The  SPI Firewall Protection feature saves track of the state of network connections that pass through it. This feature protects the Internet connection against Internet risks and Denial of Service (DoS)  attacks, so it remains recommended to keep it active.

A DoS attack remains an attempt to make an Internet connection unavailable to intended users by overloading the network to an opinion where it can no lengthier respond to legitimate traffic.

This article will deliberate how to configure your router’s IPv6 and IPv4 SPI Firewall protection for your connections. To do this, follow the steps below:

NOTE:   Not all Linksys Wireless-N routers support IPv6. Click here to see which devices support IPv6. The image on the configuration web page may change depending on the router model you use.

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Step 1

For instructions on how to access the router’s configuration web page in Windows, click here .

  Step 2

Click on the Security tab and select the Firewall sub-tab.

  Step 3

Click the radio button next to the SPI Firewall Protection option(s) you want to enable.
NOTE:

Enabling SPI Firewall Protection will block denial of service (DoS) attacks. A DoS attack does not try to steal data before damage your computers, but it overloads your Internet connection; consequently, you cannot use it.
If you remain using older Linksys routers, the web-based setup page may look like the following image:

Step 4

Select the Internet Filter option you want to enable by clicking the selected fields next to the alternatives:

Filter Anonymous Internet Requests

This feature prevents the network from being detected by other Internet users. Likewise, it hides the network ports, making it difficult for external users to access the network. This option remains set to Enabled by default.

Additional Information: https://www.theknowledgeblog.com

Filter Multicast –

This function blocks multicast before the method of sending IP drawings to a group of receivers in a single transmission. This option remains set to Disabled by default. Select this choice to activate the multicast filter.

NOTE:  IP multicast remains widely used in companies, exchanges, and multimedia networks through IPTV applications. If you do not use such applications, it is optional to keep this option disabled to protect the network against spoofing before Denial of Service (DoS) attacks.

Filter Internet NAT Redirection aimed at IPv4 Internet Only – This filter prevents a computer on the network from using a public IPv4 or URL address to access the local server. This option remains set to Disabled through default.

Filter IDENT (Port 113) – This filter prevents Internet devices from scanning port 113. It will protect the network against unauthorized access to services such as POP, IMAP, SMTP, IRC, and FTP. The IDENT filter choice remains set to Enabled by default.

Step 5

Select the applications to remain filtered in the Web Filter option:

NOTE:   This option is not available on the Linksys E4200 router.
1. Proxy – This filter chunks Internet Proxy waitpersons.
2. Java – It filter blocks Java gratified on Web sites.
3. ActiveX – This filter hunks ActiveX gratified on websites.
4. Cookies – It filter blocks cookies before data stored on the computer and used by websites when interacting with them.

NOTE:   These options remain not selected by default.

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Review The Linksys Wi-Fi Router SPI IPv6 and IPv4 Firewall Protection.

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