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Configuring ACLs

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Information About ACLs

Access Control Lists (ACLs) are an ordered set of rules that you can use to filter traffic. Each rule specifies a set of conditions that a packet must satisfy to match the rule. When the switch determines that an ACL applies to a packet, it tests the packet against the conditions of all rules. The first match determines whether the packet is permitted or denied. If there is no match, the switch applies the applicable default rule. 
 
With Meraki, you only have to define an ACL once in a network and it will be propagated to all switches within that network. Additionally, the default rule for Meraki ACLs is "Permit Any Any".

 

For more detailed information and examples of ACLs, see our MS Switch ACL Operation article.

ACL Location in Meraki Dashboard

To configure an ACL from the Meraki dashboard, navigate to Switch > Configure > ACL.

 

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Initial Setup

Upon initial setup, you will see that the explicit "Permit Any Any" rule is defined by default.

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Add a Rule

To add a new rule, select the Add a rule button below the list of ACL rules.

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Edit a Rule

For each ACL rule, you can define the policy, IP version, source IP address or subnet, source port, destination IP address or subnet, destination port, and VLAN. You also have the option to describe the rule in a comment section.

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Note: The source and destination addresses must be an IP address or subnet in CIDR form (e.g. '192.168.1.0/24'), or 'any'.

Note: The VLAN qualifier is not supported on the MS390. For the MS390, ACL rules with non-empty VLAN fields will be ignored.

Move a Rule

To change the position of a specific rule in the ACL, select the crossed arrows symbol to the right of the rule and drag the rule up or down the list.

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Remove a Rule

To delete a rule from the ACL, select the x symbol to the far right of the rule.

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Save Changes to an ACL

To save changes to the ACL rules, select the Save button below the ACL.

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The Save button will be surrounded by an amber bar if there are unsaved changes on the page.

It may take 1-2 minutes for the changes to the ACL to propagate from the Meraki dashboard to the switches in your network.

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