secure64.com

Secure64 is a DNS and DDI (DNS, DHCP, and IP Address Management) software company that sells protective DNS and DNS security products, including LineGuard, DNS Guard, DNS Cache, DNS Authority, DNS Signer, DNS Manager, and DNS Proxy. It is aimed at organizations that want to block cyberthreats at the DNS layer rather than only at the endpoint or network edge. According to its site, it has 20 years of DNS experience, supports more than 1.5 billion users globally, and has achieved Protective DNS status as recognized by the U.S. Government.

What Secure64 does

Secure64 positions itself around three outcomes: protecting users, protecting data, and protecting reputation. The mechanism behind all three is the same — inspecting DNS queries in real time and stopping malicious activity before it reaches a user, device, or system.

The company describes DNS as the backbone of the internet that "wasn't built for security." Protective DNS (PDNS) fills that gap by analyzing domain queries as they happen, blocking access to harmful domains, and catching mistyped URLs that could lead to phishing or malware. Secure64 states that its Guard solutions protect billions of users, devices, and systems daily, including computers, servers, and IoT infrastructure, whether deployed in the cloud or on-premises.

Product lineup

Secure64 organizes its products into two broad groups: threat protection and core DNS/DDI infrastructure.

Solutions and use cases

Beyond individual products, Secure64 frames its offerings around deployment and migration problems that DNS teams commonly face:

• Building a secure DNS — hardening the DNS layer as part of an overall security posture
• DDI solutions — consolidating DNS, DHCP, and IPAM
• Security services through the DNS — using DNS as a security control point
• Virtualizing the DNS — moving DNS onto virtual infrastructure
• Migrating to ENUM — telephone number mapping in DNS
• Deploying DNSSEC — signing and validating DNS responses
• Defending against DDoS attacks — protecting DNS availability under attack
• Transitioning to IPv6 — supporting IPv6 resolution and addressing

Who it is for

Secure64's stated customers are organizations that need DNS to double as a security control — particularly those with large user bases, regulated environments, or government requirements. The site notes that its Protective DNS status is recognized by the U.S. Government, and that the U.S. CISA and NSA maintain a list of pDNS vendors. That makes it relevant to public-sector and critical-infrastructure buyers evaluating protective DNS options, as well as enterprises that want threat blocking to happen before traffic reaches users.

The company also emphasizes "predictable pricing" and says its engineering team builds solutions that are "one-size-fits-you" rather than one-size-fits-all — a positioning point for buyers who expect custom deployment scoping rather than a single flat SKU.

How to evaluate it

If you are considering Secure64, the site provides several resources worth reviewing before a decision: case studies, information documents, white papers, datasheets, and videos, plus a "Try Secure64" entry point and an "Under Attack?" contact path for active incidents. Because pricing is not published on the pages reviewed here, treat cost as something to confirm directly with the company rather than assuming a free or fixed tier.

Protective DNS (PDNS) is a security layer that inspects DNS queries in real time and blocks requests to malicious or harmful domains before a connection is ever made. Secure64 implements it through its Guard product line, which can be deployed in the cloud or on-premises and is recognized by the U.S. Government as a Protective DNS provider. This matters if you want to stop phishing, malware, and typo-squatting at the network's first lookup step rather than relying only on endpoint or perimeter tools.

How Protective DNS works

Every time a user, device, or application reaches a website or service, it first resolves a domain name to an IP address through DNS. That query is a natural checkpoint: if the domain is known to be malicious, the query can be answered with a block instead of a valid address.

Secure64 describes PDNS as analyzing domain queries in real time to detect and stop malicious activity. In practice that means:

• Blocking harmful domains before the user's device connects to them.
• Catching mistyped URLs that could otherwise lead to lookalike or fraudulent sites.
• Protecting users, devices, and systems across an organization, including computers, servers, and IoT infrastructure.

Because the block happens at resolution time, the threat never reaches the user — the request simply fails or is redirected according to policy.

