IP ADRESS!

HI,
i am abit concerned. can anyone hack into your pc or do anything if they manage to get your IP address>?
i behind a netgear router and zonealarm firewalls.
anyone help?
thanks james
i am abit concerned. can anyone hack into your pc or do anything if they manage to get your IP address>?
i behind a netgear router and zonealarm firewalls.
anyone help?
thanks james