Creating OCS Access Edge DNS SRV records in BIND
The OCS deployment guides have step-by-step instructions on creating the necessary DNS SRV records in Windows DNS Server, but what if you're using BIND as your external Internet-facing DNS server?
First you'll need an A record for the external IP address of your Access Edge:
e.g. sip.contoso.com -> 192.168.0.1
And you'll need the relevant SRV records for federation and remote user access:
e.g. _sipfederationtls._tcp.contoso.com and _sip._tls.contoso.com
So what should these look like in BIND?
_sipfederationtls._tcp.contoso.com. 86400 IN SRV 0 0 5061 sip.contoso.com.
_sip._tls.contoso.com. 86400 IN SRV 0 0 443 sip.contoso.com.
If we break that down:
_sipfederationtls._tcp.contoso.com. - that is the SRV record name. Notice the '.' on the end.
86400 - that is the TTL, in seconds.
IN - class
SRV - the record type
0 - priority
0 - weight
5061 - port number
sip.contoso.com. - the A record of the Access Edge. Notice the '.' on the end.
More information on this at http://www.zytrax.com/books/dns/ch8/srv.html
Technorati Tags:
ocs,
dns,
bind,
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federation
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