Back in BackTrack2 ettercap traffic forwarding didn't quite work out of the box so SSL mitm had needed some configuration, this was mentioned by Yeehaw in http://forums.remote-exploit.org/showthread.php?t=99

In BT3 beta its still the same way, it would be nice if those two lines mentioned by Yeehaw were uncommented in the release.

If you don't want to click the link, heres the change to be made in /usr/local/etc/etter.conf
Quote Originally Posted by yeehaw View Post
Code:
# if you use iptables:
#redir_command_on = "iptables -t nat -A PREROUTING -i %iface -p tcp --dport %port -j REDIRECT --to-port %rport"
#redir_command_off = "iptables -t nat -D PREROUTING -i %iface -p tcp --dport %port -j REDIRECT --to-port %rport"
to:

Code:
# if you use iptables:
redir_command_on = "iptables -t nat -A PREROUTING -i %iface -p tcp --dport %port -j REDIRECT --to-port %rport"
redir_command_off = "iptables -t nat -D PREROUTING -i %iface -p tcp --dport %port -j REDIRECT --to-port %rport"
If for some reason those lines were left commented, thats fine too...