I'm using SecureCRT for mac 8.3.1. I want to dynamic port forwarding to local port, and I also want to allow remote hosts to connect to this local port. So I open "Session Options"--"Port Forwarding"--"Add"--click "Manually select local IP address on which to allow connections"--input "0.0.0.0" into "IP Address"--click "Dynamic forwarding using SOCKS 4 or 5".