User guide

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No: The WebMux will NOT route incoming IP packets through the WebMux, except IP
packets for farm IP/port. This is the default setting.
Front Network Verification:
The WebMux checks the availability of the front network by checking on the IP address you
configured as your “external gateway ip” (your router IP). The selection here determines the
protocol used to check the connectivity of that IP address. It can be “none,” “ARP,” “TCP
Connection,” or “ping.” Depending on the front end router, this can be changed. For example,
most Cisco routers will talk to the WebMux through ARP and TCP Connection; however,
most Cisco DSL modems will only talk to the WebMux through Ping. Changes to this
verification method will take effect after the WebMux has been rebooted. If you have
configured a farm on the WebMux and the farm IP itself is showing dead, please verify that
your router responds to the method you have specified in this field.
Front Network Verification IP Address:
You can specify a different IP address for the WebMux to use to check the front network. It
can be the router in front of the WebMux, or a router in your ISP’s WAN. It can be any
address that is reachable on your Internet side. The protocol specified in the above field is
used. If you see the farm IP turning red, it is an indication that this address failed the check.
Leaving this field blank will cause the WebMux to use the IP address you specified as the
“external gateway ip” when you first set up the WebMux.
Persistence Timeout:
The WebMux will keep track the clients’ browser connections if the persistent farm is
defined and accessed. Within the timeout time period, the WebMux will send any request
from the browser IP address to the same server. Our survey shows 5–6 minutes is the best
value for most cases. The larger the persistence timeout value, the less chance user
connection get lost. However, by keeping a lot of connections in the WebMux memory, the
maximum number of available connections for new clients will drop.
Connection Timeout (Outbound):
The WebMux keeps track the outbound connections. This outbound proxy function provides
communication tunnels for servers behind it to talk to other computers on the Internet side.
This type of connection is different from the connections from outside through server farms
to the servers. After the connection closed from the servers to the outside computer, it will
wait this timeout minutes before it removes that from the tracking table. Setting this too long
will cause the WebMux to allocate too much memory, thus reduce the memory for other
functions. The default value is 15 minutes. This function has no effect in Out-of-Path Mode.
UDP NTP Time Server IP Address:
Since version 5.4, the WebMux can sync its internal clock with any UDP NTP server. By
default it points to a tier 2 NTP server. You can also set it to your Internet NTP server, or
wipe out the entry to not sync to any NTP server.