Cisco 500 Series, Configuration Manual

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Cisco Security Appliance Command Line Configuration Guide
OL-12172-03
Chapter 37 Configuring Clientless SSL VPN
Optimizing Clientless SSL VPN Performance
Configuring Web E-mail: MS Outlook Web Access
Web e-mail is MS Outlook Web Access for Exchange 2000, Exchange 5.5, and Exchange 2003. It
requires an MS Outlook Exchange Server at the central site. It also requires that users perform the
following tasks:
•
Enter the URL of the mail server in a browser in your Clientless SSL VPN session.
• When prompted, enter the e-mail server username in the format domain\username .
•
Enter the e-mail password.
Optimizing Clientless SSL VPN Performance
The security appliance provides several ways to optimize Clientless SSL VPN performance and
functionality. Performance improvements include caching and compressing web objects. Functionality
tuning includes setting limits on content transformation and proxy-bypass. APCF provides an additional
method of tuning content transformation. The following sections explain these features:
• Configuring Caching
•
Configuring Content Transformation
Configuring Caching
Caching enhances Clientless SSL VPN performance. It stores frequently reused objects in the system
cache, which reduces the need to perform repeated rewriting and compressing of content. It reduces
traffic between Clientless SSL VPN and the remote servers, with the result that many applications run
much more efficiently.
By default, caching is enabled. You can customize the way caching works for your environment by using
the caching commands in cache mode, which you enter from webvpn mode, as in the following example.
hostname(config)#
hostname(config)# webvpn
hostname(config-webvpn)# cache
A list of caching commands and their functions follows:
Cache Command Function
disable Disables caching.
expiry-time Configures an expiration time for caching objects.
lmfactor Configures terms for revalidating cached objects.
max-object-size Sets a maximum size for objects to cache.
min-object-size Sets a minimum size for objects to cache.
cache-static-content Caches all cacheable web objects, content not subject to rewriting.
Examples include images and PDF files.