I'm hoping someone has already encountered this and has a quick answer. Otherwise I'll do some digging this weekend. I have set up the ckpool on just a clean local server. If I'm reading the error correctly, it's the URL in the ckpool.conf file that's throwing the error when trying to bind to stratum port. I also haven't seen any info on increasing the rcvbufsiz. TIA.
[2017-12-08 12:52:01.802] ckpool generator starting
[2017-12-08 12:52:01.802] ckpool stratifier starting
[2017-12-08 12:52:01.802] ckpool connector starting
[2017-12-08 12:52:01.803] Failed to bind socket for 192.168.1.46:3333
[2017-12-08 12:52:01.803] Connector failed to bind to socket, retrying in 5s
[2017-12-08 12:52:01.962] Failed to increase rcvbufsiz to 532480, increase rmem_max or start ckpool privileged
[2017-12-08 12:52:02.215] ckpool generator ready
[2017-12-08 12:52:02.215] Connected to bitcoind: localhost:8332
[2017-12-08 12:52:02.287] ckpool stratifier ready[2017-12-08 12:52:06.803] Failed to bind socket for 192.168.1.46:3333
[2017-12-08 12:52:06.803] Connector failed to bind to socket, retrying in 5s
[2017-12-08 12:52:11.803] Failed to bind socket for 192.168.1.46:3333
[2017-12-08 12:52:11.803] Connector failed to bind to socket, retrying in 5s