The Short Answer
Manufacturers should secure remote vendor access by requiring individually assigned accounts, multi-factor authentication, least-privilege permissions, approval-based access, network segmentation, session logging, and immediate removal of access when it is no longer required.
Vendors should never receive unrestricted, permanent access to an entire manufacturing network simply because they support one machine, application, or production system.
For most small and mid-sized manufacturers, a secure vendor-access program should include:
- A complete inventory of every remote connection
- Named accounts for individual vendor technicians
- Multi-factor authentication
- Access limited to approved systems
- A controlled gateway, jump host, or segmented connection
- Time-limited or approval-based access
- Session logging and security alerts
- Separation between office and production networks
- Documented emergency-access procedures
- Quarterly account and access reviews
Remote-access software provides legitimate operational benefits, but cybercriminals also misuse these tools to obtain broad access to IT, operational technology, and industrial-control environments.
At TR Technologies, we have been serving Chicagoland manufacturers since 2001, helping companies maintain the remote support their production systems require while reducing unnecessary cybersecurity exposure.
Why Manufacturers Need Remote Vendor Access
Manufacturers rely on specialized vendors to support systems that internal employees may not have the training, tools, or authorization to service.
Remote access may be required for:
- CNC machines
- Robotics
- Programmable logic controllers
- Human-machine interfaces
- Industrial-control systems
- ERP platforms
- Production scheduling software
- Quality-management systems
- Labeling systems
- Warehouse equipment
- Security cameras
- Building automation
- Firewalls
- Servers
- Backup platforms
- Engineering software
- Specialized databases
A machine builder may need to diagnose an equipment fault.
An ERP consultant may need to investigate a database problem.
An automation integrator may need to review a PLC configuration.
A managed IT provider may need to respond to a server, firewall, or Microsoft 365 issue.
Remote access can reduce:
- Technician travel
- Equipment downtime
- Diagnostic delays
- Support costs
- Time required to restore production
- Dependence on local specialists
The problem is not remote access itself.
The problem is remote access that is:
- Undocumented
- Overly broad
- Permanently enabled
- Protected only by a password
- Shared among multiple people
- Connected directly to production systems
- Poorly monitored
- Never reviewed
- Left active after a vendor relationship ends
Operational technology is becoming more interconnected to support remote monitoring, analytics, maintenance, and operational efficiency. That connectivity also increases the potential impact of insecure or exposed access paths.
Why Remote Vendor Access Creates Cybersecurity Risk
A remote vendor connection creates a pathway between an outside organization and an internal system.
That pathway may be legitimate, but it can still be compromised.
Potential risks include:
- Stolen vendor credentials
- Compromised vendor laptops
- Malware on vendor systems
- Shared passwords
- Former vendor employees retaining access
- Unpatched remote-access software
- Internet-exposed services
- Misconfigured VPNs
- Excessive permissions
- Limited logging
- Unapproved remote-support tools
- Vendor-owned cellular connections
- Flat networks that permit lateral movement
- Accounts that never expire
- Connections that bypass internal security controls
A trustworthy vendor can still experience a security incident.
For example, an attacker may compromise a vendor technician’s credentials and then use the vendor’s legitimate access method to enter a customer environment.
Remote monitoring and management products are especially attractive to attackers because the tools are designed to provide administrative access and may already be trusted by security software. CISA, the NSA, and the MS-ISAC have warned that legitimate remote-management software can be abused for unauthorized access.
Manufacturers should therefore evaluate every vendor connection based on:
- The identity of the person connecting
- The condition of the connecting device
- The system being accessed
- The privilege required
- The duration of the session
- The operational reason
- The activity performed
- The logs created
- The process for ending access
The ACCESS Framework for Secure Vendor Connectivity
TR Technologies recommends using the ACCESS Framework to organize remote vendor access.
Learn more Learn more in our Network Segmentation for Manufacturers Guide.
