Read More


LiteSpeed Web Server is designed with security as a top consideration. LSWS supports SSL, has access control at server and virtual host levels, and context-specific realm protection. Besides these standard features, LSWS also has the following special security features:

  1. Connection level limits:

    • IP-level throttling limits network bandwidth to and from a single IP address regardless of the number of connections.
    • IP-level connection accounting limits the number of concurrent connections from a single IP address. You can controll this with the connection soft limit, connection hard limit, grace period, and banned period settings in the WebAdmin console.
  2. Request checking:

    Every HTTP request is vetted by LiteSpeed Web Server. "/." is not allowed in a decoded URL, thus denying accessing hidden files and parent directories.

    Request size is limited by LiteSpeed Web Server's max request URL length, max request header length, and max request body length settings.

  3. Web Application Firewall:

    Request Filtering can be performed on the request header/body to check against possible attack signatures. This helps defend against XSS attacks and SQL injection attacks, blocking those requests right from the start.

  4. Static file checking:

    LiteSpeed Web Server will serve a static file only if the following conditions are satisfied:

    • The file is readable by everyone.
    • The file is not executable.
    • The file is not in the access denied directory list.
    • The file does not contain symbolic link if symbolic links are not allowed.
    • By default, LiteSpeed Web Server does not index a directory by listing its files, it has to be enabled explicitly.
  5. External application firewall:

    LiteSpeed Web Server forwards requests to external applications to process/generate dynamic content. Those applications can use a lot of system resources. The performance of the whole system will be severely degraded when system resource consumption reaches a certain point -- when swapping space has to be used, for example. One way to conduct a DoS attack is to flood the web server with concurrent requests to a cumbersome external application.

    LiteSpeed Web Server can pipeline requests and control the concurrent level of external application use to prevent overconsumption of system resources. LSWS caches requests and only forwards completed requests to the external application. This means the external application will not be held waiting while the server is receiving the request. LSWS also caches the external application's response so that the external application can be released as soon as the response is completed and does not have to wait for the client to receive the complete response. This way the server can utilize fewer external application instances to serve more concurrent requests and achieve higher performance and scalability. LiteSpeed Web Server also uses its own virtual memory to cache the request and response body to minimize the usage of system memory without sacrificing performance.

  6. CGI resources consumption limit:

    LiteSpeed Web Server restricts the amount of system resources that can be consumed by CGI applications. For each request to a CGI script, the web server needs to start a standalone CGI process to handle it. On a Unix system, the number of concurrent processes is limited. With the CGI resources consumption limit, you can configure the maximum number of concurrent CGI instances that the web server can launch. Excessive concurrent processes will degrade the performance of the whole system. (CGI processes are a common weapon for DoS attacks.) A system process limit can be specified per user in order to control the number of processes that can be spawned by a CGI application. Each process is further confined by CPU and memory limits.

  7. Enhanced CGI/FastCGI security with suEXEC:

    In order to reduce the security risks of a CGI or Fast CGI script, LiteSpeed Web Server can restrict the system resources the CGI script can access by running it in "suEXEC" or "chroot jail" mode. "suEXEC" starts the CGI or Fast CGI script with a different user ID from that of the web server. This greatly improves security in shared hosting environment by preventing one user's CGI script from accessing other users' files.

    "chroot jail" starts the CGI script under an assigned alternative root directory. The script can not access files beyond this new root directory. With this, you no longer need to worry about confidential system files being exposed by vulnerable scripts.

  8. Run LSWS in chroot jail [Enterprise Edition Only]:

    LiteSpeed Web Server can run in a chroot environment (known as a chroot jail). In the chroot environment, the web server and its child processes cannot access files outside of the chroot jail. This protects the system from attacks by malicious code.

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