Cisco Cisco Email Security Appliance C170 기술 참조
3-171
CLI Reference Guide for AsyncOS 10.0 for Cisco Email Security Appliances
Chapter 3 The Commands: Reference Examples
Networking Configuration / Network Tools
The
nslookup
command can confirm that the appliance is able to reach and resolve hostnames and IP
addresses from a working DNS (domain name service) server.
Usage
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 does not support a batch format
Example
mail.example.com> nslookup
Please enter the host or IP address to resolve.
[]> vm30esa0086.ibqa
Choose the query type:
1. A the host's IP address
2. AAAA the host's IPv6 address
3. CNAME the canonical name for an alias
4. MX the mail exchanger
5. NS the name server for the named zone
6. PTR the hostname if the query is an Internet address,
otherwise the pointer to other information
7. SOA the domain's "start-of-authority" information
8. TXT the text information
[1]> 2
AAAA=2001:420:54ff:ff06::95 TTL=30m
Table 3-10
nslookup
Command Query Types
Query Type
Description
A
the host's Internet address
CNAME
the canonical name for an alias
MX
the mail exchanger
NS
the name server for the named zone
PTR
the hostname if the query is an Internet address, otherwise the pointer
to other information
to other information
SOA
the domain's “start-of-authority” information
TXT
the text information