How Secure64 implements Protective DNS

Secure64 positions itself as a DDI (DNS, DHCP, and IP Address Management) solutions provider with 20 years of DNS experience, and states it already supports more than 1.5 billion users globally. Its Protective DNS capability is delivered through its Guard solutions, which the company says safeguard billions of users, devices, and systems daily.

Two implementation choices are stated on the site:

Secure64 also states it has officially achieved Protective DNS status as recognized by the U.S. Government, and that the U.S. CISA and NSA maintain a list of pDNS vendors. If government recognition is a requirement in your evaluation, that list is the authoritative place to confirm current status.

Where Secure64 fits in a broader DNS stack

Protective DNS is one function among several in Secure64's catalog. The site lists related products including:

• LineGuard — cyberthreat protection and content filtering
• LineGuard Edge
• Vizion
• DNS Guard
• DNS Cache, DNS Authority, DNS Signer, DNS Manager, DNS Proxy

This matters because PDNS is usually deployed alongside authoritative DNS, caching, and DNSSEC signing rather than as a standalone tool. If you already run DNS infrastructure, the relevant question is whether you want filtering integrated with your existing resolution path or added as a separate layer.

When Protective DNS is the right control

PDNS is a good fit when:

• You want to block threats before they reach endpoints, which helps with devices you can't fully manage (IoT, guest devices, unmanaged laptops).
• You need coverage for users who click mistyped or lookalike URLs.
• You want a control that works regardless of whether the traffic is encrypted, since the block happens at name resolution.

It is less suited as a sole defense: PDNS filters based on domain reputation and policy, so it complements — rather than replaces — endpoint protection, email filtering, and network monitoring.

Practical next steps

1. Confirm whether your requirement is cloud, on-premises, or hybrid — Secure64 states both cloud and on-premises options.
2. Check the CISA/NSA pDNS vendor list if government recognition is part of your criteria.
3. Review Secure64's own resources — the site offers case studies, white papers, datasheets, and videos — to see deployment patterns that match your environment.
4. If you are evaluating under active threat, the site includes an "Under Attack?" entry point and a "Try Secure64" option for hands-on evaluation.

Pricing is described on the site as "predictable," but no specific figures or plan details are published in the material reviewed here, so treat cost as something to confirm directly with Secure64.

Secure64's product line splits into two groups: protective DNS and filtering (LineGuard, LineGuard Edge, Vizion, DNS Guard) and core DDI/DNS infrastructure (DNS Cache, DNS Authority, DNS Signer, DNS Manager, DNS Proxy). If your goal is to block malicious domains before users reach them, you want the first group. If your goal is to run, sign, or manage authoritative and recursive DNS yourself, you want the second. Many organizations end up using both, since the Guard products sit in front of the same DNS infrastructure the other products provide.

The company describes itself as a DDI (DNS, DHCP, IP address management) solutions expert with 20 years of DNS experience, supporting more than 1.5 billion users globally, and states it has achieved Protective DNS status as recognized by the U.S. Government. It also says deployments can be cloud or on-premises. Pricing is described as "predictable," but no specific prices or plan tiers are published on the page reviewed here.

Protective DNS and content filtering products

These products analyze domain queries in real time to detect and stop malicious activity, protect users from mistyped URLs, and block access to harmful domains.

Secure64 states its Guard solutions safeguard billions of users, devices, and systems daily, including computers, servers, and IoT infrastructure. The U.S. CISA and NSA maintain a list of protective DNS (pDNS) vendors, which is the reference point to check when validating whether a given vendor meets government-recognized PDNS criteria.

Choose from this group if: your priority is blocking phishing, malware, and unwanted content before a connection is made, and you want that layer applied to all devices on your network without installing agents on each one.

Core DNS and DDI infrastructure products

These are the building blocks for running DNS itself rather than filtering it.

• DNS Cache — recursive/caching resolver function.
• DNS Authority — authoritative name server function.
• DNS Signer — DNSSEC signing.
• DNS Manager — management layer for DNS operations.
• DNS Proxy — proxying DNS traffic.

Secure64 groups these under solutions such as building a secure DNS, DDI solutions, security services through the DNS, virtualizing the DNS, migrating to ENUM, deploying DNSSEC, defending against DDoS attacks, and transitioning to IPv6.

