User guide

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How come my servers in the farm are showing in red color from time to time, even
the servers are okay?
Your servers are trying to resolve the WebMux’s IP address to name so it could log them into
log file. To avoid this problem, set the servers not resolve the IP addresses. You can also try
adding all the IP address to the /etc/hosts file on your servers. For example,
www.mydomain.com 1.2.3.4 // use your real IP address
webmuxgw 192.168.199.1 // server lan gateway
webmuxip 192.168.199.254 // server lan WebMux
How many browsers can simultaneously access the WebMux management
console?
The limit is 4.
I have added a new farm/server, but the changes are not showing up on the
STATUS screen.
The web browser cache may be the cause of this. If the new configuration does not appear
after clicking on Reload or Refresh, then clear the cache or temporary files on the browser.
Will my web server be able to communicate to a credit card validation service, like
Cybercash?
Yes. Any communication initiated from the internal or private network, the WebMux will
substitute the IP address of its router LAN interface for the IP address of the host initiating
the conversation. For any service that requires a specific IP address to allow communication
into their network, the IP address of the router LAN interface must be the one provided. We
have had CyberCash engineers work with us to test this.
Can I use the WebMux as a proxy server for other hosts in my internal network?
Yes. The function that allows the web servers to talk to services such as the credit card
validation, allows the WebMux to function as a proxy server for any host in the internal
network. The WebMux will translate all internal addresses to the IP address of the “first
farm” defined. This is the farm that is created when answering the question: WebMux Router
LAN IP address:.
Configuring other computers using the WebMux’s proxy function is easy—just point the
gateway IP address to the WebMux backend IP address.
Do I need to have a firewall in front of the WebMux?
In most cases, no. In NAT mode, the WebMux blocks all the incoming traffic from router
LAN to your internal network. Unless there is a farm defined for a port number, the outside
traffic will not be able to reach to any server or computers behind the WebMux. The
WebMux does not have the management functionality for restricting which IP address or
services an internal host can reach to the outside. If such restriction is desirable, then
additional firewall is needed. A firewall is recommended if running the WebMux in
Transparent Mode or Out-of-Path.