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Network solutions: RADIUS, DNS filtering and secure access

From RADIUS authentication and AAA to DNS filtering, Wi-Fi captive portals and secure-environment proxies — we design, build and operate the network software layer, at serious scale.

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What we do

Network software, engineered and operated

Most software agencies stop at the application layer. We are just as comfortable in the network itself — the authentication, filtering and access-control layer that sits between users and the internet — and we build that layer as bespoke, engineered software.

RADIUS is a core specialism. We design and build RADIUS servers and AAA (authentication, authorisation and accounting) systems for ISPs, Wi-Fi providers and enterprises: subscriber authentication, dynamic policy, usage accounting and integration with billing and directory services. If your network needs RADIUS to behave in a way off-the-shelf servers will not, that is exactly the work we take on.

Around that sits the rest of the access stack. Our ArkDNS platform provides cloud DNS filtering and protection, answering more than a billion requests a day. We build Wi-Fi captive portals that turn guest access into a branded, managed, measurable experience. And for organisations that control connectivity in secure environments, we build proxy solutions providing filtering and analytics on every connection.

Everything is delivered the way software should be — version-controlled, tested, monitored and operated — not as a box of appliances with a support contract.

Capabilities

Capabilities: RADIUS, DNS and access control

  • RADIUS & AAA development

    Bespoke RADIUS servers and integrations — subscriber authentication, authorisation policy and usage accounting, connected to your billing and directory systems.

  • DNS filtering & protection

    Cloud DNS with category filtering, threat blocking and per-network policy — proven on our ArkDNS platform at over a billion requests a day.

  • Wi-Fi captive portals

    Branded guest access journeys with voucher, sponsored and paid tiers, backed by RADIUS authentication and full session accounting.

  • Proxy solutions for secure environments

    Filtering, inspection and analytics on every connection, for organisations where controlled internet access is a hard requirement.

  • Analytics & reporting

    Dashboards and reporting across DNS, RADIUS and proxy traffic — turning raw network data into something operators can act on.

  • Integration & migration

    We connect to what you already run — FreeRADIUS estates, directories, billing platforms — and migrate services without downtime.

Why Silverark

Why Silverark for network solutions

01

Operating at a billion requests a day

ArkDNS, our cloud DNS filtering platform, answers over a billion requests a day. We do not just build network software — we run it in production.

02

RADIUS depth you can borrow

Authentication, authorisation and accounting for real subscriber bases — including the awkward vendor quirks and billing integrations that make RADIUS projects hard.

03

At home in secure environments

We have delivered filtering, proxy and video solutions inside locked-down networks where standard cloud services simply are not permitted.

04

Software engineering, not box-shifting

Everything we deliver is bespoke, version-controlled, tested and monitored software — not an appliance with a support contract attached.

Proof

Related case studies

ArkDNS

Cloud DNS with protection and filtering, answering more than a billion requests a day.

Read the case study

Assist

A bespoke operations application for an industry-leading network solutions provider.

Read the case study

FAQ

Network solutions — common questions

Do you build custom RADIUS servers?
Yes — RADIUS and AAA development is one of our core specialisms. We build bespoke RADIUS solutions when off-the-shelf servers cannot express your authentication, policy or accounting logic, and we extend or integrate existing estates such as FreeRADIUS when they can.
Can RADIUS integrate with our billing or directory systems?
That is usually the point. We connect RADIUS authentication and accounting to billing platforms, LDAP and Active Directory, CRMs and custom subscriber databases — so access control and revenue stay in step.
What does DNS filtering actually give us?
Control and visibility at the network’s front door: blocking malware and phishing domains, enforcing content policy per site or per customer, and producing analytics on what your networks are resolving — all without installing software on user devices.
Can you build a captive portal for our guest Wi-Fi?
Yes. We build branded captive portal journeys — free, voucher, sponsored or paid access — backed by RADIUS for authentication and accounting, with the analytics to show who is using your network and how.
What is a proxy solution for a secure environment?
A controlled path to the internet for settings where open access is not acceptable. Our proxy solutions filter and inspect every connection, apply policy per user or per group, and provide analytics and audit trails for the people responsible.

Have a network problem that needs real engineering?

RADIUS, DNS, captive portals or something stranger — describe the problem, and we will tell you plainly how we would solve it.

Talk to us