Cisco Cisco Email Security Appliance C190 Technical References

Look up a record on a DNS server

Commit: This command does not require a ‘commit’.

Cluster Management: This command can be used in all three machine modes (cluster, group, machine).

Batch Command: This command supports a batch format.

The batch format of the 

dig

 command can be used to perform all the functions of the traditional CLI 

command.

Look up a record on a DNS server

Do a reverse lookup for given IP address on a DNS server

These are the options available for the 

dig

 command’s batch format

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

mail.com> dig @111.111.111.111 example.com MX

dig [options] [@<dns_ip>] [qtype] <hostname>

dig -x <reverse_ip> [options] [@<dns_ip>]

    -s <source_ip>  Specify the source IP address.

    -t              Make query over TCP.

    -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.