Hello forums!

Long story short, recently i've been working in a quite remote area that the only way i can get connected to the web is by using a USB modem.

I use wvdial to connect to the web and have a script placed in my home directory so that i can easily connect to the web by typing
Code:
./internet.sh
in terminal

but since running the script requires sudo, would i still be safe from whatever malicious attack out there? if no, please kindly tell me one or the other way better than my method above.

ps: kppp is not working

thank you