A — Account for Every Vendor Connection
C — Confirm Every User’s Identity
C — Constrain Access to Required Systems
E — Enable Controlled and Time-Limited Sessions
S — See and Record Vendor Activity
S — Suspend Access When Work Is Complete
A — Account for Every Vendor Connection
Manufacturers cannot secure remote vendor access until they know which vendors, tools, accounts, and systems are involved.
The first step is creating a complete vendor-access inventory.
What to Document
For every vendor connection, record:
- Vendor company
- Primary vendor contact
- Emergency vendor contact
- Internal business owner
- Systems supported
- Remote-access product
- Connection method
- Vendor usernames
- Administrative privileges
- Business reason for access
- Whether access is attended or unattended
- Whether access is permanent or temporary
- MFA status
- Last connection date
- Contract expiration date
- Account expiration date
- Internal approval process
- Logging capability
- Responsible internal employee
Remote-Access Methods to Inventory
Look for:
- VPN accounts
- Remote Desktop Protocol
- Remote desktop gateways
- TeamViewer
- ScreenConnect
- AnyDesk
- LogMeIn
- Splashtop
- BeyondTrust
- Remote support agents
- Vendor cloud portals
- Machine-specific support applications
- Persistent management agents
- Direct firewall rules
- Web-based administration portals
- Modems
- Vendor-owned cellular connections
- Hardware-level remote management
- Custom industrial support tools
Remote-access tools can create graphical, command-line, tunneled, or hardware-level sessions between systems, so the inventory should extend beyond traditional desktop-sharing software.
Hidden Vendor Access
Remote access may have been installed by:
- Machine builders
- ERP consultants
- Copier companies
- Phone providers
- Security-camera vendors
- HVAC contractors
- Automation integrators
- Software developers
- Former managed service providers
- Temporary project contractors
Some tools may run continuously in the background even though current leadership is unaware of them.
Others may have been installed during a past emergency and never removed.
Questions to Ask
- Which vendors can connect today?
- Which remote-access tools are installed?
- Who approved each connection?
- Which systems can each vendor reach?
- Are any credentials shared?
- Are any connections undocumented?
- Are former vendors still enabled?
- Do any machines use their own Internet connection?
- Are vendor-owned modems or cellular devices present?
- Is access controlled by the manufacturer or by the vendor?
- Who reviews vendor accounts?
- Who can disable access during an incident?
A current view of the OT architecture, including connectivity, dependencies, and third-party access, is essential for managing operational risk. CISA and international partners have emphasized the value of maintaining a definitive view of OT architecture.
C — Confirm Every User’s Identity
Every vendor technician should use an individually assigned account protected by multi-factor authentication.
The manufacturer should be able to identify the actual person who connected.
Avoid:
- Shared vendor accounts
- Generic usernames
- Accounts named “vendor”
- Shared passwords
- Credentials emailed in plain text
- Accounts used by multiple vendor companies
- Passwords that never change
- Direct access without identity verification
Require Named Accounts
A named account improves accountability.
Instead of:
machinevendor
Use an account assigned to a specific technician or identity, such as:
vendor-jane.smith
The exact naming convention may vary, but the manufacturer should be able to connect every login to:
- A specific individual
- A specific vendor
- A defined business purpose
- A responsible internal owner
Require Multi-Factor Authentication
A stolen password should not be enough to access a production-related system.
Where supported, require:
- Phishing-resistant MFA
- Hardware security keys
- Authenticator applications
- Certificate-based authentication
- Other approved strong-authentication methods
CISA recommends phishing-resistant MFA for essential OT remote access and also advises organizations to use strong passwords, least privilege, segmentation, and removal of dormant accounts.
Review the Connecting Device
Identity is only one part of access security.
Where practical, also evaluate:
- Device ownership
- Operating-system support status
- Endpoint protection
- Patch status
- Disk encryption
- Device compliance
- Geographic location
- Source IP address
- Known security risks
A valid username and MFA approval do not automatically prove that the connecting computer is safe.
