如何在Mac OSX 做Port Forwarding

在Mac OS X上若想將443Port的Request轉到8443 Port，則可使用以下Command。

Forwaring Port 443 to 8443

echo "rdr pass inet proto tcp from any to any port 443 -> 127.0.0.1 port 8443" | sudo pfctl -ef -

Remove Port Forwarding

sudo pfctl -F all -f /etc/pf.conf

Show Rule:

sudo pfctl -s nat

如果沒有套用成功，可以透過 -s nat 又可以看到有設定值，請 disable/ enable 一次看看。

sudo pfctl -d #disables pfctl
sudo pfctl -e #enables pfctl

Reference:

Mac pfctl Port Forwarding
https://salferrarello.com/mac-pfctl-port-forwarding/

How do I enable IP-forwarding in MacOS X?
https://stackoverflow.max-everyday.com/2017/08/how-do-i-enable-ip-forwarding-in-macos-x/