Home / ubuntu / Questions / 656800
Accepted
Mike
Asked: 2015-08-06 02:50:27 +0800 CST

How to find port of a network scanner for UFW

  • 772

Samsung multi-functional device SXC 3205w works perfectly with my Ubuntu 12.04 and I can scan and print over network, but only when firewall is disabled.

How can I find out which port to enable in UFW to make this printer work and have my firewall enabled?

firewall

1 Answers

  1. Best Answer

    You can use fallowing command to trace communication between pc and printer

    sudo tcpdump -i interface | grep ip_address_of_printer

    You will see output of network communication, protocol, port ...

    After that you can set ufw

    Another way is to use command

    netstat -atu | grep ip_address_of_printer

    With this command you will see active connection between pc and printer.

    Also you can allow all trafic for printer ip address

    sudo ufw allow from ip_address_of_printer
    • 2