C
HAPTER
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| Security Measures
Access Control Lists
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◆ Source Subnet Mask – A subnet mask containing four integers from 0
to 255, each separated by a period. The mask uses 1 bits to indicate
“match” and 0 bits to indicate “ignore.” The mask is bitwise ANDed with
the specified source IP address, and compared with the address for
each IP packet entering the port(s) to which this ACL has been
assigned.
◆ Time Range – Name of a time range.
WEB INTERFACE
To add rules to an IPv4 Standard ACL:
1. Click Security, ACL.
2. Select Configure ACL from the Step list.
3. Select Add Rule from the Action list.
4. Select IP Standard from the Type list.
5. Select the name of an ACL from the Name list.
6. Specify the action (i.e., Permit or Deny).
7. Select the address type (Any, Host, or IP).
8. If you select “Host,” enter a specific address. If you select “IP,” enter a
subnet address and the mask for an address range.
9. Click Apply.
Figure 192: Configuring a Standard IPv4 ACL
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