Base System - Compaq 117755-003 - ProSignia - 740 White Paper

278A/0497
W P
HITE APER
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The -y switch disables DNS lookups of source addresses when HTTP analyzes incoming
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connections. Default installations do not use this switch.
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The -z switch disables DNS lookups of destination addresses when HTTP analyzes
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incoming connections. Default installations do not use this switch.
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In using these switches to gain performance on HTTP transfers, some restrictions do apply:
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Alert thresholds for all HTTP rules are disabled. This is not usually a problem. Since HTTP
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traffic is so bursty by nature, even the highest alert thresholds are often exceeded.
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HTTP connections do not appear in Hawk's Gateway window. This is not usually a problem
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since HTTP connections are so short-lived.
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HTTP connections that have exceeded a time limit or time range are not automatically killed.
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Messages in the Eagle log file do not display the number of the rule being used.
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Number of rules used or rule base
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The NSTL setup requires a minimum of 4 rules, which are used for most tests. Rule sets of 100
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were also used to compare the performance difference in scanning the rule base.
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Protocols used during test configurations
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. . Tests are done using FTP and HTTP protocols and just the HTTP protocol. In both sets of tests a
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base system is used and the software and hardware difference is measured from the base system.
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MaxReceive buffer changes on the NetFlx-3 NIC cards
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. . Using the Windows NT Registry:
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HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\cpqnf3(#)\Parameters
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Add the following parameter:
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MaxReceives = REG_DWORD 0x1F4 = 500
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Increases the number of MaxReceives counters for Compaq Netelligent 10/100TX Network
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Controller to 500. (The default is 100.)
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Specifies the maximum number of receive lists the driver allocates for receive frames
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Base System

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ProLiant 5000 system
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1-Pentium Pro 200 MHz Processor, 512K cache
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. . 64 MB RAM
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2-EISA NetFlx-3 Network Interface Cards
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PCI Smart/2-Array controller, 1Disk, Raid 0
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MaxReceive Buffer for NetFlx-3 cards equals 100
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100 Mb Network
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HTTP cache is ON
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DNS Lookups for HTTP is ON
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