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416 Configuring and managing security ACLs
NN47250-500 (320657-F Version 02.01)
Setting TCP and UDP ACLs
Security ACLs can filter TCP and UDP packets by source and destination IP address, precedence, and TOS
level. You can apply a TCP ACL to established TCP sessions only, not to new TCP sessions. In addition,
security ACLs for TCP and UDP can filter packets according to a source port on the source IP address and/or
a destination port on the destination IP address, if you specify a port number and an operator in the ACE. (For
a list of TCP and UDP port numbers, see www.iana.org/assignments/port-numbers.)
The operator indicates whether to filter packets arriving from or destined for a port whose number is equal to
(eq), greater than (gt), less than (lt), not equal to (neq), or in a range that includes (range) the specified port.
To specify a range of TCP or UDP ports, you enter the beginning and ending port numbers.
Setting a TCP ACL
The following command filters TCP packets:
set security acl ip acl-name {permit [cos cos] | deny}
tcp {source-ip-addr mask | any [operator port [port2]]} {destination-ip-addr mask |
any [operator port [port2]]} [[precedence precedence][tos tos] | [dscp codepoint]]
[established] [before editbuffer-index | modify editbuffer-index] [hits]
For example, the following command permits packets sent from IP address 192.168.1.5 to 192.168.1.6 with
the TCP destination port equal to 524, a precedence of 7, and a type of service of 15, on an established TCP
session, and counts the number of hits generated by the ACE:
WSS# set security acl ip acl-4 permit tcp 192.168.1.5 0.0.0.0 192.168.1.6 0.0.0.0 eq 524
precedence 7 tos 15 established hits
(For information about TOS and precedence levels, see the Nortel WLAN Security Switch 2300 Series
Command Line Reference. For CoS details, see “Class of Service” (page 412).)
Setting a UDP ACL
The following command filters UDP packets:
set security acl ip acl-name {permit [cos cos] | deny} udp {source-ip-addr mask | any
[operator port [port2]]} {destination-ip-addr mask | any [operator port [port2]]}
[[precedence precedence][tos tos] | [dscp codepoint]]
[before editbuffer-index | modify editbuffer-index] [hits]
Note. The CLI does not accept port names in ACLs. To filter on ports by name, you must
use WLAN Management Software. For more information, see the Nortel WLAN
Management Software 2300 Series Reference Guide.