How do I set up home security cameras that I can view over the web?

I travel a lot and work away from home a great deal. I would like to set up a security system that I can monitor from the internet. I will need 4 cameras and one will have to have be able to focus on objects 150' away. The other three cameras will have to be able to focus from 0 to 50'. Any information on... show more I travel a lot and work away from home a great deal. I would like to set up a security system that I can monitor from the internet. I will need 4 cameras and one will have to have be able to focus on objects 150' away. The other three cameras will have to be able to focus from 0 to 50'. Any information on the set up, cost and availability of the equipment would be appreciated.
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