Netgear GS728TPP Manuel d'utilisateur télécharger pdf (Page 198)

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GS752TP, GS728TP, and GS728TPP Gigabit Smart Switches

• Logging. When set to Enable, logging is enabled for this ACL rule (subject to

resource availability in the device). If the access list trap flag is also enabled, this

causes periodic traps to be generated indicating the number of times this rule was hit

during the current report interval. A fixed 5-minute report interval is used for the entire

system. A trap is not issued if the ACL rule hit count is 0 for the current interval. This

field is available for a deny action.

• Match Every. Requires a packet to match the criteria of this ACL. Select Enable or

Disable. Match Every is exclusive to the other filtering rules, so if Match Every is

enabled, the other rules on the screen are not available.

• Src IP Address. Requires a packet’s source IP address to match the address listed

here. Enter an IP address using dotted-decimal notation. The address you enter is

compared to a packet's source IP address.

• Src IP Mask. Specifies the source IP address wildcard mask. Wildcard masks

determine which bits are used and which bits are ignored. A wildcard mask of

255.255.255.255 indicates that no bit is important. A wildcard mask of 0.0.0.0

indicates that all of the bits are important. Wildcard masking for ACLs operates

differently from a subnet mask. A wildcard mask is in essence the inverse of a subnet

mask. For example, to apply the rule to all hosts in the 192.168.1.0/24 subnet, enter

0.0.0.255 in the Source IP Mask field. This field is required when you configure a

source IP address.

4. Click ADD.

Configuration changes take effect immediately.

To update an IP ACL rule, select the check box associated with the rule, update the desired

fields, and click APPLY. You cannot modify the Rule ID of an existing IP rule.

IP Extended Rules

Use the IP Extended Rules screen to define rules for IP-based extended ACLs. The access

list definition includes rules that specify whether traffic matching the criteria is forwarded

normally or discarded.

Note: There is an implicit “deny all” rule at the end of an ACL list. This rule

means that if an ACL is applied to a packet and if none of the explicit

rules match, the final implicit “deny all” rule applies and the packet is

dropped.

 To configure rules for an IP ACL:

1. Click Security  ACL > Advanced  IP Extended Rules.

In the following screen, an extended IP ACL exists, and two rules have been configured.

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Netgear GS728TPP Manuel d'utilisateur Page 198