Quick Reference Guide

PowerConnect B-Series TI24X Configuration Guide 857

53-1002269-02

Restricting remote access to management functions

You can restrict access to management functions from remote sources, including Telnet, , and

SNMP. The following methods for restricting remote access are supported:

• Using ACLs to restrict Telnet, or SNMP access

• Allowing remote access only from specific IP addresses

• Allowing Telnet and SSH access only from specific MAC addresses

• Allowing remote access only to clients connected to a specific VLAN

• Specifically disabling Telnet, or SNMP access to the device

The following sections describe how to restrict remote access to a device using these methods.

Using ACLs to restrict remote access

You can use standard ACLs to control the following access methods to management functions on a

device:

• Telnet

• SSH

• SNMP

Consider the following to configure access control for these management access methods.

1. Configure an ACL with the IP addresses you want to allow to access the device.

2. Configure a Telnet access group, SSH access group, and SNMP community strings. Each of

these configuration items accepts an ACL as a parameter. The ACL contains entries that

identify the IP addresses that can use the access method.

The following sections present examples of how to secure management access using ACLs. Refer

to Chapter 13, “Configuring Rule-Based IP Access Control Lists” for more information on

configuring ACLs.

Using an ACL to restrict Telnet access

To configure an ACL that restricts Telnet access to the device, enter commands such as the

following.

TFTP access Not secured Allow TFTP access only to clients connected to a

specific VLAN

page 862

Disable TFTP access page 865

TABLE 135 Ways to secure management access to devices (Continued)

Access method How the access

method is secured

by default

Ways to secure the access method See page