looks like a dwarf bunny. black and white in color how can I rid it of Fleas as I cannot get close because it's feral.
Unlike cats; released domestic rabbits, transition back into domestication very well. As I write this there is a rabbit sleeping on my bed, who was released in to a neighborhood a few years ago. Domestic rabbits do not do well in the wild.
The very best thing you can do is capture the bunny and get it into the local shelter system. See One of my three pet bunnies jumped out of the hutch and we can't catch her for some ideas to catch the rabbit. Depending on where you live there may be a local rabbit rescue who can assist.
Once the rabbit is caught it can be treated with something like Revolution which will also treat other parasites.
The rabbit can then go on to live a long and happy life in someones home.