How to Block Gambling Sites on Your Network

Q: Will blocking gambling break sports news sites?

It should not if the data separates sports news from betting. Sports sites with odds sections may carry Gambling as a secondary category, which lets you decide.

Q: Is gambling a CIPA category?

CIPA itself targets obscene, child sexual abuse and harmful-to-minors images. Gambling is not named in the law, but nearly every school filter blocks it as part of its internet safety policy.

Online gambling is no longer just casinos and bookmakers. It now includes sweepstakes casinos, prediction markets, skin betting and crypto casinos, many of them on domains that change every few weeks.

This guide covers what to block, where to block it and how to keep the block working when operators open new domains.

What a gambling block should cover

Online casinos and slots
Sports and esports betting
Online poker and bingo
Lottery ticket sellers
Sweepstakes and social casinos
Prediction and event markets
Skin and loot betting
Crypto casinos
Betting tipster sites
Casino affiliate and bonus sites

Why organisations block gambling sites

Each type of organisation has a different reason. Knowing yours tells you how strict the rule needs to be and whether grey-zone sites belong in it.

Employers

Productivity, misuse of company devices and the reputational risk of gambling on work time. Payment card fraud often starts with gambling top-ups.

Schools and colleges

Students are below the legal gambling age in most places. Betting ads and skin sites target young gamers.

Families and individuals

A home block supports someone trying to stop, and protects children on shared devices.

ISPs and public Wi-Fi

Some countries require network operators to block unlicensed gambling operators listed by the regulator.

Banks and regulated firms

Traders and staff with access to client money are often barred from gambling on work systems as a conduct rule.

Support and treatment services

Clinics, shelters and recovery housing block gambling on resident Wi-Fi as part of care.

The grey zones: what counts as gambling?

Most blocking mistakes happen at the edges. Here is how common site types are usually treated. Legal status differs by country and US state, so this is a filtering view, not legal advice.

Site type	What it offers	Typical filter action	Why
Online casinos and slots	Real-money casino games	Block	Core gambling
Sports and esports betting	Wagers on match results and events	Block	Core gambling
Poker and bingo	Real-money games against other players	Block	Core gambling
Sweepstakes and social casinos	Casino-style play with virtual coins that can lead to prizes	Block	Same experience and risk as casinos for most users
Prediction and event markets	Trading contracts on outcomes such as elections or sports	Review, usually block	Legal status contested; works like betting for users
Skin and case-opening sites	Betting or opening cases with in-game items that have cash value	Block	Aimed at young gamers
Crypto casinos	Casino games paid in cryptocurrency	Block	Often unlicensed and offshore
State lotteries	Official lottery tickets and results	Policy choice	Legal and regulated; some employers allow results pages
Fantasy sports	Paid contests based on player stats	Policy choice	Treated as gambling in some places, as skill games in others
Tipsters and odds comparison	Picks, odds and bonus codes	Block	Funnels users to operators
Sports news with odds	News site with a betting section	Allow	Gambling as secondary category only
Gambling help and research	Support lines, research, regulators	Allow	Must stay reachable

The last row matters most. Never let a gambling rule block help services or the regulator's site. Good category data puts those in Health & Medicine or Government & Legal, not Gambling.

The full scope of the category is on the gambling category page. Skin sites often sit next to gaming sites, so check both rules.

Why we do not list gambling domains here

For apps like a single chatbot, a short domain list is a useful start. For gambling it is close to useless. These are the reasons, and they point straight at the method that works.

Tens of thousandsof domains that offer or promote gambling

Mirrorsoperators open new domains when old ones are blocked

Affiliatesthousands of review and bonus sites that funnel users

~300,000new domains categorized by us every day

There is also a quality problem with lists. Many free gambling lists online mix in dead domains, parked pages and help services, which leads to both gaps and false blocks.

A category rule handles all of this. To see how a particular site is categorized, use the website category lookup; for a list of hosts from your logs, use bulk categorization.

Methods to block gambling sites

Each method below shows how much effort it takes and what it covers. Most networks combine a DNS or firewall rule with device policies.

Home or office router

Log in to the router and set its DNS servers to a filtering resolver with a gambling category.
Turn on any built-in parental control profile that blocks gambling.
Block outbound DNS to other servers if the router allows it.

