How Knocknoc removes attack surface

 

Just-in-time, IP-address based network allowlisting. 

Simple, very effective and now possible to do at-scale.

Your own infrastructure, fast to deploy without a big project, hosted on-premise – protect internal/external systems at scale.

 

Make your systems invisible

Knocknoc redefines security by dynamically implementing just-in-time network and application allow-listing. It doesn’t just mitigate risks – it makes attack surfaces disappear.

  • Zero day exploitation? Risk removed, or at least greatly reduced.
  • Pre-auth exploitation? No longer possible. Attackers can’t reach your systems pre-auth.
  • Vulnerability mapping? Prevented, your systems go dark.
  • Internal or External? Both. Hide public systems, internal subnets, specific hosts or critical networks.

Take a typical SSH bastion host:

  • Without Knocknoc: SSH is exposed to the entire internet.
  • With Knocknoc: An agent dynamically opens the SSH port only for the authenticated user’s IP address – out of bad. Until then, no port or service is visible.

Network-level exposure is then tied to your IDP – add MFA without changing SSH or interfering with existing, direct network access.

Host based firewall control example

Hide networks, not just hosts, using Knocknoc

Out of band firewall orchestration, removing attack surfaces

Just in time network access

Flat internal network? Drop in protection, fast

Flat networks are a fact of life, network segmentation or micro-segmentation can be a big project and requires end-client installation. If you want to protect certain networks or assets fast, Knocknoc can drop in and control pre-authentication attack surface. Think of it as pico-segmentation.

  • Knocknoc can be deployed in hours – not days, weeks or months
  • No user installation – instant compatibility for unmanaged devices
  • Link to your IDP/SAML, use the built-in authentication with MFA or combine them
  • Contractor and third-party access – short lived account support
Need a control layer?

Knocknoc can provide an on-premise control layer with layer-7 filtering for HTTPs URI-level access control, tied to a Knocknoc login

On premise and internal, external and edge, or in public cloud – decentralised and direct network access, all managed centrally
Screenshot 2025 09 23 at 17.16.41 How Knocknoc Works

Keen to know more?

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