H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 49)

5-1
5
Configuring Source IP Address for Telnet Service
Packets
Go to these sections for information you are interested in:
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Overview
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Configuring Source IP Address for Telnet Service Packets
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Displaying the source IP address/Interface Specified for Telnet Packets
Overview
You can configure source IP address or source interface for Telnet client. This provides a way to
manage services and enhances security.
The source IP address specified for Telnet service packets is the IP address of a Loopback interface or
VLAN interface. After you specify the IP address of a virtual Loopback interface or an unused VLAN
interface as the source IP address of Telnet service packets, the IP address is used as the source IP
address no matter which interface of the access controller is used to transmit packets between the
Telnet client and the Telnet server. This conceals the IP address of the actual interface used. As a result,
external attacks are guarded and the security is improved. On the other hand, you can configure the
Telnet server to accept only Telnet service packets with specific source IP addresses to make sure
specific users can log in to the access controller.
Configuring Source IP Address for Telnet Service Packets
This feature can be configured in either user view or system view. The configuration performed in user
view takes effect for only the current session, while the configuration performed in system view takes
effect for all the following sessions.
Configuration in user view
Table 5-1 Configure a source IP address for service packets in user view
To do… Use the command… Remarks
Specify the source IP address or
source interface for the access
controller for it to log in to another
device as a Telnet client telnet remote-system
[ port-number ] [ source { ip
ip-address
| interface
interface-type interface-number } ]
Optional
Not specified by default