Manage Vendor Employee Turnover
Vendor accounts may remain active after a technician:
- Leaves the vendor
- Changes departments
- Changes customers
- Loses support responsibility
- Moves to a subcontractor
- No longer requires access
Contracts and operating procedures should require vendors to notify the manufacturer when personnel changes affect access.
Account Lifecycle Checklist
For each vendor account:
- Verify the individual’s identity.
- Confirm the business reason for access.
- Assign the minimum required privileges.
- Enable MFA.
- Set an expiration date.
- Document the account owner.
- Review the account quarterly.
- Disable it promptly when no longer required.
C — Constrain Access to Required Systems
Vendor access should be limited to the minimum systems, applications, network segments, protocols, and privileges required to complete approved work.
This is the principle of least privilege.
A machine vendor that supports one CNC system should not automatically receive access to:
- Accounting
- Payroll
- Microsoft 365
- File servers
- Backup systems
- Other production equipment
- Network administration
- Customer data
- Human resources systems
Poor Vendor-Access Design
A machine vendor connects through a general-purpose VPN.
Once connected, the technician can reach:
- The ERP server
- File storage
- Domain controllers
- Accounting systems
- Backup infrastructure
- Other production systems
- Network equipment
The vendor may never intend to access those resources, but the connection still creates unnecessary exposure.
Better Vendor-Access Design
The same vendor connects through a controlled gateway.
Access is limited to:
- One jump host
- One approved machine
- One production segment
- One application
- A defined set of ports
- An approved maintenance window
Everything else is denied by default.
Technical Controls
Depending on the environment, manufacturers may use:
- Firewall access-control rules
- Separate vendor VPN groups
- Role-based permissions
- Network segmentation
- Jump hosts
- Remote desktop gateways
- Privileged-access workstations
- Application-specific access
- Zero-trust network access
- Allow-listed destinations
- Restricted ports and protocols
- Deny-by-default policies
- Separate administrative accounts
- Privileged-access management
Apply Zero-Trust Principles
Zero trust does not mean that every vendor is considered malicious.
It means access is not automatically trusted merely because:
- The vendor has connected before
- The account exists
- The technician is inside a VPN
- The device appears on an internal network
- The vendor owns the supported equipment
NIST’s zero-trust model states that users and assets should not receive implicit trust solely because of physical location, network location, or ownership. Access should be explicitly authenticated and authorized for the requested resource.
IT and OT Considerations
Production systems often have constraints that do not exist in standard office environments.
These may include:
- Unsupported operating systems
- Vendor-specific software
- Proprietary protocols
- Limited maintenance windows
- Safety requirements
- Equipment certification concerns
- Machine warranty restrictions
- Limited endpoint-security support
- Long equipment lifecycles
Cybersecurity changes should therefore be coordinated with:
- Operations
- Engineering
- Machine builders
- Automation integrators
- Equipment manufacturers
- Safety personnel
- IT providers
Do not install security software, block protocols, or change production connectivity without understanding the operational consequences.
Compensating Safeguards
When a production system cannot support modern security controls, consider:
- Strong segmentation
- Gateway-based access
- Session approval
- Session monitoring
- Restricted source addresses
- Limited access windows
- Isolation when remote support is not required
- Enhanced logging
- Dedicated support workstations
- Replacement planning
Legacy OT protocols may lack strong authentication and protection against impersonation or unauthorized changes, making compensating controls particularly important.
E — Enable Controlled and Time-Limited Sessions
Vendor access should be enabled only when needed, approved by an authorized employee, and disabled or expired after the approved work is complete.
Four Common Access Models
Always-On Access
The vendor can connect at any time without internal approval.
Advantages:
- Fast response
- Low administrative effort
Risks:
- Long exposure window
- Limited internal awareness
- Increased opportunity for account misuse
- Difficult offboarding
- Greater dependence on vendor security
Scheduled Access
The vendor can connect only during approved maintenance periods.