Covers: every device on that Wi-Fi

DNS filter

Enable the Gambling category in each policy.
Return a block page that mentions support options, not just "denied".
Block DNS over HTTPS hosts and set browsers to use system DNS.
Use a roaming agent on laptops to cover them off-site.

Covers: all devices using the resolver

Firewall or web gateway

Set the vendor's gambling category to block in the web filter profile.
Add an external dynamic list for grey-zone sites your policy treats as gambling.
Apply to staff and guest networks.
Keep help services on an allow list above the block.

Covers: all traffic through the firewall

Intune

Use Intune to push a web filter agent or DNS profile that blocks the Gambling category for the right device groups.
Make sure the filter covers every browser, not only Edge.
Add custom block entries for any sites the category misses.

Covers: managed Windows devices anywhere

Google Admin console

Under Devices, Chrome, Settings, URL blocking, add patterns from a gambling list.
Block casino game extensions and apps for student units.
Pair with a DNS or network filter, since a manual list will never be complete.

Covers: managed Chrome and Chromebooks

MDM and phone controls

Block betting and casino apps or limit installs to an approved list.
Use age ratings and content restrictions on family phones.
Push a DNS profile so mobile data uses the filter too.

Covers: phones and tablets on any network

Firewall category names vary.

Blocking for someone who wants to stop gambling

A network block is strongest when it is one of several barriers. These tools work alongside the filter and do not depend on any device.

National self-exclusionSome countries run schemes that exclude a person from all licensed operators at once. In Great Britain, GAMSTOP covers licensed online operators.

Bank gambling blocksMany banks let customers block card payments to gambling merchants from their app.

Operator limitsLicensed operators offer deposit limits, time-outs and self-exclusion in the account.

Device blocksA filter on the phone and laptop covers mobile data and other Wi-Fi networks.

Support servicesHelplines and counselling services. Make sure your filter allows them.

Unlicensed offshore sites ignore self-exclusion schemes. That is exactly the gap a category filter fills, because it blocks by what the site is, not by who licensed it.

Gambling policy by type of network

One organisation often runs several networks. Write a row for each one, because the right answer for a staff laptop is not always right for a guest network.

Network	Core gambling	Grey zone	Lotteries and fantasy	Help services
Corporate staff network	Block	Block	Policy choice	Allow
Trading floor or client money teams	Block	Block	Block	Allow
School students	Block	Block	Block	Allow
Public library	Block on children's terminals	Per library policy	Per library policy	Allow
Hotel or cafe guest Wi-Fi	Often open to adults	Often open	Allow	Allow
Recovery or support housing	Block	Block	Block	Allow

Regulator blocking orders for ISPs and network operators

In some countries, the gambling or communications regulator keeps a list of unlicensed operators and directs internet providers to block them. Australia's communications regulator, for example, has issued such directions for illegal offshore gambling sites.

Regulator listsOfficial lists are short, authoritative and slow. Load them exactly as issued, as a separate rule you can show an auditor.

Category dataCovers the much larger set of mirrors and new domains between official updates, for networks that block gambling as policy.

Keep them apartReport legal orders and policy blocks separately, so customers and regulators can see which rule did what.

Check the rulesRequirements differ by country. Check the current guidance from your own regulator.

ISPs and telecom operators building this into their service can read ISP web filtering for how category data fits next to legal block lists.

What to show on the block page

Sample text: "This site is in the Gambling category and is blocked on this network under our internet use policy. If you think this is wrong, contact the IT helpdesk. If gambling is causing you problems, free and confidential support is available."

Betting apps vs browser sites

Sports betting in particular has moved to phone apps. Plan for both.

Browser

DNS, firewall and browser rules all apply
Block page can show support options
Mirror domains are caught only by a category that updates daily
Affiliate and bonus sites are part of the same rule

Apps

Network rules only apply on your Wi-Fi
App store availability differs by country and licensing
Some casino apps are packaged as games
MDM or parental controls are the only off-network control

VPN bypass and other workarounds

Gambling operators sometimes promote VPN use themselves, especially in places where they are not licensed. Close each route.

VPN apps and proxiesBlock the VPN, proxy and anonymizer category and restrict app installs on managed devices.

Mirror domainsUse category data with daily updates for newly registered domains.

Crypto casinosBlock Gambling and review the Cryptocurrency category for staff who have no business need.

Encrypted DNSDisable DNS over HTTPS in browser policy; block known DoH resolvers.

Gambling in game launchersSkin sites reached from gaming communities: block the sites and manage the launcher apps.

