What are the equivalent of these Linux IPTABLES lines for macOS High Sierra?

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What are the equivalent of these Linux IPTABLES lines for macOS High Sierra?



I am working for fun on a DOSBOX experiment to get Windows 3.11 WFG to connect to the internet through PPP and Trumpet Winsock. So far, with this script (https://github.com/knightmare2600/oldschool/blob/master/WFW/dosbox_ppp.sh) I got it to work on my RPi3 running Raspbian and DOSBOX 0.74, and I could hilariously view the google page (as well as low-bandwidth versions of some pages) on Internet Explorer 5.0! But for this script to work I had to add these lines after enabling ip forwarding:



Allow established connections



iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT



Masquerade



iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE



Now, I want to do the same on my macbook air running macOS High Sierra. But I can't understand how to make the equivalent of these particular 3 lines for macOS. Anyone knows how or can direct me to the way? Thanks in advance.









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