Remote Connection Emulator uses TN3270 telnet and not the RSE server to connect to the
host.
When using secure telnet (SSL) and you are working with certificates that are not signed by a
well-known CA, every client must add the CA certificate to their Remote Connection Emulator list of
trusted CAs.
The NOSNAEXT option of TCP/IP’s TELNETPARMS might be necessary
to disable the SNA functional extensions. If NOSNAEXT is specified, the TN3270
telnet server does not negotiate for contention resolution and SNA sense functions.