| PF, The OpenBSD Packet Filter: Building The Network You Need: BSDCan, Ottawa, June 10th 2015 | ||
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pass inet proto icmp from $localnet icmp-type $icmp_types
pass inet proto icmp to $ext_if icmp-type $icmp_types
pass inet6 proto icmp6 from $localnet icmp6-type $icmp6_types
pass inet6 proto icmp6 to $ext_if icmp6-type $icmp6_types
Lets your traffic pass; hides the details of your local net