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Special Forums Cybersecurity How can someone hack into a Linux server ? Post 302827851 by Corona688 on Monday 1st of July 2013 02:49:49 AM
Old 07-01-2013
Quote:
To brute-force my root account 506938 times they will need 253469 IP's cause they get permanently banned after 2 failed login attempts, but even if they did, my password is over 30 randomly generated characters long including upper + lower case letters, numbers, symbols and brackets.
This kind of paranoid security can be used against you in a pretty effective denial-of-service. If someone wants to lock you out of your machine, failing two logins can do it.
 

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listusers(1)							   User Commands						      listusers(1)

NAME
listusers - list user login information SYNOPSIS
listusers [-g groups] [-l logins] DESCRIPTION
Executed without any options, this command lists all user logins sorted by login. The output shows the login ID and the account field value from the system's password database as specified by /etc/nsswitch.conf. OPTIONS
The following options are supported: -g groups Lists all user logins belonging to group, sorted by login. Multiple groups can be specified as a comma-separated list. -l logins Lists the user login or logins specified by logins, sorted by login. Multiple logins can be specified as a comma-separated list. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
nsswitch.conf(4), attributes(5) NOTES
A user login is one that has a UID of 100 or greater. The -l and -g options can be combined. User logins will only be listed once, even if they belong to more than one of the selected groups. SunOS 5.10 18 Mar 1994 listusers(1)
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