[Trisquel-users] Internet configuration

[niyaschirayakuth]

I'm using trisquel 4.5.1 . I want to use LAN connection provided by  
university . For that i have to configure ipv4 setting manually. How can i do  
that ? I have tried the edit connection option present in network manager.  
But the apply button remains disabled even after adding ipv4 settings  
manually. Can anyone help me?