Here's a subtle gotcha for OS X users of openssh ... It seems that using 'localhost' in port forwarding requests (i.e. ssh -R 1234:localhost:1234) leads to an IPv6 interpretation of the localhost, which results in errors ...
Specifying '127.0.0.1' instead forces IPv4, and therefore a better chance of success ... http://msgs.securepoint.com/cgi-bin/get/openssh-unix-dev-0312/97.html -jim
