Rdr Missing on Yosemite I'm trying to add a rule to my computer which was working on my work computer. strangely enough there's no rdr program on my Yosemite. should I install a particular package to obtain it? 

sh-3.2# rdr pass on lo0 inet proto tcp from any to any port 80 -&gt; 127.0.0.1 port 8080
sh: rdr: command not found
sh-3.2# which rdr
sh-3.2# wtf
sh: wtf: command not found
sh-3.2# uname -a
Darwin sathias-iMac.local 14.0.0 Darwin Kernel Version 14.0.0: Fri Sep 19 00:26:44 PDT 2014; root:xnu-2782.1.97~2/RELEASE_X86_64 x86_64
rdr is part of the packet filter/firewall in OS X and used to configure redirections. You can't run this command directly in the shell but need to edit it into /etc/pf.conf and friends. More details are available via man pf.conf and in the PF FAQ.