Cisco Cisco Email Security Appliance C170 Referências técnicas

The following example explicitly specifies a DNS server for the lookup.

mail.com> dig @111.111.111.111 example.com MX

; <<>> DiG 9.4.3-P2 <<>> @111.111.111.111 example.com MX

; (1 server found)

;; global options:  printcmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18540

;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 3

;; QUESTION SECTION:

;example.com.                       IN      MX

;; ANSWER SECTION:

mexample.com.                10800   IN      MX      10 mexample.com.

;; AUTHORITY SECTION:

example.com.                     10800   IN      NS      test.example.com.

;; ADDITIONAL SECTION:

example.com. 10800 IN      A       111.111.111.111

example.com. 10800 IN      AAAA    2620:101:2004:4201::bd

example.com.   300     IN      A       111.111.111.111

;; Query time: 6 msec

;; SERVER: 10.92.144.4#53(10.92.144.4)

;; WHEN: Fri Dec  9 23:37:42 2011

;; MSG SIZE  rcvd: 143

The 

dig

 command filters out the information in the Authority and Additional sections if you do not 

explicitly specify the DNS server when using the command.

Configure DNS setup

    -u              Make query over UDP (default).

    dns_ip - Query the DNS server at this IP address.

    qtype - Query type: A, PTR, CNAME, MX, SOA, NS, TXT.

    hostname - Record that user want to look up.

    reverse_ip - Reverse lookup IP address.

    dns_ip - Query the DNS server at this IP address.