Choose from this group if: you operate your own DNS, need DNSSEC signing, are migrating to IPv6 or ENUM, or need to harden DNS against DDoS. These are infrastructure decisions driven by your DNS architecture, not by end-user filtering policy.

How to decide

1. Define the job first. Filtering/threat blocking → LineGuard family or DNS Guard. Running or signing DNS → DNS Cache, Authority, Signer, Manager, Proxy.
2. Check deployment constraints. Secure64 states cloud and on-premises are both supported; confirm which applies to the specific product you need.
3. Confirm the compliance angle if it matters. If you need government-recognized protective DNS, verify current status against the CISA/NSA pDNS vendor list rather than relying on any single vendor page.
4. Ask about pricing directly. The site references predictable pricing but publishes no rates, so cost comparison requires contacting Secure64 or a partner.

Common sticking points

• Overlap between LineGuard and DNS Guard. Both address threat protection; the distinction is in scope (content filtering vs. protective DNS blocking). Clarify with Secure64 which one matches your policy requirements before assuming they're interchangeable.
• PDNS is not a substitute for endpoint security. Protective DNS blocks resolution of malicious domains; it does not inspect files or stop threats that never touch DNS.
• "Recognized by the U.S. Government" needs a date check. Vendor recognition status can change, so verify against the current CISA/NSA list.

For a side-by-side shortlist, start with DNS Guard if you only need threat blocking, LineGuard if you also need content filtering, and the DNS Cache/Authority/Signer/Manager/Proxy set if your requirement is operating DNS infrastructure itself.

Secure64 treats DDI — DNS, DHCP, and IP Address Management — as a security control point rather than just network plumbing. Its approach is to run DNS on hardened, purpose-built software and layer protective services on top of it, so that the same infrastructure that resolves names also filters malicious domains, absorbs attack traffic, and enforces trust in DNS answers. This fits organizations that want DNS-layer threat blocking and DDI consolidation from a single vendor, particularly those with large user bases or government-grade requirements. It is less relevant if you only need a lightweight internal resolver or already run DDI entirely through a cloud provider's native stack.

The DDI foundation

DDI covers three related functions:

• DNS — resolving domain names to IP addresses and publishing your own zones.
• DHCP — assigning IP addresses and network configuration to devices.
• IPAM — tracking which addresses exist, who holds them, and how they are allocated.

Secure64's product line maps onto this stack: DNS Cache, DNS Authority, DNS Signer, DNS Manager, and DNS Proxy cover resolution, authoritative serving, DNSSEC signing, management, and proxying. LineGuard, LineGuard Edge, and Vizion sit above that as cyberthreat protection and content filtering. The company states it has 20 years of DNS experience and supports more than 1.5 billion users globally.

Security services delivered through DNS

The core idea is that DNS sees every outbound connection attempt before it happens, which makes it a natural enforcement point. Secure64 describes Protective DNS (PDNS) as analyzing domain queries in real time to detect and stop malicious activity — blocking access to harmful domains and catching mistyped URLs before a user reaches them.

Secure64 states it has achieved Protective DNS status as recognized by the U.S. Government, and notes that CISA and the NSA maintain a list of pDNS vendors. Its Guard solutions are offered in cloud or on-premises deployments and are described as protecting users, devices, and systems including computers, servers, and IoT infrastructure.

Solution areas

The site groups its work into named solution tracks:

How to evaluate the fit

1. Confirm the threat model. If your main concern is users reaching malicious or unwanted domains, the Protective DNS and LineGuard layer is the relevant starting point. If your concern is DNS availability under attack, look at the DDoS and authority/cache products.
2. Decide deployment model. Secure64 offers cloud and on-premises options for its Guard solutions. On-premises suits environments with data-residency or air-gap requirements; cloud suits distributed workforces.
3. Check the DDI scope you actually need. DNS-only, or DNS plus DHCP and IPAM? The product list separates these, so map your current tooling before assuming a full replacement.
4. Verify compliance expectations. If you fall under U.S. government protective DNS guidance, the CISA/NSA pDNS vendor list is the reference point Secure64 itself cites.
5. Ask about pricing directly. The site mentions "predictable pricing" but publishes no rate card, tiers, or free-tier terms. Treat cost as a sales conversation, not an assumption.

