Manual

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).
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
Priority Not applicable
150
Protocol Not applicable Any
Source Not applicable All zones
Request must be
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 (X8.5.2) Page 23 of 57
Routing configuration