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mandarinx/portforwarding.md

Last active August 29, 2015 14:07
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Port forwarding on OS X
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portforwarding.md

Edit the hosts file

sudo nano /etc/hosts

Add this line somewhere after 127.0.0.1 localhost:

127.0.0.1       your.domain.com

Save and exit (Ctrl + O, Ctrl + X). Flush the DNS cache:

dscacheutil -flushcache

###Port forwarding

Place the following code in /etc/pf.anchors/localhost.dev:

rdr pass on lo0 inet proto tcp from any to any port 80 -> 127.0.0.1 port 3000

NOTE: The trailing line break is required. Otherwise pf will say you have a syntax error.

Next, add two lines to /etc/pf.conf to load your new rule. It is important where these lines go. Add this line right after rdr-anchor "com.apple/*":

rdr-anchor "localhost"

Add this line directly after load anchor "com.apple" from "/etc/pf.anchors/com.apple":

load anchor "pow" from "/etc/pf.anchors/com.pow"

Again, make sure to maintain the final line break.

Next, reload the rules into pf by running sudo pfctl -f /etc/pf.conf

Finally, enable pf by running sudo pfctl -e

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