Technical Helpweb

Dialogic® IMG Integrated Media Gateway

How to configure a DNS server

              nameserver 127.0.0.1

               zone "gcems_lf.com" { 
               type master;
               file "gcems_lf.com.zone";
               };
        

              zone "51.129.10.IN-ADDR.ARPA" { 
              allow-update { none; };
              type master;
              file "10.129.51.zone";
              };

[root@lforsberg named]# more gcems_lf.com.zone
$TTL 86400
@ IN SOA lforsberg.gcems_lf.com root.lforsberg.gcems_lf.com (
10 ; serial
28800 ; refresh
14400 ; retry
3600000 ; expire
86400 ; ttl
)

lforsberg IN A 10.129.51.150
IMG1_SIP IN A 10.129.51.141
PC149_SIP IN A 10.129.51.149
G711 IN A 192.168.19.99
G723 IN A 192.168.19.99
G729 IN A 192.168.19.99
@ IN NS lforsberg

[root@lforsberg named]# more 10.129.51.zone
$TTL 86400
51.129.10.IN-ADDR.ARPA. IN SOA lforsberg.gcems_lf.com root.lforsberg.gcems_lf.com (
10 ; serial
28800 ; refresh
14400 ; retry
3600000 ; expire
86400 ; ttl
)


150.51.129.10.IN-ADDR.ARPA. IN PTR lforsberg.gcems_lf.com.
51.129.10.IN-ADDR.ARPA. IN NS lforsberg.gcems_lf.com.

[root@lforsberg named]#

          service named restart
          chkconfig named on   

3. Use nslookup or dig to test a DNS entry to verify it will resolve the name.  Errors are logged in the /var/log/messages file.


GCEMS ClientView configuration

1. Create the DNS Servers:
          • In the External Network Elements add the DNS Servers object.
          • For the Domain Name enter the domain name of the DNS server.





2. Create a new DNS server:
          • Enter the name and IP address of the DNS server




3. For each IMG Gateway add the DNS Client. If multiple servers were configured select the primary, secondary and tertiary server.




4. Add a SIP gateway.
          • Gateway Address Type = Host name
          • Gateway IP address. This is required for inbound calls as IMG Gateways do not support reverse DNS lookups.

Note: if the DNS server is using a pool of addresses for the host name and the IP address returned to a DNS request is not the same as configured below, the call will be rejected.

          • Gateway host name. If the Domain name entered in the DNS servers object is valid, then you only need to enter the host name here: otherwise, you will need to enter the full host.domain name.


5. Debug information can be obtained as follows:
 

          > n
          zNet> D

          Server Set Table
          DNS Server Set ID 0 Mem Addr:0x171566e0 Domain Suffix:gcems_lf.com
          DNS Server Table
          Server ID 3 IP:0xa813396 Port:53 NetIF:0xa81338d Server Set:0 Svr Priority:1

09:55:20.154 CALL(SIP) (01:00008:01) SENT DNS QUERY resolve: pc149_SIP to DNS
09:55:20.154 CALL(SIP) (01:00008:01) RCVD DNS QUERY RESOLVED : [10.129.51.149] from DNS
09:55:20.154 CALL(SIP) (01:00008:01) SENT INVITE to pc149_SIP:5060 UDP Cseq:1
09:55:20.154 CALL(SIP) (01:00008:01) with R-URI: pc149_SIP:5060 UDP
09:55:20.154 CALL(SIP) (01:00008:01) and Call-id: 71b7-407-492008145520-E1_System-1-10.129.51.141
09:55:20.344 CALL(SIP) (01:00008:01) RCVD 100 Trying from 10.129.51.149:5060 UDP CSeq:1