Cisco Explorer 4700 Installation Guide download pdf (Page 160)

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Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance

OL-26645-02

Chapter 5 Configuring Virtual Servers

Configuring Virtual Servers

Header The name and value in an HTTP header are used for application inspection decisions.

1. In the Header field, select one of the predefined HTTP headers to match, or select HTTP

Header to specify a different HTTP header.

2. If you select HTTP Header, in the Header Name field, enter the name of the HTTP header to

match. Valid entries are unquoted text strings with no spaces and a maximum of 64

alphanumeric characters.

3. In the Header Value field, enter the header-value expression string to compare against the

value in the specified field in the HTTP header. Valid entries are text strings with a maximum

of 255 alphanumeric characters. The ACE supports regular expressions for matching. Header

expressions allow spaces, provided that the spaces are escaped or quoted. All headers in the

header map must be matched. See Table 12-33 for a list of the supported characters that you

can use in regular expressions.

Header Length The length of the header in the HTTP message is used for application inspection decisions.

1. In the Header Length Type field, specify whether HTTP header request or response messages

are to be used for application inspection decisions:

–

Request—HTTP header request messages are to be checked for header length.

–

Response—HTTP header response messages are to be checked for header length.

2. In the Header Length Operator field, select the operand to be used to compare header length:

–

Equal To—The header length must equal the number in the Header Length Value field.

–

Greater Than—The header length must be greater than the number in the Header Length

Value field.

–

Less Than—The header length must be less than the number in the Header Length Value

field.

–

Range—The header length must be within the range specified in the Header Length

Lower Value field and the Header Length Higher Value field.

3. Enter values to apply for header length comparison:

–

If you select Equal To, Greater Than, or Less Than in the Header Length Operator field,

the Header Length Value field appears. In the Header Length Value field, enter the number

of bytes for comparison. Valid entries are integers from 0 to 255.

–

If you select Range in the Header Length Operator field, the Header Length Lower Value

and the Header Length Higher Value fields appear:

1. In the Header Length Lower Value field, enter the lowest number of bytes to be used

for this match condition. Valid entries are integers from 0 to 255. The number in this field

must be less than the number entered in the Header Length Higher Value field.

2. In the Header Length Higher Value field, enter the highest number of bytes to be used

for this match condition. Valid entries are integers from 1 to 255. The number in this field

must be greater than the number entered in the Header Length Lower Value field.

Header MIME Type Multipurpose Internet Mail Extension (MIME) message types are used for application inspection

decisions.

In the Header MIME Type field, select the MIME message type to use for this match condition.

Table 5-6 HTTP and HTTPS Protocol Inspection Conditions and Options (continued)

Condition Description

1 ... 159 160 161 ... 648

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