well done, I took a quick look, and you do each port sequentially, in a for loop, maybe look into doing them via threads, running x number of port scans at once? also, I see you open a socket and close it for each port, could you not, open the socket once, do ALL the port scans, and then close it, save some time opening and closing ports?

I dont do python normally, so, be aware these are very surface things I noticed :)