Creating and Committing a Security ACL
385
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.
The CLI does not accept port names in ACLs. To filter on ports by name,
you must use 3Com Wireless Switch Manager. For more information, see
the
Wireless Switch Manager Reference Manual
.
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
]
Time Exceeded (11)
Time to Live (TTL) Exceeded (0)
Fragment Reassembly Time Exceeded (1)
Parameter Problem (12)
None
Timestamp (13)
None
Timestamp Reply (14)
None
Information Request (15)
None
Information Reply (16)
None
Table 32
Common ICMP Message Types and Codes (continued)
ICMP Message Type (Number) ICMP Message Code (Number)
Summary of Contents for 3CRWX120695A
Page 138: ...138 CHAPTER 6 CONFIGURING AND MANAGING IP INTERFACES AND SERVICES ...
Page 272: ...272 CHAPTER 11 CONFIGURING RF LOAD BALANCING FOR MAPS ...
Page 310: ...310 CHAPTER 13 CONFIGURING USER ENCRYPTION ...
Page 322: ...322 CHAPTER 14 CONFIGURING RF AUTO TUNING ...
Page 350: ...350 CHAPTER 16 CONFIGURING QUALITY OF SERVICE ...
Page 368: ...368 CHAPTER 17 CONFIGURING AND MANAGING SPANNING TREE PROTOCOL ...
Page 412: ...412 CHAPTER 19 CONFIGURING AND MANAGING SECURITY ACLS ...
Page 518: ...518 CHAPTER 21 CONFIGURING AAA FOR NETWORK USERS ...
Page 530: ...530 CHAPTER 22 CONFIGURING COMMUNICATION WITH RADIUS ...
Page 542: ...542 CHAPTER 23 MANAGING 802 1X ON THE WX SWITCH ...
Page 598: ...598 CHAPTER 26 ROGUE DETECTION AND COUNTERMEASURES ...
Page 706: ...706 GLOSSARY ...