DNS Configuration on Host Server
The following records are required in the external DNS which hosts the externally routable domain (example.com). This allows:
-
External endpoints registration messages to be routed to the Expressway-E.
-
Calls from non-registered endpoints (or other infrastructure devices) to be routed to the Expressway-E.
Host DNS A Record
Host |
Host IP address |
---|---|
expe.example.com |
192.0.2.2 |
DNS SRV Records
Name |
Service |
Protocol |
Priority |
Weight |
Port |
Target host |
---|---|---|---|---|---|---|
example.com. |
h323cs |
tcp |
10 |
10 |
1720 |
expe.example.com. |
example.com. |
h323ls |
udp |
10 |
10 |
1719 |
expe.example.com. |
example.com. |
h323rs |
udp |
10 |
10 |
1719 |
expe.example.com. |
example.com. |
sip |
tcp |
10 |
10 |
5060 |
expe.example.com. |
example.com. |
sip |
udp 1 |
10 |
10 |
5060 |
expe.example.com. |
example.com. |
sips |
tcp |
10 |
10 |
5061 |
expe.example.com. |
example.com. |
turn |
udp |
10 |
10 |
3478 2 |
expe.example.com. |
For example, the DNS records would be:
_h323cs._tcp.example.com. 86400 IN SRV 10 10 1720 expe.example.com.
_h323ls._udp.example.com. 86400 IN SRV 10 10 1719 expe.example.com.
_h323rs._udp.example.com. 86400 IN SRV 10 10 1719 expe.example.com.
_sip._tcp.example.com. 86400 IN SRV 10 10 5060 expe.example.com.
_sip._udp.example.com. 86400 IN SRV 10 10 5060 expe.example.com.
_sips._tcp.example.com. 86400 IN SRV 10 10 5061 expe.example.com.
_turn._udp.example.com. 86400 IN SRV 10 10 3478 expe.example.com.
expe.example.com. 86400 IN A 192.0.2.2
If you have a cluster of Expressway-Es, you must set up DNS A and SRV records for each peer/host in the cluster. See the Expressway Cluster Creation and Maintenance Deployment Guide for more information.