Miroslav, I have chronyd 2.4.1 running on FreeBSD 11.0 release and it's working fine. All refclocks are internet servers and data is received normally. I have just compiled chrony 3.0-pre1 and it fails to receive any timestamp data from the internet refclocks. I tried again with the latest master from git and it fails in the same way, This is some debug output from the git master version and it seems there is an almost immediate timeout on both send and receiving data from any socket.
2016-12-14T15:25:22Z ntp_core.c:1056:(transmit_timeout) Transmit timeout for [194.171.167.130:123] 2016-12-14T15:25:22Z ntp_io.c:830:(NIO_SendPacket) Sent 48 bytes to 194.171.167.130:123 from [UNSPEC] fd 7 2016-12-14T15:25:22Z ntp_io.c:668:(process_message) Received 0 bytes from 194.171.167.130:123 to [UNSPEC] fd=7 if=-1 tss=1 delay=0.000104191 2016-12-14T15:25:22Z ntp_core.c:1056:(transmit_timeout) Transmit timeout for [80.94.65.10:123] 2016-12-14T15:25:22Z ntp_io.c:830:(NIO_SendPacket) Sent 48 bytes to 80.94.65.10:123 from [UNSPEC] fd 8 2016-12-14T15:25:22Z ntp_io.c:668:(process_message) Received 0 bytes from 80.94.65.10:123 to [UNSPEC] fd=8 if=-1 tss=1 delay=0.000099536 If there is anything I can do to test or provide more information, please let me know. Adri,.