Hello all, I'm getting the following error when I try to connect to a remote 
server from inside a running Docker container: "Binding service [client] to 
127.0.0.1:1589: Address already in use (98)".  I don't think this port is 
actually in use, and I've tried other ports with the same results. I know that 
this configuration works in my Windows dev machine, from which I have 
consistently connected to the remote server, no problem.  I suspect this might 
be related to Docker's internal networking schema and port-forwarding, but I 
thought I would ask this group if anyone knows how to overcome this hurdle. 
Thanks for listening! Here is the config:  
[client]
client = yes
accept = 127.0.0.1:1589
connect = nn.nnn.nnn.nnn:443
checkHost = xxxxxxxxx.com
sslVersion = TLSv1.2
CAfile = /usr/local/etc/stunnel/my_pemfile.pem
verifyPeer = yes

Here is the log trace:
[ ] Clients allowed=512000
[.] stunnel 5.56 on x86_64-pc-linux-gnu platform
[.] Compiled/running with OpenSSL 1.1.1d  10 Sep 2019
[.] Threading:PTHREAD Sockets:POLL,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI
[ ] errno: (*__errno_location ())
[.] Reading configuration from file /usr/local/etc/stunnel/stunnel.conf
[.] UTF-8 byte order mark detected
[.] FIPS mode disabled
[ ] Compression disabled
[ ] No PRNG seeding was required
[ ] Initializing service [client]
[ ] Ciphers: 
DES-CBC3-SHA:IDEA-CBC-MD5-DHE-RSA-AES256-SHA:DHE-DSS-AES256-SHA:AES256-SHA
[ ] TLSv1.3 ciphersuites: 
TLS_CHACHA20_POLY1305_SHA256:TLS_AES_256_GCM_SHA384:TLS_AES_128_GCM_SHA256
[ ] TLS options: 0x02100004 (+0x00000000, -0x00000000)
[ ] No certificate or private key specified
[.] Configuration successful
[ ] Binding service [client]
[ ] Listening file descriptor created (FD=8)
[ ] Setting accept socket options (FD=8)
[ ] Option SO_REUSEADDR set on accept socket
[.] Binding service [client] to 127.0.0.1:1589: Address already in use (98)
[ ] Listening file descriptor created (FD=8)
[ ] Setting accept socket options (FD=8)
[ ] Option SO_REUSEADDR set on accept socket
[.] Binding service [client] to 127.0.0.1:1589: Address already in use (98)
[!] Binding service [client] failed
[ ] Deallocating section defaults
[ ] Unbinding service [client]
[ ] Service [client] closed
[ ] Deallocating section [client]
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