• In OS X, I'm attempting to do screen sharing via the Messages app (aka iChat).  I'm getting varying results of success with different people.  Last one I did, I noticed these ports were being blocked in the firewall log:

    It's blocking those UDP packets from the person I'm chatting with to me when the screen sharing session is initiated.  The session times out & fails.  I'm not sure what firewall rule(s) I'd need to allow this to happen.  I'm also using NAT-PMP, if that matters.

  • Did you ever get this resolved?

  • Start a new thread.  This one is almost 2 years old.