$ stunnel4 -v [ ] Clients allowed=500 [.] stunnel 5.44 on x86_64-pc-linux-gnu platform [.] Compiled with OpenSSL 1.1.0g 2 Nov 2017 [.] Running with OpenSSL 1.1.1 11 Sep 2018 [.] Update OpenSSL shared libraries or rebuild stunnel [.] Threading:PTHREAD Sockets:POLL,IPv6,SYSTEMD TLS:ENGINE,FIPS,OCSP,PSK,SNI Auth:LIBWRAP [ ] errno: (*__errno_location ()) [!] Invalid configuration file name "-v" [!] realpath: No such file or directory (2)
libssl1.1 version: 1.1.1-1ubuntu2.1~18.04.4
$ stunnel4 -v POLL,IPv6, SYSTEMD TLS:ENGINE, FIPS,OCSP, PSK,SNI Auth:LIBWRAP
[ ] Clients allowed=500
[.] stunnel 5.44 on x86_64-pc-linux-gnu platform
[.] Compiled with OpenSSL 1.1.0g 2 Nov 2017
[.] Running with OpenSSL 1.1.1 11 Sep 2018
[.] Update OpenSSL shared libraries or rebuild stunnel
[.] Threading:PTHREAD Sockets:
[ ] errno: (*__errno_location ())
[!] Invalid configuration file name "-v"
[!] realpath: No such file or directory (2)
libssl1.1 version: 1.1.1-1ubuntu2. 1~18.04. 4