I was testing the latest code in proxy mode which starts up fine and works with my antminers no problem.

[root@localhost ck]# bin/ckpool -Ap -c etc/ckproxy.conf
[2018-09-13 21:37:44.404] ckproxy generator starting
[2018-09-13 21:37:44.404] ckproxy stratifier starting
[2018-09-13 21:37:44.404] ckproxy connector starting
[2018-09-13 21:37:44.407] ckproxy connector ready
[2018-09-13 21:37:44.408] Loaded 2 users and 0 workers
[2018-09-13 21:37:44.408] ckproxy stratifier ready
[2018-09-13 21:37:50.800] Proxy 0:stratum+tcp://us-east.stratum.slushpool.com:3333 connection established
[2018-09-13 21:37:51.415] Successfully connected to pool 0 stratum+tcp://us-east.stratum.slushpool.com:3333 as proxy
[2018-09-13 21:37:51.415] ckproxy generator ready


However, I get the following when a Halong T1 tries to connect to the proxy:

[2018-09-13 21:38:06.435] Temporarily insufficient proxies to accept more clients
[2018-09-13 21:38:06.435] Failed to provide subscription due to no sdata

The T1 will connect directly to slush pool without a problem.