WIth my online client and with standalone clients, yes. I’ve had friends outside download files from me from my dyndns as well. I changed a few things around and got some interesting log results.
200 PORT command successful.
TYPE A
200 Type set to A.
LIST -al
150 Opening ASCII mode data connection for /bin/ls.
425 Cannot open data connection.
this coming from my server. On the Wii, now it seems to connect fine, but just sits on a blank screen.