Advantages:
- Reduced access window
- Easier coordination with operations
Risks:
- Access may remain active longer than required
- Unused accounts may still accumulate
Approval-Based Access
An authorized employee approves each connection.
Advantages:
- Better visibility
- Clearer accountability
- Stronger connection to a support ticket or work order
Risks:
- Requires reliable internal availability
- Emergency procedures must be defined
Just-in-Time Access
Access is created, activated, or elevated only for a defined task and automatically expires.
Advantages:
- Shortest practical exposure
- Strong accountability
- Reduced dormant access
Risks:
- May require more advanced tools and planning
- Must account for after-hours production emergencies
Recommended Approval Workflow
- The vendor or internal employee opens a support request.
- The internal system owner verifies the business need.
- IT confirms the approved vendor and technician.
- The required account and target system are identified.
- Access is enabled for a defined time.
- The technician completes the approved work.
- Activity and changes are documented.
- Access is disabled or expires automatically.
- The internal owner confirms the outcome.
- Logs are retained according to policy.
Tie Every Session to a Business Record
Each session should be associated with:
- A support ticket
- A work order
- A change request
- A maintenance record
- An incident number
- An internal approver
This helps answer:
- Why did the vendor connect?
- Who approved it?
- What did the vendor change?
- Did the change resolve the problem?
- Was access closed afterward?
Emergency Access
Manufacturers should define a separate procedure for emergencies.
Document:
- Who may approve emergency access
- Which vendor may connect
- How identity will be verified
- Which systems may be accessed
- How long access may remain active
- Who monitors the session
- Who must be notified
- How the work will be reviewed afterward
Manufacturing Example
A CNC machine stops during the second shift.
Instead of leaving permanent vendor access enabled:
- The production supervisor contacts the approved support number.
- The vendor identifies the assigned technician.
- The technician’s identity is verified.
- A two-hour access window is approved.
- Access is opened through a controlled gateway.
- The vendor can reach only the affected machine.
- The support session is logged.
- Changes are recorded in the work order.
- Access expires automatically.
- Operations verifies that the machine is functioning.
The manufacturer receives fast remote support without leaving a permanent path open to the production environment.
S — See and Record Vendor Activity
Manufacturers should be able to determine:
- Who connected
- When the connection began
- When the connection ended
- Which system was accessed
- Which authentication method was used
- Which actions were performed
- Which changes were made
- Whether files were transferred
- Who approved the session
Recommended Logging
Capture:
- Vendor identity
- Source IP address
- Device information where available
- Login time
- Disconnect time
- Authentication result
- MFA result
- Target system
- Target application
- Privilege level
- Failed login attempts
- Configuration changes
- File transfers
- Commands or administrative activity where supported
- Internal approver
- Ticket or work-order number
Generate Alerts
Consider alerts for:
- Connections outside approved hours
- Failed MFA attempts
- Connections from unexpected countries
- Access from new devices
- Attempts to reach unauthorized systems
- Multiple failed logins
- Newly installed remote-access software
- Disabled endpoint protection
- Large file transfers
- Vendor access without an open ticket
- Privilege escalation
- Use of dormant accounts
- Direct Internet access to OT assets
Session Recording
Session recording may be appropriate for:
- Privileged access
- Firewall changes
- Server administration
- Critical production-system access
- Regulatory or customer requirements
- High-risk troubleshooting
- Sensitive configuration changes
Before implementing session recording, review:
- Legal requirements
- Contractual terms
- Employee and vendor notification
- Privacy considerations
- Storage requirements
- Retention periods
- Access to recordings
Assign Responsibility
Logs provide limited value when nobody reviews them.
Assign responsibility for:
- Reviewing alerts
- Investigating anomalies
- Retaining records
- Escalating suspicious activity
- Reporting incidents
- Validating approved changes
- Coordinating with vendors
CISA’s guidance on remote-access software recommends organizations understand legitimate remote-access use, monitor for misuse, and establish controls that help detect unauthorized activity.
