Hi again. I am trying to open port 20 for my ftp connection. I see that tomato opens port 21 by default when we enable the checkbox. Anyway I don't know if my ISP is blocking this port or not. When I add this iptable input : Code: iptables -I INPUT -p tcp --dport 20 -j ACCEPT https://www.grc.com/port_21.htm shows my port closed. If I remove that input the port changes its state to stealth. I have a pppoe adsl connection. Thank you.