Brocade BigIron RX Series Configuration Guide - Manual (Page 134)

56 BigIron RX Series Configuration Guide
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Restricting remote access to management functions
3
• Specifically disabling Telnet, Web management interface, or SNMP access to the device
Using ACLs to restrict remote access
You can use standard ACLs to control the following access methods to management functions on
the device:
• Telnet access
• SSH access
• Web management access
• SNMP access
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, web 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.
NOTE
ACL filtering for remote management access is done in hardware.
Using an ACL to restrict Telnet access
To configure an ACL that restricts Telnet access to the device, enter commands such as the
following.
BigIron RX(config)# access-list 10 deny host 209.157.22.32 log
BigIron RX(config)# access-list 10 deny 209.157.23.0 0.0.0.255 log
BigIron RX(config)# access-list 10 deny 209.157.24.0 0.0.0.255 log
BigIron RX(config)# access-list 10 deny 209.157.25.0/24 log
BigIron RX(config)# access-list 10 permit any
BigIron RX(config)# telnet access-group 10
BigIron RX(config)# write memory
The commands configure ACL 10, then apply it as the access list for Telnet access. The device
allows Telnet access to all IP addresses except those listed in ACL 10.
Syntax: telnet access-group <num> | <name> | ipv6 <ipv6-access-list-name>
The <num> parameter specifies the number of a standard ACL, 1 – 99.
The <name> parameter specifies the standard access list name.
The ipv6 <ipv6-access-list-name> parameter specifies the IPv6 access list.
To configure a more restrictive ACL, create permit entries and omit the permit any entry at the end
of the ACL. For example.
BigIron RX(config)# access-list 10 permit host 209.157.22.32
BigIron RX(config)# access-list 10 permit 209.157.23.0 0.0.0.255
BigIron RX(config)# access-list 10 permit 209.157.24.0 0.0.0.255
BigIron RX(config)# access-list 10 permit 209.157.25.0/24
BigIron RX(config)# telnet access-group 10
BigIron RX(config)# write memory