this should do the trick:
http://bitcoin.stackexchange.com/questions/38487/how-to-setup-bitcoind-10-2-for-solo-mining-on-lan-with-bitmain-s3
Altough, it's a lot of work for just 1 antminer S7, you'll need to run at least a rPi with a daemon and make sure the full setup is correct. An alternative would be to use a solo mining pool like https://solo.nicehash.com/
Or join the P2Pool network. It's almost solo mining but with less variance.
You can run a local bitcoin node with P2Pool on the same box and mine direct to that.
I run my own node for my own Miners which allows public access zero fee.
www.ukp2pool.uk if u want to give it a try.