Thank you misterc for explaining. And sorry for my poor explanation. This application is atm a prerelease so only binary. I think it will grow in the future to a deb package and will get a shortcut However you can run it also at user, the script that will be generated from the application uses gainroot to execute iptables. I don't know if you run it the first time as root if it still working as user. It could be that after executing as root at first time that the user don't have the rights to the created directory and script. I will look and report. And sorry for using windows shame on me. For linux I need to install the designer I have only installed the scratchbox environment. @imo you are welcome. I wanted such application too and makes me happy that it is also useful for other people. @D@vIcHoJD good to hear.