In Safari, I get this whiney little notice every 15 minutes that says "Do you really want to stay connected??!!!?"
I looked in preferences for the off switch and can't find it. Where is the off switch hiding?
System Preferences > Network > PPPoE > PPPoE Options > Menu window opens > Un-click box "Prompt every __ minutes to maintain connection" Hope this helps.
Panerai's explanation is right... if you are connected using a highspeed connection over Ethernet... (PPPoE = PPP over Ethernet) but if you are using a phone modem the setting is in
System Preferences >> Network >> Show Internal Modem >> PPP >> PPP Options >> Prompt every __ minutes to maintain connection.