LiteSpeed Load Balancer Overview

LiteSpeed Load Balancer (LSLB) is an affordable, high-performance HTTP load balancer application. LSLB is feature-rich, secure, and efficient, offering more flexibility than similarly-priced load balancing software. This makes it an excellent choice for small enterprises looking to scale their applications beyond one server — both to improve service speed as well as reliability in case of hardware failure.

Main Features

  • HTTP/1.1 and HTTP/1.0 backward compatibile
  • Multiple load balancing algorithms
  • Session affinity with failover
  • Content aware routing
  • Can handle millions of websites
  • Supports SSLv2, SSLv3, and TLSv1
  • IP-level connection accounting and throttling to protect against DDoS attacks
  • Strict HTTP request checking
  • Web server process chroot ability
  • Intuitive WebAdmin console GUI


  • HTTP/1.1 and HTTP/1.0 backward compatible
  • Multiple load balancing algorithms: round-robin, least load, least session
  • Session affinity with failover
  • Content aware request routing
  • Direct requests based on domain names, request URL, cookies, SSL session, etc.
  • Intuitive WebAdmin console GUI
  • Realtime monitoring of backend server health
  • Supports HTTP, LiteSpeed SAPI, FastCGI and AJPv13 back ends
  • Dynamic response gzip compression/decompression
  • Gzip compression with backend HTTP server
  • Automatic HTTP protocol upgrade/downgrade to maintain persistent connections with backend servers
  • Massive shared hosting: load balance to millions of websites
  • URL rewrite compatible
  • SSL acceleration
  • Geotargeting support
  • IPv6 support


  • Supports SSLv2, SSLv3, and TLSv1
  • IP-level bandwidth and request rate throttling for DDoS protection
  • IP-level connection accounting for DDoS protection
  • Hotlink protection
  • Strict HTTP request checking
  • Request filtering (HTTP firewall): filter attacking requests based on request content
  • External application firewall for dynamic content
  • Whole server process chroot


  • Zero downtime maintenance (including reconfiguration and software upgrades)
  • Watchdog and instant recovery maximize uptime
  • Graceful shutdown: all requests in process will be completed.
  • Runs completely in the user space, OS reliability is not affected