I would have suggested this in Jira as a feature request, but I do not seem to have access.
When using Guacamole Telnet client to access a remote host, it was duplicating echo. This was a simple fix in src/protocols/telnet/client.c line 78. I changed echo_enabled from 1 to 0. This required recompiling the C code. I rebuilt the docker image for guacamole-server, and deployed the custom image instead of the Apache image. This feature request is to possibly expose that option in the Guacamole client itself, like many of the VNC and SSH options. Is it possible to rewrite the C code to accept those parameters as runtime variables? Or dockerfile build parameters? Or is that too complicated for a simple and likely rarely used feature? Thanks Sent with [Proton Mail](https://proton.me/mail/home) secure email.
