Очень похоже на это. У меня тоже 443 не работает и воркеры поотваливались и не подключаются.

2013-05-31 10:38:22: Running command: poclbm.exe user:pass@pool.itzod.ru:3333 --device=0 --platform=0 --verbose -r1 -v -w 128 -f 20
2013-05-31 10:38:22: Listener for "0_itzod.ru" started
2013-05-31 10:38:24: Listener for "0_itzod.ru": pool.itzod.ru:3333 31/05/2013 10:38:24, checking for stratum...
2013-05-31 10:38:24: Listener for "0_itzod.ru": pool.itzod.ru:3333 31/05/2013 10:38:24, started OpenCL miner on platform 0, device 0 (Cypress)
2013-05-31 10:38:45: Listener for "0_itzod.ru": pool.itzod.ru:3333 31/05/2013 10:38:45, no response to getwork, using as stratum
2013-05-31 10:38:50: Listener for "0_itzod.ru": pool.itzod.ru:3333 31/05/2013 10:38:50,  timed out
2013-05-31 10:38:51: Listener for "0_itzod.ru": pool.itzod.ru:3333 31/05/2013 10:38:51, IO errors - 1, tolerance 2
2013-05-31 10:38:56: Listener for "0_itzod.ru": pool.itzod.ru:3333 31/05/2013 10:38:56,  timed out