Dell PowerConnect B-RX Configuration Manual page 140

4
Restricting remote access to management functions
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
The ACL in the example permits Telnet access only to the IP addresses in the permit entries and
denies Telnet access from all other IP addresses.
Using an ACL to restrict SSH access
To configure an ACL that restricts SSH access to the device, enter commands such as the following.
BigIron RX(config)# access-list 12 deny host 209.157.22.98 log
BigIron RX(config)# access-list 12 deny 209.157.23.0 0.0.0.255 log
BigIron RX(config)# access-list 12 deny 209.157.24.0/24 log
BigIron RX(config)# access-list 12 permit any
BigIron RX(config)# ssh access-group 12
BigIron RX(config)# write memory
Syntax: ssh 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.
These commands configure ACL 12, then apply the ACL as the access list for SSH access. The
device denies SSH access from the IP addresses listed in ACL 12 and permits SSH access from all
other IP addresses. Without the last ACL entry for permitting all packets, this ACL would deny SSH
access from all IP addresses.
NOTE
In this example, the command ssh access-group 10 could have been used to apply the ACL
configured in the example for Telnet access. You can use the same ACL multiple times.
Using an ACL to restrict Web management access
To configure an ACL that restricts Web management access to the device, enter commands such
as the following.
BigIron RX(config)# access-list 12 deny host 209.157.22.98 log
BigIron RX(config)# access-list 12 deny 209.157.23.0 0.0.0.255 log
BigIron RX(config)# access-list 12 deny 209.157.24.0/24 log
BigIron RX(config)# access-list 12 permit any
BigIron RX(config)# web access-group 12
BigIron RX(config)# write memory
Syntax: web access-group <num> | <name> | ipv6 <ipv6-access-list-name>
64 BigIron RX Series Configuration Guide
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