Picture a Friday afternoon at a 20-person office off Stemmons Freeway. It’s 4:45. Your office manager gets an email: “Your FedEx package couldn’t be delivered. Reschedule here.”

She clicks. It happens to good, careful people every single day.

Now here’s the part most business owners never think about. Before that fake page can load, her computer has to ask the internet one question: “Where is this website?” That question is a DNS lookup. And it’s the perfect place to stop the attack.

That’s what DNS filtering in Dallas is really about. Instead of hoping your antivirus catches the damage after it lands, you block the bad destination before anything downloads.

We’ve set this up for businesses all over Dallas-Fort Worth, and in this guide I’ll walk you through it the way I’d explain it across the table. We’ll cover what DNS filtering is, how it works, what it blocks, why Dallas companies need it now, how it compares to your firewall and antivirus, how to roll it out, and what drives the cost.

No jargon walls. Just what you need to make a good decision.

What Is DNS Filtering?

DNS filtering is a security check built into the internet’s “phone book” that refuses to connect your devices to dangerous or unwanted websites.

Let’s back up one step. Every website has a numeric address, like 104.18.32.7. People don’t remember numbers, so we type names like ightysupport.com. DNS (the Domain Name System) is the service that translates the name into the number. Your devices do this hundreds of times a day, usually without you noticing.

Normally, DNS answers every question it’s asked. Ask for a legitimate bank site, you get an address. Ask for a phishing site built last Tuesday, you also get an address. It doesn’t judge.

DNS filtering changes that. Before answering, the filtered DNS service checks the domain against live threat intelligence and your company’s rules:

Known bad or suspicious? Blocked. The user sees a simple warning page.
In a category you’ve restricted (gambling, adult content, streaming)? Blocked or allowed based on your policy.
Safe and allowed? Answered instantly. The user never notices anything happened.

What Is Protective DNS?

You’ll also hear the term protective DNS (PDNS). It’s the name U.S. government agencies use for the same idea, with the emphasis on security rather than content control. When you see a vendor call itself a “protective DNS platform,” it’s talking about DNS filtering focused on threats.

Why Your Internet Provider’s DNS Isn’t Enough

Most Dallas offices use whatever DNS their internet provider hands out, whether that’s AT&T, Spectrum, Frontier or a building-supplied connection. Those resolvers are built for speed, not security. They’ll happily point your staff to a brand-new phishing domain because nobody told them not to.

Switching to a business DNS security service is usually a settings change, not a hardware project. That’s why it’s one of the first things we look at in a security assessment.

How Does DNS Filtering Block Malicious Websites?

It blocks the lookup, so the connection to the bad site never starts. Here’s what happens in the second after someone clicks a link:

The click. Your employee clicks a link in an email, a search result or a pop-up ad.
The question. The device asks the DNS resolver, “What’s the address for this domain?”
The check. The filtered resolver compares the domain against threat intelligence (known malware, phishing, command-and-control servers, newly registered look-alike domains) and your company’s category rules.
The decision. Safe and allowed: the address comes back and the page loads normally. Malicious or restricted: no address comes back. Instead, the user lands on a block page.
The record. The attempt is logged, so your IT team can see who tried to reach what and follow up if a device looks infected.

The whole check takes a few milliseconds. Good providers run global “anycast” networks, which simply means your request gets answered by the nearest data center, including ones in or near Dallas. Most users notice no slowdown at all, and some see browsing get a bit faster.

A few details that matter more than they sound:

It covers every app, not just the browser. Email clients, Teams, background updaters and sketchy browser extensions all use DNS too.
It works for HTTP and HTTPS, IPv4 and IPv6. Encrypted traffic still needs a DNS lookup first, so DNS filtering sees it without decrypting anything.
Threat lists update in minutes. Top providers use machine learning to flag suspicious domains before they appear on public blocklists.

Major platforms like Cisco Umbrella DNS-layer security, DNSFilter, ScoutDNS and Webroot DNS Protection all follow this same basic model. They differ in reporting, policy controls, roaming agents and price, which we’ll cover further down.

