Port 5000 doesn't work. Tested with many IPs
Xpoolx and port 5000 works quite nicely for me. Also, within the last 30 minutes, I solved a couple of blocks on gpupool.com, which also works ok.
The problem may be on your side of things?
It seems that my internet provider has problems with NAT on some ports. The strange thing is that sometimes it goes but other not!