User manual

The WebMux™ Model 480S, 580SG, and 680PG User Guide – Version 7.0.x

services such as credit card validation and mapping services. (Note: this

function only works in NAT mode).

• Built-in Firewall Protections (layer4/5 only). Stop possible hacker

intrusion into your network from Internet. All IP addresses and ports are

blocked except the farm IP address. Built-in functions will detect any

possible denial of service attack and make your services always available.

(Note: this function only works in NAT mode with “Forwarding Deny”, see

setup for details).

• In-Path or Out-of-Path Load Balancing. In normal setup, the WebMux™

can be configured In-Path, to act as firewall in addition to the load balancer

and health checker. However, if outbound traffic is much larger than

inbound traffic and you already have a firewall in place, or change of IP

address causes problems, consider using Out-of-Path configuration. Out-

of-Path load balancing is also called direct routing, or one leg operation.

• Transparent Mode. In this mode, the WebMux™ behaves as an Ethernet

bridge between the servers and the Router LAN. The main advantage is

that the network settings in the servers do not have to be changed, no

loopback adapters or IP address changes needed. The servers will be

connected behind the WebMux™ but will appear to be on the same LAN

that the WebMux™ is connected to.

• Layer 7 Load Balancing. WebMux™ can direct traffic to specific groups

of servers within a farm according to a match pattern in HTTP MIME

header. This allows you, for example, to group servers that serve only a

specific type of content while serving other types of content on another

group of servers. WebMux™ Layer 7 load balancing also includes URI

load directing with host name MIME header matching and cookies in order

to memorize the user browser session and the server session and send the

same user to the same server. This is important for sites using shopping

cart and dynamically generated pages.

• Informs you of the status of your network. It provides phone pager

and email notification so that the network administrator can be paged or

emailed whenever a server or WebMux™ goes down, and when it returns

online. This feature could reduce server room night shift operator costs, or

timely repair should the server goes down unexpectedly.