One of the things we use RDM for is connecting to switches. Switches use SSH and/or Telnet. RDM has no problem passing credentials to SSH sessions, but it does not seem to work for Telnet. Is there a trick to get it to work? Or can I request this feature?
Similar to SSH, this is the text I receive when I connect to a switch:
telnet session telnet0 on /dev/ptyb0
What connection type are you using inside RDM, is it Telnet or Telnet (rebex)? If you are using Telnet, you could try if it works with PuTTY as our implementation of SSH + Telnet are based on PuTTY.