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24-88
Cisco ASDM User Guide
OL-16647-01
Chapter 24 Configuring Application Layer Protocol Inspection
Inspect Map Field Descriptions
Add/Edit GTP Map
The Add/Edit GTP Inspect dialog box lets you define the match criterion and value for the GTP inspect
map.
Fields
• Match Type—Specifies whether traffic should match or not match the values.
For example, if No Match is selected on the string “example.com,” then any traffic that contains
“example.com” is excluded from the class map.
• Criterion—Specifies which criterion of GTP traffic to match.
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Access Point Name—Match on access point name.
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Message ID—Match on the message ID.
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Message Length—Match on the message length
–
Version—Match on the version.
• Access Point Name Criterion Values—Specifies an access point name to be matched. By default, all
messages with valid APNs are inspected, and any APN is allowed.
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Regular Expression—Lists the defined regular expressions to match.
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Manage—Opens the Manage Regular Expressions dialog box, which lets you configure regular
expressions.
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Regular Expression Class—Lists the defined regular expression classes to match.
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Manage—Opens the Manage Regular Expression Class dialog box, which lets you configure
regular expression class maps.
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Action—Drop.
–
Log—Enable or disable.
• Message ID Criterion Values—Specifies the numeric identifier for the message that you want to
match. The valid range is 1 to 255. By default, all valid message IDs are allowed.
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Value—Specifies whether value is an exact match or a range.
Equals—Enter a value.
Range—Enter a range of values.
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Action—Drop packet or limit rate (pps).
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Log—Enable or disable.
• Message Length Criterion Values—Lets you change the default for the maximum message length
for the UDP payload that is allowed.
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Minimum value—Specifies the minimum number of bytes in the UDP payload. The range is
from 1 to 65536.
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Maximum value—Specifies the maximum number of bytes in the UDP payload. The range is
from 1 to 65536.
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Action—Drop packet.
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Log—Enable or disable.
• Version Criterion Values—Specifies the GTP version for messages that you want to match. The valid
range is 0-255. Use 0 to identify Version 0 and 1 to identify Version 1. Version 0 of GTP uses port
3386, while Version 1 uses port 2123. By default all GTP versions are allowed.