Installation manual

3-112
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Web – Specify the action (i.e., Permit or Deny). Specify the source and/or destination
addresses. Select the address type (Any, Host, or IP). If you select “Host,” enter a specific
address. If you select “IP,” enter a subnet address and the mask for an address range.
Set any other required criteria, such as service type, protocol type, or TCP control code.
Then click Add.
Figure 3-66 Configuring Extended IP ACLs
CLI – This example adds two rules:
(1) Accept any incoming packets if the source address is in 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.
(2) Allow TCP packets from class C addresses 192.168.1.0 to any destination address
when set for destination TCP port 80 (i.e., HTTP).
(3) Permit all TCP packets from class C addresses 192.168.1.0 with the TCP control
code set to “SYN.”
Console(config-ext-acl)#permit 10.7.1.1 255.255.255.0 any 4-177
Console(config-ext-acl)#permit tcp 192.168.1.0 255.255.255.0 any
destination-port 80
Console(config-ext-acl)#permit tcp 192.168.1.0 255.255.255.0 any
control-flag 2 2
Console(config-std-acl)#