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Cisco Meraki

Block Listing and Allow Listing Clients

In some cases, it is necessary to allow list or block a specific client on a Cisco Meraki Network. This configuration is completed on a client by client basis and will affect the client immediately. allow listing and Blocking can be done on both the Cisco Meraki MX Security Appliances and the MR Access Points. At this time it is not possible to add a client to the allow list or block list on a Cisco Meraki Switch. 

Client policies are configured on a device once it is listed in the network client list, it is possible to Pre-Configure the network policy for clients that aren't listed.   

Built-in Client Policies

There are two built-in policies that can be configured for a client; allow list and blocked. Normal is the default setting for every client subjecting the client to all of the network wide settings. If configured, group policies can also be applied to the client in the same manner as detailed below. 

Allow List

Applies the following settings to a client:

  • Is exempt from all firewall rules, both Layer 3 and Layer 7 (Applies to both the MX Security Appliance and the MR Access Points)
  • Bypasses AMP
  • Bypasses Site to Site VPN outbound rules
  • Restricted Youtube content will NOT be bypassed by allow listed clients as it is NOT considered part of Content Filtering.
  • IDS/IPS under Security and SD-WAN->Threat Protection will NOT be bypassed.

 

Note: The device is still subject to association requirements and per-SSID bandwidth limits on MR Access Points, as well as Uplink Configuration and Security Filtering on a MX Security Appliances. 

Note: If a device is allow listed in a network that is bound to a template, that client will be allow listed on all other networks bound to that template. Conversely, if the client is removed from the allow list on one bound network, it will also be removed from the allow list on all others.

Block

Applies the following settings to a client:

  • Firewall rule applied to block all communication with other devices on the Network (Only applies to traffic that traverses the Cisco Meraki Device that has the block is configured)
  • Blocked Splash Page will be displayed when user tries to load a web page

 

Note: The device will still receive an IP address and will be able to resolve DNS names.   

Blocking or Allow listing a Client 

There are two ways to allow list or block a client on the Cisco Meraki Dashboard.

Note: There is a limit of 3000 clients for allow listing and 3000 clients for blocking. An error will appear when attempting to allow list or block more than 3000 clients.

Using the Clients List

Navigate to  Network-Wide > Clients, then check the boxes of the clients that you want to allow list or block. Click on the Policy drop down above the client list, and select blocked or allow listed. To apply the allow list or block on a per SSID basis or only on the MX Security Appliance, select Different policies by connection and SSID. To clear the setting, remove the blocked or allow listed policy and select normal.

 

Note: The single configuration pane to block and allow list users on the security appliance and the SSIDs is only available when on a combined network. These settings would have to be completed on each Dashboard Network for uncombined networks. 

 

After this is completed it is possible to filter clients to determine which ones have a policy configured on them.

 

If the client has never connected to the network, or is not in the client list, it can still have a policy applied. This is done using the Add client button on the Network-wide > Monitor > Clients page. Enter a friendly name for the device, its MAC address, and then which policy you would like applied. Then click Save changes.

Using the Client Details Page

The current policy will be shown and can be updated at the client details page. Like above, to apply the allow list or block on a per SSID basis or only on the MX, select the Different policies by connection and SSID. The options listed will allow you to configure blocked or allow listed per SSID and on the MX Security Appliance. To clear the setting, remove the blocked or allow list policy and apply normal. Below is where the setting would be configured with a combined network:

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