
Chapter Intro
Intro - 6
New filter for rewriting HTTP redirections
This release provides an ISAPI filter, called redirectfilter.dll, which allows
IIS servers running Netscape to rewrite HTTP redirections. Rewriting HTTP
redirections helps to ensure that SSL connections remain on a secure
channel. By installing this filter on your IIS server, you offload the task of
rewriting HTTP redirections from your SSL Accelerator proxy to your IIS
server. For more information, see Rewriting HTTP redirection, on page
4-41.
Newglobalvariables
Two new global variables, open_failover_ports and self_conn_timeout,
are included in this release. The open_failover_ports variable allows you to
restrict network failover traffic on specific VLANs. The self_conn_timeout
variable acts as a tracking mechanism for UDP connections For more
information, see Chapter 7, bigpipe Command Reference.
Enhanced rules support
With this release comes a number of new variables and operators, to
enhance the ways that you can select pools for load balancing. Using rule
statements, you can now select pools based on such criteria as the IP
protocol of a packet, TCP/UDP port numbers, and QoS and ToS levels. A
rule can also now balance traffic based on whether the client IP address is a
member of a specific class. For SSL Accelerator proxies, you can use rules
to rewrite HTTP redirection to ensure that traffic remains on an SSL-secured
channel. For more information, see the Rules section in Chapter 4,
Configuring the High-Level Network.
Enhanced support for virtual servers
This release contains a number of enhancements to the BIG-IP virtual
server. First, you can now define multiple wildcard virtual servers instead of
a single wildcard virtual server only. For information on configuring
multiple wildcard virtual servers, see Creating multiple wildcard servers, on
page 4-74. Secondly, you can configure an option known as dynamic
connection rebinding, designed for those virtual servers that are load
balancing transparent devices such as firewalls or routers. Dynamic
connection rebinding causes any connections to a node address or service to
be redirected to another node, if the original node transitions to a DOWN
state. Finally, you can prevent a virtual server from sending a TCP reset
when a connection is timed out. For more information, see the Virtual
Servers section in Chapter 4, Configuring the High-Level Network.
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