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Bandwidth Throttling ("Bandwidth Limitations") in Serv-U  -  KB Article #1589

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Serv-U can enforce bandwidth throttling on its FTP server, FTPS server, SFTP server and web server interfaces. This allows administrators to protect quality of service guarantees by ensuring that file transfer traffic does not flood restricted networks.

Serv-U allows restrictions to be placed on individual Users, on a Group, on a Serv-U Domain, or on the entire Serv-U Server. These limits act in unison, allowing bandwidth to be partitioned any way necessary, restricting a server while granting some groups higher bandwidth, or capping all users to specific amounts of bandwidth. The are inherited, so that a per-user limit can be set at the Server level which might be overridden for administrative User accounts at the User level, etc.

In the sections below, all limits related to bandwidth are contained in the Limit Type of "Data Transfer", which can be accessed from the Limits menu of User accounts, Groups, Domains (on the left-hand portion of the Management Console under Limits & Settings) or for the whole server (on the right-hand portion of the Management Console under Limits & Settings).

Setting Bandwidth Limitations Per User

The simplest way of setting bandwidth limitations is to set them up for individual user accounts. This allows limits to be set for each user and does not affect other user accounts. To create bandwidth limitations per-user:

  1. Open the Users menu and edit the User account which should be limited
  2. Open the "Limits and Settings" menu and select the "Limit Type" of "Data Transfer"
  3. To limit download bandwidth, click on "Add" and select "Maximum download speed for user accounts"
  4. To limit upload bandwidth, click on "Add" and select "Maximum download speed for user accounts"

Setting Bandwidth Limitations Per Group

If bandwidth limitations must be set per-group, they can be set by editing the Group and opening the "Limits and Settings" menu. Similarly, the "Data Transfer" limits are used. The "Maximum upload speed for all group members" and "Maximum download speed for all group members" limits are used to limit the group as a whole, and notice also that the user-level bandwidth limitations can be set here and inherited by group members.

Setting Bandwidth Limitations Per Domain

Serv-U Domains, which are collections of Users and Groups bound by common settings, can also be set to cap at specific levels of bandwidth usage. The "Limits and Settings" menu on the left-hand side of the main Management Console page allows these limits to be set. The Domain level of configuration adds the "Maximum download speed for domain" and "Maximum upload speed for domain" options, and also allows the user-level settings to be configured and inherited by Groups or Users.

Setting Bandwidth Limitations Per Server

Serv-U as a server can also be set to consume only a certain amount of bandwidth. This is a server-wide limit that cannot be overridden. The "Limits and Settings" menu on the right-hand side of the main Management Console page allows these limits to be set. The Server level of configuration lists the "Maximum download speed for server" and "Maximum upload speed for server" options, and also allows the user-level settings to be configured and inherited by Groups or Users.



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