What Online Threats Does DNS Filtering Stop?

DNS filtering stops threats that need to reach a website or server to work, and that’s most of them. Cisco’s security research has long reported that over 90% of malware uses DNS at some point, whether to download more code, receive instructions or send stolen data out.

Threat	What it looks like in a Dallas office	How DNS filtering helps
Phishing	Fake Microsoft 365 login, fake bank or FedEx page	Blocks the fake domain even after the user clicks the email link
Malware and ransomware	A “PDF invoice” or fake software update that pulls down malicious code	Blocks the download server, so the payload never arrives
Botnet / command-and-control	An already-infected laptop quietly “phoning home” for instructions	Cuts the call-home, limits the damage and flags the device
Business email compromise follow-ups	Look-alike domains (ightysuport.com) used to trick staff into wire transfers	Blocks newly registered and look-alike domains
Cryptojacking	Hidden scripts mining crypto on your PCs, slowing everything down	Blocks known mining domains
Malicious ads	Poisoned ads on normal websites that redirect to scams	Blocks the redirect destination
Fast-flux domains	Attacker infrastructure that changes IPs every few minutes to dodge blocklists	Stronger providers detect the pattern and block the domain

That last one isn’t theoretical. In 2025, CISA and partner agencies issued an advisory on fast flux, and they specifically encouraged organizations to use protective DNS services that can detect and block it.

What DNS filtering won’t stop: an attachment already sitting in someone’s inbox that runs without contacting the internet, or a USB stick from the parking lot. That’s why it works alongside endpoint protection, not instead of it.

Why Dallas Businesses Need DNS Filtering Now

Texas is one of the most targeted states in the country, and most attacks on small businesses start with a single click.

The numbers from the FBI’s 2025 Internet Crime Report are hard to ignore:

The FBI logged 1,008,597 complaints and roughly $20.9 billion in reported losses in 2025, up 26% from 2024.
Texans filed 97,912 complaints, placing Texas among the top three states alongside California and Florida.
Business email compromise alone cost victims about $3 billion. Many of those scams rely on look-alike domains and fake login pages.
For context, Texans reported $1.35 billion in losses in 2024, when Texas ranked second nationally for complaints.

And remember, those are only the incidents people reported.

There’s also a Dallas-specific reason this matters. DFW’s economy is heavy on exactly the industries attackers love: healthcare, legal, financial services, real estate, logistics and professional services. They hold patient records, client funds and wire-transfer authority. A single stolen password in a title company or a dental office can turn into a very expensive afternoon.

Then there’s how we work now. Your team isn’t just in the office on N Lamar or in Legacy West. They’re working from home in Frisco, from a coffee shop in Bishop Arts, or from a hotel on a sales trip. The moment a laptop leaves your office network, your office firewall stops protecting it. DNS filtering with a roaming agent keeps protecting it anyway.

If you’re a smaller shop, we cover the bigger picture in our guide to cybersecurity for small businesses in Dallas.

Why the NSA and CISA Recommend Protective DNS

Two of the country’s top cyber agencies publicly recommend protective DNS as a key defense, and that’s a strong signal for any business owner.

The National Security Agency and CISA published joint NSA and CISA guidance on protective DNS, first released in 2021 and updated in March 2025. The short version:

Protective DNS can significantly reduce the effectiveness of ransomware, phishing, botnet and malware campaigns by blocking known-malicious domains.
DNS logs are valuable for incident response and threat hunting, because they show exactly which devices tried to reach which bad domains, and when.
Organizations should evaluate a provider’s capabilities against their own needs, not just pick the cheapest option.

The NSA even ran a protective DNS pilot for defense contractors, and CISA runs a protective DNS resolver for federal agencies.

Here’s why that matters to you: the same layer of defense that federal agencies rely on is now available as an affordable cloud service for a 10-person office in Richardson. You don’t need a federal budget to get federal-grade DNS protection.