S — Suspend Access When Work Is Complete
Vendor access should be disabled when the approved task, support contract, or business relationship ends.
Disable Access When
- The support session ends
- The maintenance window closes
- A project is completed
- A contract expires
- A vendor is replaced
- A technician leaves the vendor
- A machine is retired
- Software is replaced
- An emergency has been resolved
- A security concern is identified
- An account has been inactive
- Access is no longer justified
Remove More Than the Account
Vendor offboarding may require:
- Disabling usernames
- Removing MFA registrations
- Removing software agents
- Closing firewall rules
- Deleting VPN profiles
- Rotating shared credentials
- Recovering hardware
- Removing certificates
- Deactivating API keys
- Reviewing service accounts
- Updating network diagrams
- Updating vendor documentation
Quarterly Vendor-Access Review
At least quarterly, review:
- Active vendor accounts
- Assigned account owners
- Last login dates
- MFA enrollment
- Accessible systems
- Administrative privileges
- Account expiration dates
- Installed remote-access software
- Contract status
- Vendor personnel changes
- Unused firewall rules
- Dormant VPN profiles
- Vendor-owned connectivity
- Emergency accounts
Higher-risk access may require more frequent review.
Annual Vendor Security Review
Evaluate:
- Vendor security practices
- Breach-notification obligations
- Cyber insurance
- Subcontractor use
- Data-handling practices
- Remote-access technology
- Personnel offboarding
- Vulnerability-management practices
- Incident-response contacts
- Contractual security requirements
- Support escalation procedures
Which Remote-Access Technology Should Manufacturers Use?
There is no single technology that is right for every manufacturer.
The correct approach depends on:
- System type
- Vendor requirements
- Operational risk
- Existing infrastructure
- Logging requirements
- Production hours
- Internal expertise
- Budget
- Legacy-system limitations
- Safety requirements
Virtual Private Network
A VPN can be appropriate when:
- MFA is required.
- Named accounts are used.
- Access is segmented.
- Firewall rules restrict destinations.
- Logs are monitored.
- Dormant accounts are disabled.
- The VPN does not expose the entire internal network.
A VPN encrypts connectivity, but it does not automatically provide least privilege, identity governance, device security, session approval, or application-level restriction.
Traditional VPNs can create significant business risk when misconfigured or treated as broad, trusted network access.
Zero-Trust Network Access
Zero-trust network access may be appropriate when:
- Access should be application-specific.
- Users should not receive broad network connectivity.
- Identity and device information should influence access.
- Access must be centrally controlled.
- Continuous authorization is desired.
Zero trust is a strategy rather than one product. NIST has published multiple example architectures showing that organizations can implement zero-trust principles using different combinations of commercial technologies.
Remote Desktop Gateway or Jump Host
A gateway or jump host may be appropriate when:
- Vendors should not connect directly to production equipment.
- Access must pass through a controlled intermediary.
- Session monitoring is needed.
- Production systems cannot support modern security controls.
- File transfers need to be restricted.
The jump host itself must be:
- Patched
- Monitored
- Protected by MFA
- Restricted
- Backed up where appropriate
- Reviewed for suspicious activity
Privileged-Access Management
Privileged-access management may be appropriate when:
- Vendors require administrative rights.
- Credentials should be stored in a secure vault.
- Passwords should rotate after use.
- Sessions require approval.
- Privileged sessions should be recorded.
- Organizations need detailed audit records.
Vendor-Specific Cloud Portal
A proprietary vendor portal may be required when:
- The machine manufacturer controls the support platform.
- The system uses specialized protocols.
- The vendor requires its own service architecture.
