Read More

Cluster General

Table of Contents

Load Balancer

Name | Type | Mode | Strategy

Session Management

Session Extraction | Session ID String | Session Timeout | Insert Tracking Cookie | Tracking Cookie Name | Show Backend In Header | Forward IP Header | Forwarded By Header

Custom Error Messages



A unique name for a cluster.



Specifies the type of cluster.

"Layer7" HTTP load balancing, also known as application-level load balancing, parses HTTP requests and distributes requests to servers based on different types of request contents.

"Layer4" load balancing is transport layer load balancing, such as TCP and UDP transport protocols. It does not look at the content when selecting a backend server. In theory, Layer 4 load balancing supports every application type.


Select from drop down list



Specifies which mode the load balancer operates in, "Stateless" or "Stateful".

"Stateful" mode track sessions associated with each back-end server. It also called "Session Affinity".

"Stateless" mode does not care about sessions.

For the Layer 4 Load Balancer, if the Mode is “Stateful”, it will track the IP address of the client to extract previous sessions.


Select from drop down list



Select load balancing strategy from the list.

  • The round-robin algorithm cycles through a list of backend Server instances in order.
  • The least-load algorithm improves on the round-robin algorithm by also taking into account the current work load of each server.
  • The least-session algorithm choose the server with fewest session associated.
  • The Fastest Response algorithm chooses the Worker Group node that responds the fastest to a backend worker ping.
  • The Failover algorithm chooses the Worker Group node that is configured with the highest priority. When that node becomes unhealthy, the next highest priority node is selected. If multiple nodes are configured with the same priority, then the first node configured will be selected. When an unhealthy node with a higher priority recovers, it will return as the highest priority node choice.


Select from drop down list

Session Extraction


Specify how to extract session ID from request.

IP Address: Uses Client IP as session ID.

Basic Authentication: Uses username in the basic authentication as session ID.

Query String: Uses a Parameter in request query string as session ID.

Cookies: Uses a Parameter in cookie as session ID.

SSL Session: Uses SSL Session ID as session ID.

JVM Route: JVM Route is an extra section appended to a Servlet session ID, which used to identify servlet backend. Example: JSESSIONID=344BA8002DE6FBE2QDF25.tomcat1

URL Path Parameter: Uses a URL Path Parameter as session ID.


Select from checkbox


For Layer 4 Load Balancers, only the IP Address extraction method will work. For Layer 7 Load Balancers, any of the above methods will work.

Session ID String


Specifies the Session ID string. The string is used to extract the session id value from cookie, query string and URL path parameter.

Session Timeout


Specify for how long a session will be valid, in seconds.


Integer number

Insert Tracking Cookie


Specify whether to insert a tracking cookie. The tracking cookie can be used to reconstruct session cache in case load balancer lost it.


Select from radio box

Tracking Cookie Name


Specify the tracking cookie name.



Show Backend In Header


Add response header 'x-lsadc-backend' which indicates that backend server that served the request. The header's value is a concatenation of the cluster name and the backend IP and port.

Default value: No


Select from radio box


"x-lsadc-backend: clusterHTTP_10.10.15.11:443"

Forward IP Header


An additional header to be added to all proxy requests made to the backend server. This header will use either the visiting IP or the value set in the 'X-Forwarded-For' header as it's value, depending on the value set for Use Client IP in Header.

Default value: Not Set


String with allowed characters a-z, A-Z, 0-9, underscore(_), and hyphen(-)



Forwarded By Header


An additional header to be added to all proxy requests made to the backend server. This header's value will be set to the serverName value.

Default value: Not Set


String with allowed characters a-z, A-Z, 0-9, underscore(_), and hyphen(-)



Custom Error Messages


Specify a custom error message in case error occured during distributing request to backend servers. Custom error messages configured at virtual host level will override this configuration.

