Configuring Dns - Juniper SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X Configuration Manual

telnet listen

Configuring DNS

You can configure virtual routers to act as name resolvers for Domain Name Service
(DNS). DNS is a client/server mechanism that maps IP addresses to hostnames.
The name resolver is the client side of DNS and receives address-to-hostname requests
from its own clients when they want to contact hosts on other networks. By polling
name servers, the name resolver learns name-to-address translations for the hosts
its clients want to contact.
A name server may provide the translation from its cache or may poll servers lower
in the DNS hierarchy to obtain a translation. Typically, name servers at the top of
the hierarchy recognize top level domain names and know which servers to contact
for information about more detailed domain names. See Figure 24 on page 320.
Depending on how the remote system accepts Telnet requests, you can specify
a port number or port name through which the system will connect to the remote
host. In the Transmission Control Protocol (TCP), ports define the ends of logical
connections that carry communications. In most cases, you can accept the
default, port number 23, the Telnet port. For more information about port
numbers and associated processes, see www.iana.org.
You can force Telnet to use the IP address of an interface that you specify as its
source address.
Example
host1#telnet 192.168.35.13 fastEthernet 0
There is no no version.
See telnet.
Use to create a Telnet daemon to listen in a virtual router.
Example
host1(config)#virtual-router 3
host1:3(config)#telnet listen port 3223
Use the no version of the command to delete the daemon.
See telnet listen.
Chapter 5: Managing the System
319
Configuring DNS