The Norton Smart Firewall should automatically create rules to allow Skype internet access. In case there is a glitch, try this: Exit Skype. Go to Norton Settings > Network > Smart Firewall and click Program Control Configure[+]. Find Skype in the list of programs and click on it to highlight it. Click Remove, Apply and OK. When you start Skype the firewall will recreate rules for it and it should then be able to access the internet.