Walkthrough: Create and Verify DNS Records
Topic Last Modified: 2009-07-22
The next step in deployment is to prepare the Office Communications Server 2007 R2 Domain Name System (DNS) entries. The following tables show the internal and external DNS records that you need. If you are performing this walkthrough to set up Office Communications Server 2007 R2 for your company, substitute your own domain name for Litwareinc.com.
Note
The DNS names that are suggested here are examples. The DNS record must match the fully qualified domain name (FQDN) for the external interface(s) and that the certificate subject name or subject alternate name (SAN) match the FQDN. The client receives the proper DNS information for Audio/Video and Web Conferencing from in-band provisioning after contacting and authenticating to sip.litwareinc.com. For details, see DNS Requirements for External User Access in the Planning and Architecture documentation.
Table 1. Internal DNS Records
| Internal DNS record | Usage | Record type | Port | IP address |
|---|---|---|---|---|
_sipinternaltls._tcp.litwareinc.com |
Client auto-connect |
SRV Record Resolved host: ocsse1.litwareinc.com |
5061 |
n/a |
ucupdates-r2.litwareinc.com |
Device Update Service |
A Record that points to the web components server (ocsse1.litwareinc.com) |
n/a |
192.168.1.100 |
ocsse1.litwareinc.com |
Name-based service resolution |
A Record Ocsse1.litewareinc.com |
n/a |
192.168.1.100 |
ocsedge.litareinc.com |
Name-based service resolution |
A Record Ocsedge.litwareinc.com |
n/a |
172.16.1.100 |
cwa.litwareinc.com |
Name-based service resolution |
A Record Cwa.litwareinc.com |
n/a |
192.168.1.101 |
as.cwa.litwareinc.com |
CWA desktop sharing |
CNAME that resolves to cwa.litwareinc.com |
n/a |
n/a |
download.cwa.litwareinc.com |
CWA desktop sharing |
CNAME that resolves to cwa.litwareinc.com |
n/a |
n/a |
For details, see DNS Requirements for Automatic Client Sign-In and DNS Requirements for Standard Edition Servers in the Planning and Architecture documentation.
Table 2. External DNS Records
| External DNS record | Usage | Record type | Port | IP address |
|---|---|---|---|---|
sip.litwareinc.com |
Primary SIP record for sip domain |
A Record |
n/a |
192.0.2.100 |
av.litwareinc.com |
Audio/video conferencing |
A Record |
n/a |
192.0.2.101 |
lm.litwareinc.com |
Web conferencing |
A Record |
n/a |
192.0.2.102 |
ocs.litwareinc.com |
Web components Web Farm FQDN |
A Record |
n/a |
192.0.2.105 |
cwa.litwareinc.com |
CWA access |
A Record |
n/a |
192.0.2.103 |
as.cwa.litewareinc.com |
CWA desktop sharing access |
CNAME to cwa.litwareinc.com |
n/a |
n/a |
download.cwa.litewareinc.com |
CWA desktop sharing access |
CNAME to cwa.litwareinc.com |
n/a |
n/a |
_sip._tls.litwareinc.com |
External user access |
SRV to sip.litwareinc.com |
443 |
n/a |
_sipfederationtls._tcp.litwareinc.com |
Federation discovery |
SRV to sip.litwareinc.com |
5061 |
n/a |