Common sticking points

• Protective DNS is not a firewall. It blocks based on domain reputation and query analysis; it does not inspect payloads or replace endpoint protection.
• DNSSEC is operational work, not a checkbox. Signing zones introduces key rollover and validation-failure handling that need an owner.
• Virtualizing DNS changes failure modes. Virtual appliances inherit hypervisor and network dependencies that bare-metal DNS did not have.
• IPv6 transition affects IPAM first. Address planning and DHCPv6 scope design usually surface problems before DNS does.

For a concrete starting task: inventory your current resolvers, authoritative servers, DHCP scopes, and IPAM records; identify which of the eight solution areas above each one touches; then request a trial through the site's "Try Secure64" entry point with that inventory in hand.

Secure64 offers several direct paths for contact and support: a Contact page for general and sales inquiries, a Support section with an overview for existing customers, a Customer Login for account-specific resources, a Try Secure64 option for evaluation, and a dedicated Under Attack? entry for urgent security situations. The right path depends on whether you're an existing customer, evaluating the product, or responding to an active incident.

Contacting Secure64

The website's main navigation includes a Contact link alongside Contact Us in the footer area. This is the general entry point for reaching the company — whether for sales questions about the DDI and DNS security product lines, partnership inquiries, or general information.

Secure64 also lists a Partners page, which is relevant if you're looking to work through a reseller or technology partner rather than directly.

Getting Support

The Support section is accessible from the main navigation and provides a Support Overview. This is the starting point for existing customers who need help with deployed products such as DNS Guard, DNS Cache, DNS Authority, DNS Signer, DNS Manager, DNS Proxy, LineGuard, LineGuard Edge, or Vizion.

For account-specific resources — documentation, case studies, white papers, datasheets, and videos — customers can use the Customer Login link at the top of the site. Note that the site does not state whether login is required for all resources or only some; the Resources section (Case Studies, Information Documents, White Papers, Datasheets, Videos) appears in the main navigation, so some materials may be reachable without logging in.

If You're Under Attack

Secure64 provides a dedicated Under Attack? link in the site navigation. This is the appropriate path if you're dealing with an active DNS-based threat such as a DDoS attack or malicious domain activity. Given that Secure64 positions itself around Protective DNS — analyzing domain queries in real time to detect and stop malicious activity — this entry point connects you to the team best positioned to help during an incident.

Evaluating Secure64

If you're not yet a customer, the Try Secure64 option lets you evaluate the products before committing. Secure64 describes its approach as "one-size-fits-you" rather than one-size-fits-all, with predictable pricing, so an evaluation is a reasonable step before a purchasing conversation.

Which Path Should You Use?

What Secure64 Does (Context for Your Inquiry)

Secure64 is a DDI (DNS, DHCP, IP Address Management) solutions provider with 20 years of DNS experience, supporting more than 1.5 billion users globally. Its product lines include:

• LineGuard — cyberthreat protection and content filtering
• LineGuard Edge and Vizion
• DNS Guard, DNS Cache, DNS Authority, DNS Signer, DNS Manager, DNS Proxy

The company has achieved Protective DNS status as recognized by the U.S. Government, and its Guard solutions can be deployed in the cloud or on-premises. The U.S. CISA and NSA maintain a list of Protective DNS vendors, which is a useful reference if you're comparing options.

Practical Tips Before You Reach Out

• Have your deployment details ready. Whether cloud or on-premises, and which products you're running, will speed up a support interaction.
• Check the Resources section first. Case studies, white papers, datasheets, and videos may answer technical questions without a support ticket.
• Use "Under Attack?" for incidents, not general inquiries. Routing an active threat through the general contact form may slow your response.
• For pricing, the site mentions "predictable pricing" but does not publish rates or payment details — you'll need to contact Secure64 directly for a quote.