Mobile dataDevice-level filter or MDM profile; the network rule cannot help.

How to test your gambling block

Pick test sites from each row of the grey-zone table, not just one big brand. Then check that the allowed rows still load. Repeat the tests every few months, since operators change domains often.

TEST 1

Open a well-known casino and a betting site in a private window.

Expect: block page

TEST 2

Search for a casino bonus code and click an affiliate site.

Expect: block page

TEST 3

Open a sweepstakes casino and a skin betting site.

Expect: block page, if policy says so

TEST 4

Open a sports news site and a gambling help service.

Expect: both load

TEST 5

Try to install a betting app on a managed phone.

Expect: install refused

TEST 6

Repeat test 1 with a consumer VPN switched on.

Expect: VPN blocked

Common mistakes with gambling blocks

Most failed gambling blocks fail in the same few ways. Check yours against this list after setup.

Blocking help servicesA keyword rule on "gambling" or "casino" also blocks support lines and research. Use categories, not keywords.

Forgetting affiliatesBonus code and review sites keep pushing users to operators. They belong in the same rule.

Ignoring the guest networkStaff and students simply switch Wi-Fi. Decide guest policy on purpose.

Static listsA list from last year misses this month's mirrors. Use data with daily updates.

No loggingWithout logs you cannot see repeated attempts, which can be a sign that someone needs support.

Treating games as safe by defaultCasino-style mechanics in games and skin sites reach younger users first.

Category-based blocking with our database

Our Gambling category is one of 59 web filtering categories, and it is part of the set most schools and parental control products block. Vendors use it to keep gambling rules current without manual lists.

What you need	What the data provides
Coverage	120 million categorized domains; the 20 million most visited cover 99.99% of web traffic
New mirror domains	About 300,000 newly registered domains categorized each day, rechecked after a week and a month
Grey-zone handling	Several ranked categories per domain, for example Gambling with Cryptocurrency or Gaming
Fewer false blocks	Sports news keeps its main category, with Gambling only as a secondary where relevant
Formats	CSV, Parquet or JSON, plus exports such as RPZ, EDL, hosts files and AdGuard or Pi-hole style lists
Lookup	An API included with licences for real-time checks

Export types are explained in blocklist formats. Schools can read K-12 web filtering, and financial firms banking web filtering.

Frequently asked questions

Can I block all gambling sites with a list?

Not reliably. There are tens of thousands of gambling domains and operators open mirror domains often. A category rule fed by daily-updated data is the practical way.

Does blocking gambling on the network help someone with a gambling problem?

It removes easy access on that network, which helps, but it is one layer. Self-exclusion schemes where available, bank gambling blocks and support services work alongside it.

Are sweepstakes casinos and prediction markets gambling?

Legal status differs by country and state. For filtering, most organisations treat real-money or prize-linked play the same as casinos and betting.

Will blocking gambling break sports news sites?

It should not if the data separates news from betting. Sports sites with odds sections may carry Gambling as a secondary category, which lets you decide.

Is gambling a CIPA category?

CIPA targets obscene, child sexual abuse and harmful-to-minors images. Gambling is not named in the law, but nearly every school filter blocks it as part of the internet safety policy.

How do I find out if staff are gambling at work?

Run a report on blocked or allowed hits in the Gambling category from your DNS filter or firewall. Check local employment and privacy rules before you review named individuals.

Do loot boxes count as gambling?

Regulators disagree, and rules differ by country. Loot boxes sit inside games, so a URL filter cannot block them alone. Skin betting and case-opening sites outside the game can be blocked by category.

Which category do crypto casinos fall into?

Gambling, usually with Cryptocurrency as a second category. A gambling rule blocks them even if crypto sites are allowed for some users.

Should guest Wi-Fi block gambling?

Many hotels, cafes and venues leave it open for adults. Hospitals, schools, libraries and family venues usually block it on every network.

Keep gambling blocks ahead of mirror domains

License a gambling category that updates daily, inside your filter, firewall, DNS service or parental control app.

License the database

GAMSTOP is a trademark of its owner. Microsoft, Intune and Edge are trademarks of Microsoft Corporation. Google, Chrome and Chromebook are trademarks of Google LLC.

AdGuard and Pi-hole are trademarks of their respective owners. These names are used here only to identify the products and services discussed. Web Filtering Database is not affiliated with, sponsored or endorsed by any of these organisations.