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Check on open Telnet server Port

If the result is positive, there is no need for further action. If the result is negative, please read the following instructions.

Result positive The Telnet Port on Your Server is not open.
Result negativ The Telnet Port on Your Server is open.
Description A Port is open on Your Server, which is usually used for the Telnet Program. Telnet is a Service that gives Users direct Access to other Computers. With this Program, you can potentially remotely control Your Server (after entering a Username and password). The Program does not encrypt transmitted Data, so an Attacker can simply spy on the Credentials.
Background Programs running on your server can open so-called ports. A port can be imagined as a door. With some ports (doors), you want them to be open so that, for example, customers can visit your website. With other ports (doors), you don't want them to be open. You should close ports that you don't use. This will allow attackers to attack your server from fewer sites.
Consequence Open ports do not represent a _direct_ vulnerability for now. The configuration of your server, however, increases the attack surface for attackers. You should not offer services that you do not use and it is best to disable insecure services altogether.
Solution/Tips If You don't need this Service, You should simply turn it off as it poses a Security Risk. If so, You should switch to the secure SSH service, which Is used to transmit data encrypted.