How to Block Gambling Sites with DNS Filtering

Why block gambling sites?

People block gambling sites for different reasons. Parents want to keep children away from online casinos and betting apps. Employers include gambling in their acceptable use policies. Schools block it as a matter of course. And many adults choose to block gambling on their own devices as part of managing or recovering from problem gambling. DNS filtering supports all of these goals by stopping gambling domains from resolving on every device that uses the filter.

How DNS gambling blocking works

A DNS filter with a gambling category keeps a list of domains used by online casinos, sports betting, poker, lotteries and similar services. When a device looks up one of those domains, the resolver returns a blocked answer instead of the real address. The website or app fails to connect, whether it is opened in a browser or through an installed app. [VERIFY: category list source and update frequency for FirewallDNS]

Because the block applies to the whole network, it covers phones, tablets, laptops and consoles together, without installing software on each device.

Setting it up

With FirewallDNS, the setup takes a few minutes.

• Create an account and register your public IP address in the dashboard
• Enable the Gambling category
• Enable malware and phishing protection as well
• Set your router's DNS servers to the FirewallDNS addresses
• Test by visiting a well-known betting site; it should fail to load

Gambling apps and in-app content

Most gambling apps rely on their own domains to load odds, games and accounts, so blocking those domains at DNS usually stops the app working on your network. Some apps use content delivery networks shared with other services; if an app continues to work, check the query log while opening it, identify the domains it uses and add them to your blocklist.

Gambling-like features in games, such as loot boxes, are typically delivered through the game's own servers and cannot be blocked separately without blocking the game. Use the game platform's parental controls and spending limits for those.

Stopping workarounds

DNS filtering is only effective if devices actually use it. A determined user can switch the device's DNS server, use a VPN or browser-level encrypted DNS, or simply use mobile data. You can make this much harder.

• Block outbound DNS on ports 53 and 853 to other servers on your router or firewall
• Disable or lock secure DNS settings in browsers on managed devices
• Restrict installing VPN apps with device controls
• Use an encrypted DNS profile on phones so filtering also applies on mobile data [VERIFY: per-device DoH/DoT availability]

If you are blocking gambling for yourself

If you are using DNS filtering to help manage your own gambling, that is a sensible step, and it works best combined with other barriers. Many countries operate self-exclusion schemes that block you from licensed gambling operators. [VERIFY: link national self-exclusion schemes, e.g. GAMSTOP in the UK or Spelpaus in Sweden, before publishing] Banks increasingly offer gambling transaction blocks on cards. Dedicated gambling-blocking software can add device-level protection that is harder to undo on impulse.

Free, confidential support is available from gambling support services and helplines. [FILL IN: helpline links for your target countries] Talking to someone you trust also helps. A DNS filter is one tool; it is not a substitute for support.

Workplaces and schools

For workplaces, blocking gambling reduces distraction and legal risk and supports acceptable use policies. For schools, it is a standard part of content filtering. In both cases, enable the gambling category on the network, block outbound DNS to other resolvers at the firewall, and tell users that filtering is in place. The query log shows whether gambling sites are being attempted, which can be useful information for safeguarding or HR processes, handled in line with your privacy policy.

Handling mistakes

Category lists are not perfect. Occasionally a sports news site, a lottery results page or a charity raffle is blocked. If something legitimate is caught, check the query log for the reason and add the domain to your allowlist. If a gambling site gets through, add it to your blocklist; every device is protected immediately.

Limitations

DNS filtering cannot stop gambling on devices outside your network, such as a phone on mobile data without an encrypted DNS profile. It cannot block gambling advertising embedded in sports streams or social media feeds without blocking those services. And it cannot address the underlying reasons someone gambles. Combine it with device controls, financial blocks and support where relevant.

Why network-wide blocking helps

Gambling is easy to start on impulse, often late in the evening and often on a phone. Barriers that take effort to remove give you time for second thoughts. A DNS block set on the home router covers every device in the house, including a tablet borrowed from a family member or a laptop you rarely use, and it cannot be switched off from the phone in a few taps. Asking a trusted person to hold the router password or the FirewallDNS account password adds a further step that makes impulsive changes harder.

This is the same principle many recovery approaches use: reduce easy access, add friction and combine several barriers rather than relying on willpower alone.

Testing and checking the block

After enabling the category, test a few well-known betting and casino sites from different devices on your network. They should fail to load. Then open the query log in your dashboard and confirm the attempts appear as blocked with the gambling category as the reason. If a site loads anyway, check whether the device is using a VPN, browser-level secure DNS or mobile data.

Review the log periodically. New gambling sites appear regularly, and checking for allowed gambling domains you do not recognise lets you add them to your blocklist straight away.

Adverts and affiliates

Gambling operators advertise heavily, and affiliate sites that review casinos or offer bonuses are designed to send visitors onward. Many affiliate sites fall into the gambling category and are blocked along with the operators. Adverts shown inside social media, sports streaming or video platforms are harder to block, because they come from the platform's own domains. Most platforms let you limit gambling advertising in their ad settings, and some countries restrict such advertising by law; turning those settings on reduces triggers further.

Summary

DNS filtering is a quick, network-wide way to block gambling sites and apps. Enable the gambling category, point your router at your DNS filter and block DNS bypass routes. For personal recovery, combine it with self-exclusion schemes, bank blocks and professional support. FirewallDNS includes a gambling category alongside adult content and social media filtering, priced at $2.90 per device per month.