telnet stratum.50btc.com 8333成功，但telnet stratum.50btc.com 3333失败，为什么

[limingz]

telnet stratum.50btc.com 8333成功，但telnet stratum.50btc.com 3333失败，为什么？

stratum.50btc.com 3333 服务器端肯定是OK的，为什么作为客户端telnet不到呢？

Failure: stratum.custom_exceptions.TransportException: SocketTransportClientFact
ory connection timed out

[servicelabs]

这两天50btc老有问题，已经切换到别的矿池，不用它了！特别是点支付时，老是没反映！
我这里telnet是正常的，见以下返回信息！
{"id":"0","method":"mining.notify","params":["1631","56C045FA0F59C745BB38BC18FA9
6B4618D76A1DA942575A30000000700000000","0100000001000000000000000000000000000000
0000000000000000000000000000000000FFFFFFFF3B03B7DC030004328754190400000000522CF A
BE6D6D0000000000","0048692066726F6D2035304254432E636F6D2039AC1EEEED88FFFFFFFF011
5067496000000001976A914BFD9C318852CA57A563786E67BB4D0A20B1D8F6788AC00000000",["9
32a86c87bf0b359b101715feb6ec776ff153a0faae9cdfabb11fb82f17bf61d","cbb003dd5a0818
16d45964e0bc901341172ea487e2db2564a62fff079afbf43f","4d466b795af83dff02a459007b9
8a9d941f5dff23c80f798f3a02f50e76cdff4","c87db29424bdf74cf33553f2a0e803bf6e26e082
02dfaa8be06bfaa989061e77","03fd7f6eb9fa0804a4f0746be2b72e2024b9f3639dcca825e0edf
a012092797d","bbdbdeac467e6e631ee10f320a19ffad37af0c1e01302fb8dce41d10d43ee96c",
"8283345012a637e578301bf74e92428f90764fc508bfdf0a8b1c6b8f1f5bc284","a8ffae2883c8
3df3ad4ab378ffe5fc59933bc4c2b918672cd5e63e65749a85ad","629fe12e62efa6397e47dabce
33266b5e9a11a948eb87a795fac5fdcd70b5dad"],"00000002","19548732","5212c0dd",false
]}