Cisco Cisco Expressway
Task 10: Configuring DNS zone search rules
The DNS search rule defines when the DNS zone should be searched.
A specific regular expression is configured which will prevent searches being made using the DNS zone (i.e.
on the public internet) for destination addresses (URIs) using any SIP domains which are configured on the
local network (local domains).
on the public internet) for destination addresses (URIs) using any SIP domains which are configured on the
local network (local domains).
To create the search rules to route via DNS:
1. Go to
Configuration > Dial plan > Search rules
.
2. Click New.
3. Configure the fields as follows:
Field name
Value on Expressway-C
Value on Expressway-E
Rule name
Not applicable
Enter DNS zone search rule for example
Description
Not applicable
Enter Search DNS zone (external calling) for
example
example
Priority
Not applicable
150
Protocol
Not applicable
Any
Source
Not applicable
All zones
Request must be
authenticated
authenticated
Not applicable
No
Mode
Not applicable
Alias pattern match
Pattern type
Not applicable
Regex
Pattern string
Not applicable
Enter (?!.*@%localdomains%.*$).*
Pattern behavior
Not applicable
Leave
On successful match
Not applicable
Continue
Target
Not applicable
DNSZone
State
Not applicable
Enabled
4. Click Create search rule.
Cisco Expressway Basic Configuration Deployment Guide (X8.5)
Page 23 of 56
Routing configuration