Key Benefits of DNS Filtering for Businesses

The biggest benefit is simple: fewer bad clicks turn into real incidents. But there’s more to it than security.

Fewer Infections, Fewer Tickets, Less Downtime

Every malware infection you prevent is a laptop you don’t have to wipe, a morning your staff doesn’t lose, and a potential breach you never have to report. When we roll out secure DNS for businesses, the drop in “my computer is acting weird” tickets is usually one of the first things clients notice.

Control Over What Gets Used on Company Time

DNS filtering lets you block whole categories, like gambling, adult content, illegal downloads or high-bandwidth streaming. You can set different rules for different groups. Marketing gets social media; accounting doesn’t. Guest Wi-Fi gets a stricter policy than staff.

Protection That Follows Remote Workers

A small roaming agent on each laptop keeps filtering active at home, in a hotel or on airport Wi-Fi. For hybrid teams across DFW, this closes one of the biggest gaps in a typical small-business setup.

Safer Guest Wi-Fi and Office Networks

Clients, patients and visitors connect to your Wi-Fi every day. DNS filtering keeps that traffic clean without buying another appliance. It pairs well with a properly segmented network, which starts with good physical infrastructure from our network cabling services in Dallas.

Visibility You Didn’t Have Before

Reports show which devices hit risky domains, which apps staff actually use (“shadow IT”), and trends week to week. For compliance and cyber insurance, that visibility is gold.

No Hardware, Quick Setup

Most deployments are a DNS settings change plus an agent rollout. No rack space, no appliance refresh every few years.

What It Looks Like in Real Dallas Businesses

Here’s how DNS filtering for businesses plays out in the kinds of offices we support every week:

Business type	Typical risk	How DNS filtering is set up	Result the owner cares about
Small office (8–15 people, e.g. accounting or insurance agency in Addison)	Phishing emails, fake invoices, staff browsing on shared PCs	Security categories on for everyone, light content rules, agent on laptops	Fewer infected PCs, less downtime during tax or renewal season
Medical or dental office (Plano, Uptown)	Ransomware, patient data exposure, HIPAA pressure	Strict security policy, separate policy for patient Wi-Fi, logs kept for audits	Stronger HIPAA security posture, a filtered guest network patients can use
Retail store (Deep Ellum, Galleria area)	POS malware, card data theft, public Wi-Fi abuse	POS devices on a locked-down policy, guest Wi-Fi filtered, staff devices separate	Supports PCI-DSS efforts, keeps the checkout network clean
Warehouse or distribution center (Alliance, south Dallas)	Shared scanners and kiosks, contractors on the network, bandwidth drain	Device-based policies, streaming blocked on the floor, strict rules for kiosks	Scanners stay online, bandwidth stays available for operations
Corporate office (100+ staff, Las Colinas or Downtown)	Targeted phishing, remote staff, shadow IT, SIEM requirements	Policies synced with Microsoft Entra ID groups, roaming agents, logs sent to SIEM	Consistent protection everywhere, cleaner audits, faster investigations

Notice the pattern. The technology is the same. What changes is the policy design, and that’s where a good IT partner earns their keep.

Want to know where your business stands? Ighty Support offers a free DNS security check for Dallas-Fort Worth businesses. Call (972) 200-3219 and we’ll show you what your current DNS setup is letting through.

DNS Filtering vs Web Filtering vs Firewall vs Antivirus

DNS filtering blocks a bad connection before it starts; web filtering and firewalls inspect traffic after it starts; antivirus cleans up on the device. You want layers, not a single winner.

