To increase the number of telnet sessions allowed on a system, you will need to increase the value of the MaxSessions parameter in the Telnet server configuration file. The location of this file may vary depending on your operating system.
On a Windows system, the Telnet server configuration file is typically located at %systemroot%\system32\telnet.exe.config. To increase the number of Telnet sessions, you can edit this file and set the MaxSessions parameter to the desired value. For example:
<telnetServer maxSessions="50">
This will allow up to 50 Telnet sessions to be established concurrently.
On a Unix-based system, the Telnet server configuration file is usually located at /etc/xinetd.d/telnet. You can edit this file and set the instances parameter to the desired value. For example:
instances = 50
This will allow up to 50 Telnet sessions to be established concurrently.
Keep in mind that increasing the number of Telnet sessions may consume more system resources, so you should be careful not to set this value too high.