So every time a new official version of Bitcoin Core is released I try to connect to it to check if solo mining is working with a GPU like in the old days. For that I use the latest version of CGMiner which supported GPU's (v3.7.2) and GUIMiner. This worked fine with all versions up to 0.9.3 with the bitcoin.conf below:

rpcuser=XXX
rpcpassword=XXX
rpcallowip=*
rpcport=8332
daemon=1

From a command prompt, I run Bitcoin-Qt.exe with the -server parameter or bitcoind.exe and can connect and solo mine with no problems.

After upgrading to Core 0.10.0 and reading that it had changed the rpcallowip behavior and wildcards won't work anymore, I made these changes to bitcoin.conf (one at a time) to accept connections from ANY IP (I'm not concerned about security in this particular case):

rpcallowip=::/0

rpcallowip=0.0.0.0/0

I tried those on my local machine and also on a VPS, and neither CGMiner nor GUIMiner could connect to the server. For the local machine I also tried rpcallowip=127.0.0.1, and on the VPS I tried rpcallowip=mycurrentIP with no success either.

CGMiner says "Pool 0 slow/down or URL or credentials invalid" and GUIMiner says "[Errno 10061] No connection could be made because the target machine actively refused it".

Reverting to Core 0.9.3 with rpcallowip=* I can connect to the server and solo mine with no problems. I'm connected to the internet via ADSL with the modem on bridge mode, so port forwarding is not the issue. It would seem that I'm setting rpcallowip wrong, so any help would be appreciated.