Business owners ask me this one all the time: “I already have a firewall and antivirus. Why do I need this?” Here’s the side-by-side:

	DNS filtering	Web filtering (proxy/SWG)	Firewall	Antivirus / EDR
What it checks	The domain being looked up	Full URLs and page content	Ports, IPs, traffic rules	Files and behavior on the device
When it acts	Before the connection is made	After the connection is made	During the connection	After something reaches the device
Devices covered	Every device and app that uses DNS	Usually browsers or routed traffic	Only traffic passing through it	Only devices with the agent
Protects off-network laptops	Yes, with a roaming agent	Sometimes, with an agent	No	Yes
Hardware needed	None	Sometimes	Yes	None
Speed impact	Little or none	Can add latency	Depends on model and inspection	Some CPU use
Best at	Stopping phishing, malware and call-homes early and cheaply	Granular page-level control, deep inspection	Guarding the network edge	Catching what’s already on the machine

The way I explain it to clients: the firewall is the lock on your front door, antivirus is the alarm inside, and DNS filtering is the guard at the end of the driveway who turns away the sketchy van before it even reaches the house.

If you already have a next-gen firewall from Fortinet, Cisco Meraki or SonicWall, DNS filtering doesn’t replace it. It covers the laptops that leave the building and catches bad domains your firewall’s web filter may miss.

DNS Filtering, Compliance and Cyber Insurance

DNS filtering won’t make you compliant by itself, but it gives you a documented control and logs auditors and insurers like to see.

Requirement	Who it hits in DFW	How DNS filtering helps
HIPAA Security Rule	Medical, dental, therapy practices, billing companies	Supports malware protection and audit logging; filtered patient Wi-Fi
PCI-DSS	Retail, restaurants, anyone taking cards	Helps keep POS devices off malicious domains; supports network segmentation efforts
CMMC	Defense contractors and suppliers around Fort Worth and Grand Prairie	Supports network-protection controls; check the current CMMC level requirements with your assessor
Cyber insurance questionnaires	Almost every business applying or renewing	Many carriers now ask about web or DNS filtering alongside MFA and EDR
Acceptable-use / HR policies	Any business with employees	Enforces the policy you already wrote, with reports to back it up

A quick tip: when your cyber insurance renewal lands, don’t guess on the questionnaire. If you check “yes” to DNS or web filtering, make sure it’s actually running on every device, including remote laptops. Insurers can deny claims when the answers don’t match reality.

If compliance is on your plate this year, our guide to the IT compliance audit process in Dallas walks through what auditors really look for.

What to Look for in DNS Security Services in Dallas

Pick a provider on how well it covers your people, not on the longest feature list. When we evaluate DNS security services in Dallas for a client, these are the questions that actually matter:

How fast does the threat data update? Minutes, not days. New phishing domains live for hours.
Does it protect roaming devices? You need an agent for Windows and Mac at minimum, ideally iOS and Android too.
Can policies follow your user groups? Syncing with Microsoft Entra ID (formerly Azure AD) saves a lot of manual work.
Does it handle encrypted DNS? Browsers can use DNS-over-HTTPS to skip your filter. A good setup detects or blocks that.
How good is the reporting? Can you see which device hit a bad domain, and when? Can logs go to a SIEM?
Custom block pages and allow-lists? Staff need a clear message and a fast way to request access to a legitimate site.
SafeSearch and YouTube controls? Handy for schools, churches and customer-facing Wi-Fi.
Who supports it locally? When a vendor portal breaks at 8 a.m., you want someone who can pick up the phone in DFW.

Here’s how some of the names you’ll run into generally compare. Features change often, so confirm current details with any vendor before buying:

Platform	Known for	Often a good fit for
Cisco Umbrella	Large threat intelligence network (Cisco Talos), part of a wider security suite	Businesses already using Cisco or Meraki gear, growing mid-size companies
DNSFilter	AI-based domain categorization, simple dashboard, strong roaming client	SMBs and MSP-managed environments
ScoutDNS	Straightforward setup, content filtering, zero-touch relays	Small businesses, schools, nonprofits, churches
Webroot DNS Protection	Pairs with Webroot endpoint protection	Businesses already on Webroot
Microsoft Defender web protection	Built into Microsoft 365 security licensing	Microsoft-heavy offices wanting one ecosystem

Honestly, for most Dallas small businesses, the platform matters less than how it’s configured and who watches the reports.

