Allow or Block IP Addresses in a WAF

What is an IP address?

An IP address is a number that identifies a device or connection on the internet. It is like a home address for your computer. An example is 203.0.113.25.

What are a whitelist and a blacklist?

A whitelist is a list of addresses that are always allowed. Many tools now call it an "allow list".

A blacklist is a list of addresses that are always blocked. Many tools call it a "block list" or "deny list".

A WAF is a Web Application Firewall. It guards your website. IP rules tell the WAF who may pass and who may not.

When to use each one

• Allow: your own office or home, so the WAF never blocks you by mistake.
• Allow: a service that must reach your site, such as a payment company.
• Block: an address that keeps trying to break in or floods your site.

Steps

1. Find the IP address you want to add. To find your own, search for "what is my IP" in your browser.
2. For an attacker, find the address in your WAF log or access log.
3. Open your WAF dashboard. Ask Hostvento support where it is if you are not sure. You can open a support ticket.
4. Look for a menu named IP Access, IP Rules, Allow List or similar. The exact name differs between tools.
5. Click Add.
6. Type the IP address.
7. Choose the action: Allow or Block.
8. Add a short note, such as "Office" or "Spam bot". This helps you remember later.
9. Click Save.
10. Test the rule. Visit your site from the allowed or blocked address and check the result.

Blocking a whole range

Some tools accept a range written like 203.0.113.0/24. The part after the slash tells how many addresses are covered. Be careful. A range can block many innocent visitors.

Home internet addresses often change. If your allowed address changes, update the list.

Quick recap

• A whitelist allows addresses. A blacklist blocks them.
• Allow your own address and trusted services.
• Block addresses that attack or flood your site.
• Add a note to every rule.
• Test the rule after saving.