Code:
79.154.133.217 - - [04/Aug/2010:12:46:55 -0700]
"POST / HTTP/1.1" 200 1294 "https://freebitcoins.appspot.com/"
"Opera/9.80 (Windows NT 6.0; U; es-LA) Presto/2.6.30 Version/10.60,gzip(gfe)"
79.146.112.13 - - [04/Aug/2010:12:45:20 -0700]
"POST / HTTP/1.1" 200 1294 "https://freebitcoins.appspot.com/"
"Opera/9.80 (Windows NT 6.0; U; es-LA) Presto/2.6.30 Version/10.60,gzip(gfe)"
81.44.159.81 - - [04/Aug/2010:12:42:20 -0700]
"POST / HTTP/1.1" 200 1294 "https://freebitcoins.appspot.com/"
"Opera/9.80 (Windows NT 6.0; U; es-LA) Presto/2.6.30 Version/10.60,gzip(gfe)"
Those IP addresses all map to Telefonica de Espana. If it was you: give them back, please: 15VjRaDX9zpbA8LVnbrCAFzrVzN7ixHNsC"POST / HTTP/1.1" 200 1294 "https://freebitcoins.appspot.com/"
"Opera/9.80 (Windows NT 6.0; U; es-LA) Presto/2.6.30 Version/10.60,gzip(gfe)"
79.146.112.13 - - [04/Aug/2010:12:45:20 -0700]
"POST / HTTP/1.1" 200 1294 "https://freebitcoins.appspot.com/"
"Opera/9.80 (Windows NT 6.0; U; es-LA) Presto/2.6.30 Version/10.60,gzip(gfe)"
81.44.159.81 - - [04/Aug/2010:12:42:20 -0700]
"POST / HTTP/1.1" 200 1294 "https://freebitcoins.appspot.com/"
"Opera/9.80 (Windows NT 6.0; U; es-LA) Presto/2.6.30 Version/10.60,gzip(gfe)"
Now that 5 bitcoins is worth a fair bit, I'm thinking I need more cheating countermeasures. I can think of four things to try:
1. Rate limit based on the first byte of the IP address (79. or 81. in this case).
2. Rate limit based on the USER-AGENT string ("Opera/9.8..." in this case).
3. Rate limit based on last two domains of reverse DNS lookup of the IP address (rima-tde.net in this case).
4. Make the standard amount given away 0.5 Bitcoins (Bitcoins have gone up 10 times in value since I started the Faucet).
If you get rate limited, you'll get a message that asks you to try again tomorrow.
BitcoinFX: thanks again for the donation to the faucet; I'm going to drain the Faucet below 500 coins temporarily, and will refill it with your donation after the new cheating countermeasures are in place.