How to Set Up DNS Filtering for Your Business (Step by Step)

A typical small-office rollout takes hours, not weeks, if it’s planned properly. Here’s the order we follow:

Audit your current DNS. Check the router, firewall, DHCP server, Wi-Fi controllers and any servers. Note every place DNS is set.
Pick a provider and build policies. Turn on the security categories (malware, phishing, command-and-control, newly registered domains) for everyone. Add content rules by group only where you need them.
Point the network at the filtered resolvers. Update the firewall or router and DHCP so every device on the office network uses the filtered DNS.
Deploy the roaming agent. Push it to laptops and, where supported, phones through your device management tool (Microsoft Intune, for example).
Close the bypasses. Block outbound DNS to anything except your approved resolvers, and handle DNS-over-HTTPS in browsers.
Test before you announce. Use the provider’s test domains to confirm blocking works on and off the network. Customize the block page with your logo and a contact.
Tell your team. A two-line email explaining the block page and how to request access prevents a flood of “the internet is broken” calls.
Review reports weekly for the first month. Fix false positives fast, then move to a monthly review.

Common DNS Filtering Mistakes to Avoid

We’ve cleaned up plenty of half-finished setups around DFW. These are the ones we see most:

Filtering the office but not the laptops. Remote devices are where much of the risk lives now.
Leaving bypasses open. Hard-coded DNS on a device or browser-level encrypted DNS quietly skips the filter.
Over-blocking on day one. Block too much and staff get frustrated, then start finding workarounds.
No allow-list process. People need a quick, clear way to request a legitimate site.
Nobody reads the logs. A device repeatedly hitting a command-and-control domain is an infected device. Someone has to notice.
Treating it as the whole security plan. DNS filtering works best alongside MFA, EDR, email security, patching and staff training. Our guide to ransomware protection in Dallas shows how the layers fit.

How Much Does DNS Filtering Cost for a Dallas Business?

DNS filtering is one of the lowest-cost security layers you can buy, but the real price depends on how many people and devices you protect and how much management you want. I won’t throw out a fixed number here, because two businesses with the same headcount can need very different setups.

What I can do is show you how it’s usually priced and what moves the number.

Common Pricing Models

Pricing model	How it works	Usually suits
Per user, per month	One price per employee, covering all their devices	Offices where each person has a laptop and phone
Per device / per agent	Pay for each protected device	Warehouses, clinics and retail with shared kiosks or scanners
Per network or site	Flat price per office or Wi-Fi network	Guest Wi-Fi, churches, small single-site offices
Bundled in managed IT	Included or added to a monthly managed IT or security plan	Businesses that want it set up, monitored and tuned for them
Free / consumer DNS	Basic public filtering resolvers with no business policies or reporting	Home use; generally not enough for a business

What Drives Your Cost Up or Down

Factor	Lower cost	Higher cost
Number of users and devices	A 10-person office	A 200-person office with shared devices
Locations	One office	Several DFW sites plus remote staff
Remote protection	Office network only	Roaming agents on every laptop and phone
Policy complexity	One company-wide policy	Different rules per department, site and guest network
Reporting and integrations	Basic dashboard	SIEM export, directory sync, compliance reporting
Management	You manage it yourself	Fully managed, with someone reviewing alerts and tuning rules

How to Think About the Value

Compare the cost to one bad day. A single ransomware incident can mean days of downtime, data recovery, legal questions and lost trust. A single phishing click can lead to a fraudulent wire. Against that, DNS filtering is usually a small line item.

The smartest move for most Dallas businesses isn’t buying the cheapest license. It’s getting it deployed properly, with no bypasses and someone actually watching the reports.

Get a clear number for your business. Ighty Support will review your current network, devices and remote setup, then give you a straight recommendation with pricing that fits your size. Call (972) 200-3219 or request a free IT assessment.

