Netgear M4300-24X24F (XSM4348S) - Stackable Managed Switch with 48x10G including 24x10GBASE-T and 24xSFP+ Layer 3 Guia Do Administrador

A screen similar to the following displays.

b.  In the CP ID list, select 1.

c.  Click Unit 1. The ports display.

d.  Click the gray box under port 1. 

e.  Click Apply.

User verification can be configured to allow access for guest users—users who do not have 
assigned user names and passwords. User verification can also be configured to allow 
access for authenticated users. Authenticated users are required to enter a valid user name 
and password that must first be validated against the local database or a RADIUS server. 
Network access is granted once user verification has been confirmed. The administrator can 
block access to a captive portal configuration. When an instance is blocked, no client traffic is 
allowed through any interfaces associated with that captive portal configuration. Blocking a 
captive portal instance is a temporary command executed by the administrator and not saved 
in the configuration. 

(Netgear Switch)(Config-CP 1)#block