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Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter47 Configuring Inspection of Basic Internet Protocol s
DNS Inspection
Medium
DNS Guard: enabled
NAT rewrite: enabled
Protocol enforcement: enabled
ID randomization: enabled
Message length check: enabled
Message length maximum: 512
Mismatch rate logging: enabled
TSIG resource record: not enforced
High
DNS Guard: enabled
NAT rewrite: enabled
Protocol enforcement: enabled
ID randomization: enabled
Message length check: enabled
Message length maximum: 512
Mismatch rate logging: enabled
TSIG resource record: enforced
Default Level—Sets the security level back to the default level of Low.
Details—Shows the Protocol Conformance, Filtering, Mismatch Rate, and Inspection tabs to
configure additional settings.
Modes
The following table shows the modes in which this feature is available:
Add/Edit DNS Policy Map (Details)
The Add/Edit DNS Policy Map pane lets you configure the security level and additional settings for DNS
application inspection maps
Fields
Name—When adding a DNS map, enter the name of the DNS map. When editing a DNS map, the
name of the previously configured DNS map is shown.
Description—Enter the description of the DNS map, up to 200 characters in length.
Security Level—Shows the security level to configure.
Firewall Mode Security Context
Routed Transparent Single
Multiple
Context System
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