Scanning Diagnostics: No usable Telnet service

The following information is for Scan Diagnostic purposes only, and is not indicative of a detected vulnerability.

Please note that the Telnet protocol is entirely unencrypted, using Telnet as an authentication method for your scans should only be considered
when SSH authentication cannot be configured for a target, as it may be deemed a security risk. Where possible, please prefer SSH authentication
over Telnet authentication for scans.

The scan was unable to create a usable Telnet session using the Telnet credentials and Telnet configuration provided.
This may be due to the Telnet credentials being invalid, or the Telnet configuration provided may be misconfigured.