Additional Cluster Configuration
The Related Topics describe additional cluster configuration.
About Passive FTP Translation
In EQ/OS 8.6 if your servers were on a network that the outside world could not reach, you were
provided the capability of enabling a passive FTP translation option. This option caused Equalizer
to rewrite outgoing FTP PASV control messages from the servers so they could contain the IP
address of the virtual cluster rather than that of the server. This was a global option.
In building EQ/OS 10 our experience indicated that the great majority of customers using FTP
wanted this option turned ON. With that "passive FTP translation" is now always ON. It is set
internally and there is no user interface control to turn it OFF. Our analysis leads us to believe that
the only reason to turn it OFF would be in a high-bandwidth FTP server farm that supports "active
FTP" only.
Contact customer support for instructions if you require this feature to be turned OFF.
Enabling Cookies for Persistent Connections
For Layer 7 HTTP and HTTPS clusters, you can enable the
persist
check box to use cookies to
maintain a persistent session between a client and a particular server for the duration of the
session.
When you use cookie-based persistence, Equalizer inserts a cookie into the server’s response
header on its way back to the client. This cookie uniquely identifies the server to which the client
was connected and is included automatically in subsequent requests from the client to the same
cluster. Equalizer can use the information in the cookie to route the requests to the same server.
If the server is unavailable, Equalizer automatically selects a different server.
This option is enabled by default. Also see the descriptions of the
always
,
cookie age
,
cookie domain
,
and
cookie path
cluster parameters under
"Modifying a Layer 7 HTTP or HTTPS Cluster"
Enabling Persistent Server Connections
Equalizer provides several methods by which connections between clients and servers can be
made persistent; that is, it is possible to route a series of requests from a particular client to the
same server, rather than have the Equalizer load balance each request in the series -- potentially
sending each request to a different server.
l
For Layer 4 clusters, persistent server connections are enabled using the Sticky Time
cluster parameter and (optionally) the Inter-Cluster Sticky cluster flag.
l
For Layer 7 clusters, persistent server connections are enabled using the
Persist
and
Always
cluster flags.
Enabling Sticky Connections
For Layer 4 TCP and UDP clusters, you can use IP-address based sticky connections to maintain
persistent sessions.
Copyright © 2014 Coyote Point Systems, A Subsidiary of Fortinet, Inc.
All Rights Reserved.
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Equalizer Administration Guide
Summary of Contents for Equalizer GX Series
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