Cisco Cisco FirePOWER Appliance 8270

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FireSIGHT System User Guide
 
Chapter 25      Using Application Layer Preprocessors
  Decoding HTTP Traffic
Normalize Cookies in HTTP headers
Enables normalization of cookies in HTTP request headers. When 
Inspect HTTP Responses
 is enabled, 
also enables normalization of set-cookie data in response headers. You must select 
Inspect HTTP 
Cookies
 before selecting this options.
Allow HTTP Proxy Use
Allows the monitored web server to be used as an HTTP proxy. This option is used only in the 
inspection of HTTP requests.
Inspect URI Only
Inspects only the URI portion of the normalized HTTP request packet.
Inspect HTTP Responses
Enables extended inspection of HTTP responses so, in addition to decoding and normalizing HTTP 
request messages, the preprocessor extracts response fields for inspection by the rules engine. 
Enabling this option causes the system to extract the response header, body, status code, and so on, 
and also extracts set-cookie data when 
Inspect HTTP Cookies
 is enabled. For more information, see 
.
You can enable rules 120:2 and 120:3 to generate events for this option. See 
 for more information.
Normalize UTF Encodings to UTF-8
When 
Inspect HTTP Responses
 is enabled, detects UTF-16LE, UTF-16BE, UTF-32LE, and UTF32-BE 
encodings in HTTP responses and normalizes them to UTF-8.
You can enable rule 120:4 to generate events for this option. See 
 for 
more information.
Inspect Compressed Data
When 
Inspect HTTP Responses
 is enabled, enables decompression of gzip and deflate-compatible 
compressed data in the HTTP response body, and inspection of the normalized decompressed data. 
The system inspects chunked and non-chunked HTTP response data. The system inspects 
decompressed data packet by packet across multiple packets as needed; that is, the system does not 
combine the decompressed data from different packets for inspection. Decompression ends when 
Maximum Compressed Data Depth
Maximum Decompressed Data Depth
, or the end of the compressed data 
is reached. Inspection of decompressed data ends when 
Server Flow Depth
 is reached unless you also 
select 
Unlimited Decompression
. You can use the 
file_data
 rule keyword to inspect decompressed 
data; see 
 for more information.
Unlimited Decompression
When 
Inspect Compressed Data
 is enabled, overrides 
Maximum Decompressed Data Depth
 across multiple 
packets; that is, this option enables unlimited decompression across multiple packets. Note that 
enabling this option does not affect 
Maximum Compressed Data Depth
 or 
Maximum Decompressed Data 
Depth
 within a single packet. Note also that enabling this option sets 
Maximum Compressed Data Depth
 
and 
Maximum Decompressed Data Depth
 to 65535 when you commit your changes. See 
.