Starting Stunnel with configuration:
pid = /usr/local/var/run/stunnel.pid
foreground = yes
debug = notice
[listener-2888]
client = no
CAfile = /tmp/cluster-ca.crt
cert = /etc/tls-sidecar/zookeeper-nodes/my-cluster-zookeeper-0.crt
key = /etc/tls-sidecar/zookeeper-nodes/my-cluster-zookeeper-0.key
accept = 2888
connect = 127.0.0.1:28880
verify = 2
[listener-3888]
client = no
CAfile = /tmp/cluster-ca.crt
cert = /etc/tls-sidecar/zookeeper-nodes/my-cluster-zookeeper-0.crt
key = /etc/tls-sidecar/zookeeper-nodes/my-cluster-zookeeper-0.key
accept = 3888
connect = 127.0.0.1:38880
verify = 2
[listener-2181]
client = no
CAfile = /tmp/cluster-ca.crt
cert = /etc/tls-sidecar/zookeeper-nodes/my-cluster-zookeeper-0.crt
key = /etc/tls-sidecar/zookeeper-nodes/my-cluster-zookeeper-0.key
accept = 2181
connect = 127.0.0.1:21810
verify = 2
2020.04.14 23:05:40 LOG5[1:139889185458240]: stunnel 4.56 on x86_64-redhat-linux-gnu platform
2020.04.14 23:05:40 LOG5[1:139889185458240]: Compiled/running with OpenSSL 1.0.1e-fips 11 Feb 2013
2020.04.14 23:05:40 LOG5[1:139889185458240]: Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Auth:LIBWRAP
2020.04.14 23:05:40 LOG5[1:139889185458240]: Reading configuration from file /tmp/stunnel.conf
2020.04.14 23:05:40 LOG5[1:139889185458240]: FIPS mode is enabled
2020.04.14 23:05:40 LOG5[1:139889185458240]: Configuration successful
2020.04.14 23:06:02 LOG5[1:139889185453824]: Service [listener-2181] accepted connection from 172.17.0.6:47660
2020.04.14 23:06:02 LOG5[1:139889185453824]: Certificate accepted: depth=1, /O=io.strimzi/CN=cluster-ca v0
2020.04.14 23:06:02 LOG5[1:139889185453824]: Certificate accepted: depth=0, /O=io.strimzi/CN=cluster-operator
2020.04.14 23:06:02 LOG5[1:139889185453824]: connect_blocking: connected 127.0.0.1:21810
2020.04.14 23:06:02 LOG5[1:139889185453824]: Service [listener-2181] connected remote server from 127.0.0.1:52410
2020.04.14 23:06:02 LOG5[1:139889185453824]: Connection closed: 229 byte(s) sent to SSL, 95 byte(s) sent to socket
2020.04.14 23:06:09 LOG5[1:139889185453824]: Service [listener-2181] accepted connection from 172.17.0.11:53932
2020.04.14 23:06:09 LOG5[1:139889185453824]: Certificate accepted: depth=1, /O=io.strimzi/CN=cluster-ca v0
2020.04.14 23:06:09 LOG5[1:139889185453824]: Certificate accepted: depth=0, /O=io.strimzi/CN=my-cluster-kafka
2020.04.14 23:06:09 LOG5[1:139889185453824]: connect_blocking: connected 127.0.0.1:21810
2020.04.14 23:06:09 LOG5[1:139889185453824]: Service [listener-2181] connected remote server from 127.0.0.1:52464
2020.04.14 23:08:18 LOG5[1:139889185343232]: Service [listener-2181] accepted connection from 172.17.0.14:54366
2020.04.14 23:08:18 LOG5[1:139889185343232]: Certificate accepted: depth=1, /O=io.strimzi/CN=cluster-ca v0
2020.04.14 23:08:18 LOG5[1:139889185343232]: Certificate accepted: depth=0, /O=io.strimzi/CN=my-cluster-entity-operator
2020.04.14 23:08:18 LOG5[1:139889185343232]: connect_blocking: connected 127.0.0.1:21810
2020.04.14 23:08:18 LOG5[1:139889185343232]: Service [listener-2181] connected remote server from 127.0.0.1:53062
2020.04.14 23:08:19 LOG5[1:139889185232640]: Service [listener-2181] accepted connection from 172.17.0.14:54372
2020.04.14 23:08:19 LOG5[1:139889185232640]: connect_blocking: connected 127.0.0.1:21810
2020.04.14 23:08:19 LOG5[1:139889185232640]: Service [listener-2181] connected remote server from 127.0.0.1:53068
2020.04.14 23:08:19 LOG5[1:139889185122048]: Service [listener-2181] accepted connection from 172.17.0.14:54384
2020.04.14 23:08:19 LOG5[1:139889185122048]: connect_blocking: connected 127.0.0.1:21810
2020.04.14 23:08:19 LOG5[1:139889185122048]: Service [listener-2181] connected remote server from 127.0.0.1:53080
2020.04.14 23:08:20 LOG5[1:139889185011456]: Service [listener-2181] accepted connection from 172.17.0.14:54400
2020.04.14 23:08:20 LOG5[1:139889185011456]: connect_blocking: connected 127.0.0.1:21810
2020.04.14 23:08:20 LOG5[1:139889185011456]: Service [listener-2181] connected remote server from 127.0.0.1:53096
2020.04.14 23:08:34 LOG5[1:139889184900864]: Service [listener-2181] accepted connection from 172.17.0.6:48424
2020.04.14 23:08:34 LOG5[1:139889184900864]: Certificate accepted: depth=1, /O=io.strimzi/CN=cluster-ca v0
2020.04.14 23:08:34 LOG5[1:139889184900864]: Certificate accepted: depth=0, /O=io.strimzi/CN=cluster-operator
2020.04.14 23:08:34 LOG5[1:139889184900864]: connect_blocking: connected 127.0.0.1:21810
2020.04.14 23:08:34 LOG5[1:139889184900864]: Service [listener-2181] connected remote server from 127.0.0.1:53176
2020.04.14 23:08:35 LOG5[1:139889184900864]: Connection closed: 229 byte(s) sent to SSL, 95 byte(s) sent to socket
2020.04.14 23:08:35 LOG5[1:139889184900864]: Service [listener-2181] accepted connection from 172.17.0.6:48458
2020.04.14 23:08:35 LOG5[1:139889184900864]: Certificate accepted: depth=1, /O=io.strimzi/CN=cluster-ca v0
2020.04.14 23:08:35 LOG5[1:139889184900864]: Certificate accepted: depth=0, /O=io.strimzi/CN=cluster-operator
2020.04.14 23:08:35 LOG5[1:139889184900864]: connect_blocking: connected 127.0.0.1:21810
2020.04.14 23:08:35 LOG5[1:139889184900864]: Service [listener-2181] connected remote server from 127.0.0.1:53208