If I browse to my static IP address, I see a login screen for my vodafone router. This strikes me as invitaion to hackers. Can I disable this exteranl access?
Are you browsing to your Public IP from an external internet connection? Or from within your own LAN?
I don't think this should be happening, there is an option in the router GUI > Advanced Mode > Settings > Remote Assistance. Can you check that is turned off?
++ @Bogemon he should be able to add some further value.