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switching off telnet services will not stop telnet connects to port 80 or port 25.
You can use telnet to connect to any open port ( a port that is listening ) that is ready to accept connections.
So, if you have apache or any other http server listening on port 80, it will also respond to telnet attempts ... although, it will not give a login prompt.
The reason I ask is because somebody tried an exploit on my webserver by telnetting to port 80 and issueing commands. They were unsuccessful and have been reported to their ISP.
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