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Daniyal Javani
Asked: 2015-02-02 03:15:57 +0800 CST

How can I allow ap-hotspot in ufw Ubuntu 14.04?

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When ufw is enable android stuck in obtaining ip address and cannot connect to wifi. I try sudo ufw allow dhclient and sudo ufw allow dnsmasq bot both had ERROR: Could not find a profile matching error. Could you please help me how to allow ap-hotspot?

wireless

1 Answers

  1. From what I can tell

    dnsmasq uses port 53 tcp/udp, as well as port 67/udp

    dhclient by default uses port 68/udp

    So a generic way to get this setup would be 

     sudo ufw allow to any port 53
 sudo ufw allow to any port 67 proto udp

 sudo ufw allow to any port 68 proto udp

    Or if you want to just open these ports for a particular IP address (not sure if you get a static address) 

     sudo ufw allow from xxx.xxx.x.xx to any port 53
 sudo ufw allow from xxx.xxx.x.xx to any port 67 proto udp

 sudo ufw allow from xxx.xxx.x.xx to any port 68 proto udp

    You can also add the entries to /etc/services and then ufw will understand when you try 

     sudo ufw allow dnsmasq
 sudo ufw allow dhclient

    To do so just edit

     sudo nano /etc/services

    Take a look at the file and it pretty straight forward, but basically you will add

     dnsmasq 53/tcp
 dnsmasq 53/udp
 dnsmasq 67/udp

 dhclient 68/udp

    And then 

     sudo ufw allow dnsmasq 
 sudo ufw allow dhclient

    Should work.

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