Chapter7 Application Security
HTTP
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Cisco Router and Security Device Manager Version 2.2 User’s Guide
OL-4015-08
Click Permit, Block, and Alarm Controls to learn how to specify the action that
the router is to take when it encounters traffic with the ch aracteristics that you
specify in this window.
Verify Content Type checkbox
Check this box if you want the router to verify the content of HTTP packets by
matching the response with the request, by enabling an alarm for unknown con tent
types, or by using both of these methods. Use the permit, block, and alarm
controls to specify the action the router is to take when requests cannot be
matched with responses, and when it encounters an unknown conte nt type.
Set Content Length checkbox
Check this box to set a minimum and maximum length for the data in an HTTP
packet, and enter the values in the fields provided. Use the permit, block, and
alarm controls to specify the action the router is to take when the amount of data
falls below the minimum length or when it exceeds the maximum length.
Configure Transfer Encoding Checkbox
Check this box to have the router verify how the data in the packet is encoded, and
use the permit, block, and alarm controls to specify the action the router is to take
when it encounters the transfer encodings that you choose.
Chunk checkbox
The Encoding format specified in RFC 2616, Hypertext Transfer
Protocol—HTTP/1. The body of the message is transferred in a series of chunks;
each chunk contains its own size indicator.
Compress checkbox
The encoding format produced by the UNIX "compress" utility.
Deflate checkbox
The "ZLIB" format defined in RFC 1950, ZLIB Compressed Data Format
Specification version 3.3, combined with the "deflate" compression mechanism
described in RFC 1951, DEFLATE Compressed Data Format Specification
version 1.3.