Privacy Policy

Privacy Policy

LiteSpeed Technologies, Inc. (aka “LiteSpeed”) is committed to protecting your privacy. This policy ("Privacy Policy" or "Policy") explains our practices for our site, ("Site"). You can visit most pages of the Site without giving us any information about yourself, but sometimes we do need information to provide services that you request. By using this Site or any products or services provided through the Site, you expressly consent to the use and disclosure of information as described in this Privacy Policy.

LiteSpeed reserves the right to revise, modify, add, or remove provisions to this Privacy Policy at any time. If we make changes to this Privacy Policy, we will update the Effective Date to note the date of such changes. LiteSpeed encourages you to review this Privacy Policy periodically for any changes. IF YOU DO NOT AGREE WITH ANY OF THE TERMS BELOW, YOU SHOULD NOT USE THIS SITE OR THE PRODUCTS OR SERVICES OFFERED BY LITESPEED TECHNOLOGIES AT THIS SITE.

Collection of Information

Personal Information.

LiteSpeed will ask you for certain “Personal Information” when you complete registration or product information request forms on the Site, including but not limited to your name, address, telephone number, email address, and credit card information. You can always choose not to provide us with the requested information, however, you may not be able to complete the transaction or use our products or services if you do not provide the information requested.

Non-Personal Information.

LiteSpeed may collect non-personally identifiable information from you such as the type of browser you use, your operating system, the screen resolution of your browser, your ISP, your IP address, which pages you view on the Site and the time and duration of your visits to the Site (collectively, “Non-Personal Information”). LiteSpeed may associate Non-Personal Information with Personal Information if you register with the Site.

User Communications.

If you communicate with us, we may collect information relating to that communication whether it takes the form of email, fax, letter, forum posting, blog comments, testimonials or any other form of communication between you and LiteSpeed or Submitted by you to the Site (collectively, “User Communications”).

Server Information.

If you use one of our software products such as LiteSpeed Web Server or LiteSpeed Web ADC, we may collect certain information concerning such software and concerning the server upon which the software operates. This information includes: (a) the licensed or unlicensed status of the software; (b) the source from which the license for the software was obtained (i.e., LiteSpeed or a LiteSpeed affiliate); or (c) information about the server upon which the software is installed including (i) the public IP address, (ii) the operating system and (iii) the use of any virtualization technologies on such server ((a) through (c) collectively, “Server Information”). Additionally, “Server Information” may also include information collected from you by LiteSpeed in the event that you request technical support services including without limitation, IP addresses, usernames, and passwords necessary to login to SSH, the root directory of the server upon which you installed the LiteSpeed software and any affected accounts including email accounts, control panel accounts, MySQL accounts, CMS accounts and other accounts.

Use and Storage of Collected Information

LiteSpeed may use Personal Information to create and authenticate your account, to respond to your requests, to provide you with customer and technical support, or to provide you with information regarding our products, services, partners, and company. You may update your Personal Information with us at any time, but we may maintain records of any Personal Information you disclose to us indefinitely, unless otherwise requested as outlined below.

We may use User Communications in the same ways we use Personal Information. If you communicate with us for a particular purpose, we may use your User Communications for that purpose. For example, if you contact us for technical support, we may use your communications to provide technical support to you. We may maintain records of User Communications you transmit to us indefinitely, unless otherwise requested as outlined below.

LiteSpeed may use Non-Personal Information to maintain, evaluate, improve and provide our Site, the Services and any other LiteSpeed products and services. We may retain Non-Personal Information indefinitely.

We may use Server Information to provide you with technical support services and to maintain, evaluate, improve and provide LiteSpeed products and services. We may also use such information to investigate unlicensed (and therefore unauthorized) uses of our software. LiteSpeed may maintain Server Information indefinitely, with the exception of usernames, passwords, and other login information given in connection with support service requests. Such login information will be purged when the ticket is closed.

