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8-23
Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance
OL-26645-01
Chapter 8 Configuring Parameter Maps
Configuring DNS Parameter Maps
Step 4 Do the following:
Click Deploy Now to deploy this configuration.
Click Cancel to exit this procedure without saving your entries and to return to the Skinny
Parameter Maps table.
Click Next to deploy your entries and to configure another Skinny parameter map.
Related Topics
Configuring Parameter Maps, page 8-1
Configuring Traffic Policies, page 12-1
Configuring Virtual Contexts, page 4-1
Configuring DNS Parameter Maps
Domain Name System (DNS) parameter maps allow you to configure DNS actions for DNS packet
inspection.
Use this procedure to configure a DNS parameter map.
Procedure
Step 1 Select Config > Virtual Contexts > context > Load Balancing > Parameter Maps > DNS Parameter
Maps. The DNS Parameter Maps table appears.
Step 2 Click Add to add a new parameter map, or select an existing parameter map, and then click Edit to
modify it. The DNS Parameter Maps configuration screen appears.
Message Id Max. Enter the largest value for the station message ID in hexadecimal that the ACE is to accept.
Valid entries are hexadecimal values from 0x0 to 0x4000. The default value is 0x181.
Note The Message Id Max. hexadecimal value should always start with 0x or 0X.
If a packet arrives with a station message ID greater than the specified value, the ACE drops
the packet and generates a syslog message.
Min. SCCP Prefix Length
(Bytes)
By default, the ACE drops SCCP messages that have an SCCP Prefix length that is less than
the message ID. The ACE drops Skinny message packets that fail this check and generates a
syslog message.
Enter the minimum SCCP prefix length in bytes. Valid entries are integers from 4 to 4000
bytes.
Max. SCCP Prefix Length
(Bytes)
This feature allows you to configure the ACE so that it checks the maximum SCCP prefix
length. The ACE drops Skinny message packets that fail this check and generates a syslog
message.
Enter the maximum SCCP prefix length in bytes. Valid entries are integers from 4 to 4000
bytes.
Table 8-10 Skinny Parameter Map Attributes (continued)
Field Description
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