Spam filter USG Flex 100h

Hi @rve5800,

The Zyxel USG FLEX 100H, part of the USG FLEX H Series, offers robust security features, but it does not have a dedicated "Spam Filter" option as you might have experienced with older firewall models. Instead, its anti-spam capabilities are integrated within broader security services like the Reputation Filter, Content Filter, and Anti-Malware. These services work together to protect against various threats, including spam.

Here's how you can leverage the existing features for spam protection:

• Reputation Filter: This service blocks traffic from IP addresses, URLs, or domain names identified as malicious or suspicious. Spammers often use known malicious sources, so this feature can help in blocking unwanted emails. The USG FLEX H series supports IP Reputation, DNS Threat Filter, and URL Threat Filter.

  • You can set a block list in the IP Reputation Filter by navigating to Security Services > Reputation Filter > IP Reputation > Block List in the web GUI.
  • For DNS and URL Threat Filters, you can add specific sites to an allow list to bypass malicious site blocking if needed.

• Content Filter: This feature allows you to filter web traffic based on categories and predefined rules, which can indirectly help in mitigating spam-related content or access to known spam-generating sites.

  • Content Filter settings can be managed via the Nebula Control Center (NCC) or through the local Web GUI.

• Anti-Malware: The Anti-Malware engine scans for malicious content, including those that might be delivered via spam. The latest firmware updates for the USG FLEX H Series even include real-time scanning of HTTP uploads.

To provide you with the most accurate and tailored guidance, please provide the following additional information:

• Firmware Version: The current firmware version running on your USG FLEX 100H.
• Network Topology: A brief description or diagram of your network setup.
• Specific Spam Concerns: Are you looking to block spam emails, prevent access to spam-related websites, or something else?

If you are managing your USG FLEX 100H through Zyxel Nebula Control Center (NCC), please enable Zyxel Support Access via Help > Support Request in your Nebula console and provide your Organization or Site name. This will allow our support team to view your cloud environment configuration directly, which can significantly speed up the troubleshooting process.