restricted ftp user not login system through telnet

[steven chang_1]

1. modify the shell configuration of /etc/passwd to /dev/null
2.add /dev/null to /etc/shells
3. testing
4. ok

[T G Manikandan · Accepted solution]

It should be /usr/bin/false in the shells field and not /dev/null

Thanks

[Michael Tully]

Set the shell of the user account to /usr/bin/false
Make sure all valid shells are included in /etc/shells, do not add /dev/null

[steven chang_1]

hello:

why don't use /dev/null???

[T G Manikandan]

/dev/null is a null file.
/usr/bin/false is a script that exits if any user attempts to connect to the system through the account.