LevelOne GTL-2691 - Manual (Page 978)

C HAPTER 30 | Access Control Lists
IPv4 ACLs
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E XAMPLE
This example accepts any incoming packets if the source address is within
subnet 10.7.1.x. For example, if the rule is matched; i.e., the rule
(10.7.1.0 & 255.255.255.0) equals the masked address (10.7.1.2 &
255.255.255.0), the packet passes through.
Console(config-ext-acl)#permit 10.7.1.1 255.255.255.0 any
Console(config-ext-acl)#
This allows TCP packets from class C addresses 192.168.1.0 to any
destination address when set for destination TCP port 80 (i.e., HTTP).
Console(config-ext-acl)#permit 192.168.1.0 255.255.255.0 any destination-port
80
Console(config-ext-acl)#
This permits all TCP packets from class C addresses 192.168.1.0 with the
TCP control code set to “SYN.”
Console(config-ext-acl)#permit tcp 192.168.1.0 255.255.255.0 any control-
flag 2 2
Console(config-ext-acl)#
R ELATED C OMMANDS
access-list ip (974)
Time Range (817)
ip access-group This command binds an IPv4 ACL to a port. Use the no form to remove the
port.
S YNTAX
ip access-group acl-name in [time-range time-range-name]
no ip access-group acl-name in
acl-name – Name of the ACL. (Maximum length: 16 characters)
in – Indicates that this list applies to ingress packets.
time-range-name - Name of the time range.
(Range: 1-30 characters)
D EFAULT S ETTING
None
C OMMAND M ODE
Interface Configuration (Ethernet)