How Ighty Support Sets Up DNS Filtering Across DFW

We deploy, tune and monitor DNS filtering as part of a layered security plan, with local engineers who can be on-site when you need them.

Ighty Support has been working with Dallas-Fort Worth businesses since 2011, from our offices in Carrollton and Downtown Dallas. When we roll out DNS threat protection for a client, it looks like this:

Assessment first. We map how DNS works on your network today, find the bypasses, and check remote devices.
Policies that fit your business. Security rules for everyone, content rules only where they make sense, and separate policies for guest Wi-Fi, kiosks or POS systems.
Rollout with no downtime. Network changes and agent deployment are scheduled so your team keeps working.
Ongoing monitoring. We watch for infected devices, tune false positives and include DNS reports in your regular IT reviews.
Part of the bigger picture. DNS filtering sits alongside EDR, MFA, email security, backups and SIEM alerting in our managed IT services in Dallas.

One example: a small professional-services office we support was dealing with repeated “virus pop-up” calls. After we tightened DNS filtering and closed a browser DNS bypass, those calls dropped off, and the reports flagged one laptop that had been quietly reaching out to a suspicious domain. We cleaned it before it became a real incident.

We support businesses across the Metroplex too, including managed IT support in Plano, managed IT support in Frisco and managed IT support in Fort Worth.

DNS Filtering FAQs

What is DNS filtering in simple terms?

DNS filtering is a security check on every website lookup. When a device asks where a website lives, the filter checks whether that site is dangerous or restricted. If it is, the connection is refused and the user sees a block page instead.

Is DNS filtering the same as web filtering?

No. DNS filtering blocks a domain before any connection happens. Web filtering inspects pages and URLs after the connection starts. DNS filtering is faster and covers every device; web filtering offers more detailed page-level control. Many businesses use both.

Does DNS filtering slow down the internet?

Usually not. Good providers answer from nearby data centers in milliseconds, so most users notice no difference. Some businesses actually see slightly faster browsing compared to their internet provider’s default DNS.

Can DNS filtering stop ransomware?

It can stop many ransomware attacks early by blocking the sites that deliver the malware and the servers it calls home to. It isn’t a complete ransomware defense on its own, so pair it with EDR, backups, MFA and patching.

Does DNS filtering protect remote employees?

Yes, if you install the provider’s roaming agent on their laptops and phones. Without the agent, protection only applies while devices are on the office network.

Can employees get around DNS filtering?

They can try, using custom DNS settings, VPNs or browser encrypted DNS. A proper setup blocks outside DNS at the firewall, manages browser settings and alerts on bypass attempts.

Is DNS filtering enough security on its own?

No. It’s a strong first layer, not a full security program. Combine it with multi-factor authentication, endpoint protection, email security, backups and staff training.

How long does setup take for a small Dallas office?

For a typical small office, the network change and policy setup can be done in a day. Rolling agents out to every laptop and tuning the rules usually takes a week or two of light adjustments.

Does DNS filtering help with HIPAA or PCI compliance?

It helps. It supports malware protection, network controls and audit logging that HIPAA and PCI-DSS programs expect. It won’t make you compliant by itself, but it’s a useful documented control.

How much does DNS filtering cost for a small business?

It depends on users, devices, locations, remote protection and whether it’s managed for you. It’s usually one of the most affordable security layers. The best way to get an accurate number is a quick assessment of your setup.

The Bottom Line

DNS filtering is the cheapest, fastest way to stop a bad click from turning into a bad week. It blocks dangerous sites before they load, protects every device on and off your network, and gives you visibility you probably don’t have today.

It won’t replace your firewall, antivirus or common sense. But for most Dallas businesses, it’s one of the highest-value security upgrades you can make this year.

If you’re weighing DNS filtering in Dallas and want someone to look at your actual setup, not a sales script, we’re happy to help.

Book your free DNS security assessment. Call Ighty Support at (972) 200-3219 or schedule a free IT assessment. A local DFW engineer will review your network, remote devices and current DNS, then give you clear next steps.