trying to reproduce without changing anything major first to see if it was a one time fluke or if it is something that is recurring. Of course I did change the pf.conf file by removing these lines:
tcp_services="{ 22, 113 }"
icmp_types="echoreq"
pass in on egress inet proto tcp from any to (egress) port $tcp_services
pass in inet proto icmp all icmp-type $icmp_types
Could any one or more of those lines caused it to lock up?
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