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Configure IPv4 Firewall on your Actiontec C1900A modem

Enabling the IPv4 Firewall is optional. When the firewall is activated, security is enhanced, but some network functionality will be lost.
Modem Advanced Step 1-3
  1. Connect a device directly to your modem.
  1. Open a web browser and go to http://192.168.0.1.
  1. Login to your modem by entering the Admin Username and Admin Password, then select "Apply." If your modem is using the default settings, this information is located on the modem sticker.
Learn more about password security best practices.
  1. Select "Advanced Setup."
  1. Select "IPv4 Firewall."
  1. From here you can view or edit the "IPv4 Firewall" settings.
Stealth Mode: yeah it sounds cool, but don't enable it unless you understand the technical impacts. Enabling stealth mode prevents the router from responding to probing requests. The router will still answer incoming requests for authorized apps. Unexpected requests, such as ICMP (ping) are ignored.
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