Configure Cisco Jabber DNS and Single Domain using Response Policy Zone (RPZ) and a single BIND9 DNS server
Cisco recommends dual DNS: public (external) and local (internal) DNS in order that Mobile and Remote Access can work more efficiently. Pinpoint entries (a zone created for a single host only) as suggested by Cisco could be a solution, but our DNS server is authoritative for the parent domain, so this wouldn't work. With the follwing setup and by using RPZ, jabber requests coming from the internet, are forwarded to Expressway-Edge and requests coming from the internal network are forwarded to Expressway-Core. Public (External) Records needed : _collab-edge._tls.example.com SRV 10 10 8443 expe1.example.com. Local (Internal) Records needed: _cisco-uds._tcp.example.com SRV 10 10 8443 cucm1.example.com _cuplogin._tcp.example.com SRV 10 10 8443 cup1.example.com Cisco states that a client first searches for internal DNS records: For example, Adam McKenzie's s...