Home Security CCTV

Apologies if this is in the wrong section perhaps one of the mods could move it to the correct section.
I would like to put a security CCTV camera in my porch but I do not have a power socket into which I can plug my camera into if it needs power. I have been looking at the POE IP security cameras so that I could avoid having to plug the camera into the mains. I have a sensor light in my porch which comes on when you come into the house from outside. I wondered if the power source for this could power the camera in any way? Is it possible to connect the Poe camera to an Ethernet cable and have the other end connected to a Homeplug so that it is connected to my home network and possibly powered or would I need to use POE switch to power the camera?

I doubt Poe would work over a home plug as Poe utilises the spare cables in cat5 that will be ignored in a home plug. You will have to run a cat5 cable to the camera in any case so Power Over Ethernet Adapter Injector Extractor Passive POE KIT CAT5 Cable | eBay would solve your issue. This would work for a single camera but if you have an nvr with a Poe switch built in would not be required.

I had a CCTV installed a few years ago by a cowboy type of an installer who set up a four channel DVR with all my cables going to the back of the house. I think my best option as you mentioned is probably getting one long Ethernet cable from the front door of the house to the back and probably changing the DVR to an eight channel DVR to accommodate the extra camera.

I ran a CAT5 cable along the outside of a house I used to rent.. as I didn't want the hassle of trying to contact the landlord for permission. The cable ran outside the bedroom (there was already a hole there for an internet connection). Around the whole side of the house and into the sitting room where the Ariel come came in. Worked perfectly for 2 years while I was there.. no loss of signal, even if the Irish weather. Saved a lot of hassle with doing it inside.

People here are talking about two different things....
There is POE which is an official standard and it works in the same way that Ethernet over the mains work.... the supply is added to the network setup and this runs at 48v normally and you need ideally injectors and extractors or a poe hub and camera.... what people here seem to be talking about is that on a standard 100/10 Ethernet setup there are only 4 wires used and thus there are 4 not used wires on a standard cat 5e cable. Now you could use that set of 4 to make 2 pairs for carrying power.
I have cctv around my house and initially I did do this and it does work well but has its limits - mainly cat 5e cable is jolly small and so long distance causes voltage drop and problems.

Personally I would get a feed from your light, drop it to 12v and supply the camera directly... If you wanted you could have a 12v transformer plugged into the pass thru on the home plug and run this lead with the Ethernet lead to give the power.

the official POE 48v things are fine if the camera is compatible if not its a ballache getting the voltage down from 48v to 12v.

hope that makes sense!