I think that is because everything in telnet is sent in plaintext... password included. It is also vulnerable to man-in-the-middle attacks.
See : http://en.wikipedia.org/wiki/Telnet#Security 2012/9/29 lina <[email protected]>: > Hi, > > I have the harden-clients installed. > > when I tried to install the telnet, > > it showed me conflict. > > # aptitude why telnet > Unable to find a reason to install telnet. > > I am just curious how telnet work. Is it not so secure to have it? or > what make it conflict with that package. > > Thanks for your time, > > Best regards, > > > -- > To UNSUBSCRIBE, email to [email protected] > with a subject of "unsubscribe". Trouble? Contact [email protected] > Archive: http://lists.debian.org/[email protected] > -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/CAGCzTpNhVWmbz+FicB940uYUeWR5rSRse=s=hydsx7rgv+6...@mail.gmail.com

