# gtunnel can do the follow things
#  a. listen plain, forward through TLS
#  b. listen plain, forward through plain
#  c. listen TLS, forward through plain
#  d. listen TLS, forward through TLS
#
# when cert and key specified it will listen on TLS
#

-
    # listen plain and forward through TLS 
    listen:
       host: 0.0.0.0
       port: 4120
           
    backend:
        host: 1.2.3.4
        port: 443

        # tls sni
        hostname: example.com

        # use TLS
        tls: true

        # verify server certificate or not
        # when set true, will not verify the server's certificate(danger)
        insecure: false

-
    # listen tls and forward through plain
    listen:
        host: 0.0.0.0
        port: 443
        cert: www.crt
        key: www.key

    backend:
        host: 127.0.0.1
        port: 4120
        tls: false

# more port forwards

#-
#     # listen TLS, forward through TLS
#    listen:
#        host: 0.0.0.0
#        port: 3122
#        cert: file.crt
#        key: file.key
#
#    backend:
#        host: www.example.com
#        port: 443
#        hostname: example.com
#        tls: true