I'm trying to set up an ssl tunnel for VNC per the instructions at https://www.ibm.com/developerworks/library/l-sslvnc/index.html. I've not gotten very far into the steps. I tried:

# stunnel -d 5905 -r 5900 -p /root/combined.pem [ ] Clients allowed=500 [.] stunnel 5.35 on x86_64-slackware-linux-gnu platform [.] Compiled with OpenSSL 1.0.2h 3 May 2016 [.] Running with OpenSSL 1.0.2n 7 Dec 2017 [.] Update OpenSSL shared libraries or rebuild stunnel [.] Threading:PTHREAD Sockets:POLL,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI Auth:LIBWRAP [ ] errno: (*__errno_location ()) [!] Invalid configuration file name "-d" [!] realpath: No such file or directory (2) [ ] Cron thread initialized

I find nothing on the -d, -r or -p options in the manpage.

This is my 1st posting to this list. I have very rudimentary skills with ssl, ssh, and certificates, mainly limited to getting certificates from a provider and installing for web and email; and creating public keys for ssh login using ssh-keygen. That's about it, so I'm pretty much a certified newbie.

Help getting past the starting gate would be greatly appreciated.

THX --Mark