Disclosure of Collected Information

LiteSpeed will only disclose Personal Information to third parties if acting under a good faith belief that such action is necessary, including but not limited to: (a) to resolve disputes, investigate problems, or comply with laws or regulations; (b) to enforce our Terms of Service; (c) to protect and defend the rights, property, or safety of our company or our users; or (d) in the event of a merger, acquisition or sale of all or substantially all LiteSpeed assets. Other than this limited activity, we do not share, sell, or rent any personal information to third parties.

You will receive notice in the form of modifications to this Policy when information about you might go to third parties other than as described in this Policy, and you always have the opportunity to contact us as set forth below if you do not wish your information to go to third parties.

LiteSpeed cannot be responsible for protecting your information if you share such information in publicly available sections of the Site such as the user forums, blog comments, or testimonials section. You should use your own judgment in disclosing this information on the Site.

Use of Cookies

“Cookies” are small pieces of information that your browser stores on your computer on behalf of a website that you have visited. Cookies may be used in order to complete transactions on our site. You can always choose not to accept cookies with the settings of your web browser, however, you may not be able to complete these transactions if you do not accept cookies.

Security of Personal Information

We use reasonable security methods to protect your personal information from unauthorized access, use or disclosure. No data transmission over the Internet or any wireless network can be guaranteed to be perfectly secure. While we try to protect your personal information, we cannot guarantee the security of any information you transmit to us, and you do so at your own risk.

LiteSpeed uses industry-standard SSL-encryption to protect sensitive data.

In the event that LiteSpeed becomes aware of a security breach, unauthorized disclosure or inadvertent disclosure concerning your information, you agree that LiteSpeed may notify you of such an event using the Personal Information previously provided.

You are responsible for maintaining your account’s security.

GDPR Statement

LiteSpeed Technologies values your users’ privacy. Although our software does not directly collect any personally identifiable information from visitors to your site, LiteSpeed may still be considered a data processor, as user information may be temporarily cached and/or logged, as outlined in this document.


LiteSpeed Web Server, OpenLiteSpeed, LiteSpeed Web ADC, and related software may record IP addresses as a part of normal logging. An access log and an error log may record visitor IP addresses and URL visited. The logs are stored locally on the system where LiteSpeed server software is installed and are not transferred to or accessed by LiteSpeed employees in any way, except as necessary in providing routine technical support if you request it. This logging may be turned off through configuration. It is up to individual server administrators to come up with their own schedule for removing such logs from the file system.

Cache Solutions

Our cache plugins potentially store a duplicate copy of every web page on display on your site. The pages are stored locally on the system where LiteSpeed server software is installed and are not transferred to or accessed by LiteSpeed employees in any way, except as necessary in providing routine technical support if you request it. All cache files are temporary, and may easily be purged before their natural expiration, if necessary, via a Purge All command. It is up to individual site administrators to come up with their own cache expiration rules.

LSCache for WordPress

In addition to caching, our WordPress plugin has an Image Optimization feature. When optimization is requested, images are transmitted to a remote LiteSpeed server, processed, and then transmitted back for use on your site. LiteSpeed keeps copies of optimized images for 7 days (in case of network stability issues) and then permanently deletes them.

Similarly, the WordPress plugin has a Reporting feature whereby a site owner can transmit an environment report to our server so that we may better provide technical support.

Neither of these features collects any visitor data. Only server and site data is involved.

Support Services

Sometimes, when you request technical support, LiteSpeed may ask for login credentials to various areas of your site. You may refuse to share such credentials, however refusal may impact LiteSpeed’s ability to provide the requested support services.

Upon completion of a support ticket, LiteSpeed immediately deletes all login credentials you may have shared.

Any user data encountered by LiteSpeed is kept strictly confidential. We never provide your support ticket information to any third party without your explicit consent.

Contact Us

If you would like to update information that you have voluntarily provided to us, stop receiving information from us, or exercise any of the rights granted to you under Privacy Laws, including the EU’s General Data Protection Regulation, please e-mail