When Suppliers Become Pathways
Traditional perimeter controls and binary access decisions were not designed for modern OT supply-chain risk. Join Barrier Networks and Cyolo for a practical session on moving vendor remote access from broad network reach to least-privilege, identity-based connectivity — reducing the blast radius without slowing the work that keeps production moving.
88%
of surveyed manufacturers permit remote third-party access to OT environments.
Takepoint Research + Cyolo, 202560%
allow remote third-party access for more than 100 external parties.
Takepoint Research + Cyolo, 202566%
said user-friendly access solutions improve productivity.
Surveyed manufacturing practitioners, 2025Why this matters now
The supplier may be trusted. The pathway still needs control.
OT teams depend on OEMs, technicians and specialist vendors. The risk appears when legitimate access is broader, longer-lived or less observable than the job requires.
Network access is too broad
Legacy remote-access approaches can grant a route into the network when a supplier only needs one application, controller or engineering workstation.
Visibility drops after login
Authentication is only the start. Without post-access controls, teams can struggle to see, limit or stop what happens inside a live vendor session.
Supply-chain risk cascades
Your vendor has vendors too. A compromise elsewhere in the chain can become your problem if the resulting connection can reach too much.
OT cannot simply stop for security
Maintenance, diagnostics and emergency support still have to happen. The goal is stronger control without adding friction that drives workarounds or delays production.
What you will learn
A practical framework for shrinking the blast radius.
Move from “can this person enter the network?” to “who are they, what exact asset do they need, for how long, and what are they allowed to do once connected?”
Verify identity and context
Base access on the user, device and policy context — not simply an IP address, location or possession of a VPN connection.
Grant only the required asset
Replace broad network reach with application- or asset-level connectivity so a maintenance task does not create a route to unrelated OT systems.
Make privileged access temporary
Use approvals and just-in-time windows so access exists when the work is happening — not days, weeks or months beyond the requirement.
Keep control after connection
Record, supervise and, where needed, restrict session actions. The aim is visibility that helps security teams protect operations without taking control away from plant teams.
Why attend
Make third-party access safer — without making it harder to work.
The session connects security controls to the operational outcomes OT teams actually care about.
Limit what a compromised vendor account can reach.
Understand how identity-based, least-privilege connectivity reduces unnecessary network access and constrains the potential blast radius.
Know what is happening after access is granted.
See where session recording, supervision, action controls and time-bound access fit into a practical OT remote-access strategy.
Keep specialists moving when production needs them.
Explore agentless and browser-based access patterns that can reduce onboarding friction, especially during urgent maintenance and support.
Who should be there
For teams responsible for secure access to operational environments.
Especially useful if vendor connectivity is essential to uptime, but current controls still depend on network-level trust.
Inside the session
From pathway to policy.
Why perimeter thinking breaks down in OT vendor access
Where traditional network-based controls create unnecessary reach and why “trusted supplier” does not equal “trusted connection.”
How supply-chain exposure becomes blast-radius exposure
Connect third- and fourth-party risk to the privileges available inside your own environment.
The least-privilege connectivity framework
Identity, asset-level access, approvals, just-in-time windows and controls that remain active after the session begins.
Designing for operations, not around them
How a secure remote-access approach can support legacy OT, emergency maintenance and third-party productivity without returning to broad network access.
Secure your place
Don't let trusted access become an open pathway.
Join Barrier Networks and Cyolo to see how OT teams can move from broad vendor network access to identity-based, least-privilege connectivity with stronger visibility and control.