Limits and Access Control

This page provides access to various resource limits, as well as provides system level access controls. If you wish to limit the system or network resources your server uses, this is the page to start with.

Deny access from

Here you may deny access to the server from any number of IP addresses, and you can provide a filename of a text error message file to send the client in the event they have been denied access based on this rule. This option configures the deny directive.

Concurrent user limits

Here you may limit the number of concurrent users from a given user class. To configure this option, you must provide a class for which the rule will apply, and the maximum number of users to allow to log in simultaneously. Next, you can choose times in UUCP L.sys format. This format is pretty simple, you choose the days by entering the first two letters with the first capitalized (i.e., Su for Sunday, or Mo for Monday), or Any for all days. Then the time is set in military format (1000 for 10AM, 2300 for 11PM, etc.). So to limit users during business hours, for example, we could enter MoTuWeThFr0800-1800. This option configures the limit directive.

File and data transfer limits

This option provides access to the transfer limits features of WU-FTPD. It is possible to limit user’s downloads based on files or data or both. You may also configure limits for outgoing and incoming transfers, and to which classes the limits should apply. This option configures the file-limit and data-limit directives.

Deny access to files and Allow access to files even if denied

If there are files in your directory tree that you do not wish to be retrievable by one or more classes of users, you may enter it here. The path may be relative to the FTP chroot, or it may be an absolute path (select which using the Relative to chroot option). This option correlates to the noretrieve directive. The Allow access to files even if denied option allows you to unselect files that would ordinarily be made inaccessible by the previous option. This option correlates to the allow-retrieve directive.

Anonymous session limit Guest session limit

Anonymous users and guest users can be limited to the specified time. This option correlates to the limit-time directive.

Maximum login failures

This option allows you to define the number of failed login attempts to allow before a “too many login failures” message is presented to the user and the FTP connection is closed. This option configures the loginfails directive and defaults to 5.

Can switch groups?

If this option is turned on, a user may switch to a new group after login. The user will then have the privileges of the new group. This configures the private directive and defaults to off.