47-10
Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter47 Configuring Inspection of Basic Internet Protocols
DNS Inspection
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
Customize—Opens the Add/Edit DNS Policy Map dialog box for additional settings.
Default Level—Sets the security level back to the default level of Low.
Modes
The following table shows the modes in which this feature is available:
Add/Edit DNS Policy Map (Security Level)
The Add/Edit DNS Policy Map dialog box is accessible as follows:
Configuration> Global Objec ts > Inspect Maps > DNS > DNS Inspect Map > Basic View
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—Select the security level (high, medium, or low).
Low—Default.
DNS Guard: enabled
NAT rewrite: enabled
Protocol enforcement: enabled
ID randomization: disabled
Message length check: enabled
Message length maximum: 512
Mismatch rate logging: disabled
TSIG resource record: not enforced
Firewall Mode Security Context
Routed Transparent Single
Multiple
Context System
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