Captive portal. How to add an exception for ftp? Home Page › Forums › Network Management › ZeroShell › Captive portal. How to add an exception for ftp? This topic contains 1 reply, has 0 voices, and was last updated by RDelpopolo 8 years, 9 months ago. Viewing 1 post (of 1 total) Author Posts July 16, 2010 at 4:34 pm #42519 RDelpopoloMember In the captive portal i’ve added an exception for the ports 20 and 21 but the ftp connection to remote server doesn’t work. What I can do? Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.