Load Balancers

These are mostly used to balanced HTTP requests to multiple web-servers, but also apply to SMTP, DNS and various other protocols. Some offer high-availability (HA) and some don't.

• HAProxy
• Nginx
• Varnish
• pfSense
• Linux Virtual Server - LVS
• Pure Load Balancer - PLB
• Ultra Monkey-L7
• Pen and Hercules