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How to enable ip forwarding on Leopard Mac OS X

2009-01-03 19:53:24

In a nutshell, you need to create a launchd script. Here is mine, which I put in /Library/LaunchDaemons.

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" ""> <plist version="1.0"> <dict> <key>Label</key> <string>com.billo</string> <key>Program</key> <string>/usr/sbin/sysctl</string> <key>ProgramArguments</key> <array> <string>sysctl</string> <string>-w</string> <string>net.inet.ip.forwarding=1</string> </array> <key>RunAtLoad</key> <true/> <key>TimeOut</key> <integer>90</integer> <key>WorkingDirectory</key> <string>/var/root</string> </dict> </plist>

That's the hard way.

The easy way is to create or edit /etc/sysctl.conf and add net.inet.ip.forwarding=1