sudo vpnc --local-port 1234 --debug 3
Enter password for nhartman@xyz.com:

vpnc version 0.5.4
   hex_test: 00010203

S1 init_sockaddr
 [2020-04-07 16:15:06]

S2 make_socket
 [2020-04-07 16:15:06]

S3 setup_tunnel
 [2020-04-07 16:15:06]
   using interface
vpnc: can't initialise tunnel interface:1