>>> But you didn't ask about how to limit access via telnet to "servers >>> controlled by consoles attached to industrial machines and trucks of a >>> big plant", you asked, on a trustix mailing list, how to limit access >>> via telnet, so it seems you want to limit access via telnet to a trustix >>> machine (and the former would be an odd question to ask on a trustix >>> mailing list anyway). Presumably, these "industrial machines" have some >>> kind of admin interface that is controlled via telnet -- that's fine, >>> and unrelated to logging into the trustix machine. For logging into a >>> trustix machine, you should be using ssh -- and not just for security, >>> but because ssh has tremendously better terminal support. >>> >>> >>>> So, can I prevent users from loggin in twice with the same >>>> username and how? >>> >>> On the console... since the console can only physically be used by one >>> person at a time, you could just comment out all but one of the getty >>> lines in /etc/inittab, then only one session CAN be logged in to the >>> console at a time. >> >> >> I'm sorry for the confusion. >> >> The situation is one Trustix server > > What version?
2.2 > running telnetd, > > OK you have to have telnet (crazy but fine) > > korn shell > > Why did you change the shell from bash? The (3rd party) cobol application running on the server is requiring it. > and a >> console-based cobol application and many terminals in the plant, >> capable of running only telnet over IP to the Trustix server. >> >> The only limit there has to be on the Trustix server is to prvent >> the same user from logging in twice. >> >> >> -- >> Ariën Huisken >> >> >> _______________________________________________ >> tsl-discuss mailing list >> [email protected] >> http://lists.trustix.org/mailman/listinfo/tsl-discuss > > -- Ariën Huisken _______________________________________________ tsl-discuss mailing list [email protected] http://lists.trustix.org/mailman/listinfo/tsl-discuss