Before approving the portal, review:
- MFA capability
- Named-account support
- Logging
- Data handling
- Encryption
- Vendor incident history
- Subcontractor access
- Account offboarding
- Connection restrictions
- Security-update practices
Cellular or Out-of-Band Connection
Some production equipment includes:
- Cellular modems
- Vendor routers
- Embedded gateways
- Independent Internet connections
- Dial-up or out-of-band support paths
These connections may bypass:
- The corporate firewall
- Network monitoring
- Access-control policies
- Standard logging
- Incident-containment procedures
They should be:
- Inventoried
- Approved
- Documented
- Secured
- Monitored where possible
- Disabled when unnecessary
- Included in incident-response planning
CISA advises organizations to remove OT assets from direct public Internet exposure where possible and to use strongly authenticated, restricted remote-access methods when remote access is necessary.
Remote Vendor Access Security Checklist
Use this checklist to review the current environment.
Identity
- Every technician has a named account.
- Shared credentials have been eliminated.
- MFA is enabled.
- Technician identity is verified.
- Accounts have expiration dates.
- Vendor personnel changes trigger access review.
Authorization
- Access follows least privilege.
- Vendors reach only approved systems.
- Administrative rights are limited.
- Standard and privileged accounts are separated.
- Access is reviewed regularly.
Connectivity
- Remote access uses an approved gateway or platform.
- Production systems are not directly exposed to the Internet.
- Office and production networks are segmented.
- Firewall rules are restricted.
- Unapproved remote-access tools are removed.
- Vendor-owned cellular connections are documented.
Session Control
- Internal approval is required.
- Sessions have defined start and end times.
- A ticket or work order is required.
- Access expires automatically where possible.
- Emergency-access procedures are documented.
Monitoring
- Connections are logged.
- Failed logins generate alerts.
- After-hours sessions are monitored.
- File transfers are reviewed where appropriate.
- Privileged activity is captured.
- Someone is responsible for reviewing alerts.
Offboarding
- Accounts are disabled promptly.
- Remote-access agents are removed.
- Firewall rules are closed.
- Credentials are rotated.
- Certificates and keys are revoked.
- Documentation is updated.
Common Remote Vendor Access Mistakes
Sharing One Vendor Account
A shared account prevents the manufacturer from determining which technician performed an action.
Leaving Access Enabled Permanently
Permanent access increases the period during which a compromised account, device, or tool could be misused.
Trusting the Vendor Without Verification
A reputable vendor can still experience:
- Credential theft
- Malware
- Employee turnover
- Software vulnerabilities
- Subcontractor risk
- Internal security failures
Allowing Access to the Entire Network
A vendor should receive access to the system it supports—not a permanent key to the entire environment.
Failing to Require MFA
A stolen password should not provide remote access to production-related systems.
Using Unsupported Remote-Access Software
Old or unsupported software may contain known vulnerabilities or lack modern authentication and logging features.
Installing Multiple Remote-Access Tools
Multiple remote-access products increase:
- Attack surface
- Licensing costs
- Monitoring complexity
- Support complexity
- Documentation gaps
- Offboarding difficulty
Ignoring Cellular Connections
Vendor-owned cellular connections may bypass the manufacturer’s normal firewall and monitoring controls.
Collecting Logs Without Reviewing Them
Security logs do not provide meaningful protection unless someone reviews alerts and investigates unusual activity.
Failing to Remove Former Vendors
Inactive vendor relationships often leave behind:
- Accounts
- Software
- Certificates
- Firewall rules
- VPN profiles
- Shared credentials
- Cellular equipment
How Does Remote Vendor Access Relate to Cyber Insurance?
Cyber insurance applications commonly ask about controls involving:
- MFA
- Remote access
- Privileged accounts
- Endpoint protection
- Network segmentation
- Backups
- Logging
- Incident response
- Third-party risk
Requirements vary by insurer, policy, industry, company size, and risk profile.
Manufacturers should not assume that every carrier uses the same questions or standards.
Evidence to Retain
Keep records such as:
- MFA reports
- Vendor-access inventory
- Account-review reports
- VPN configuration summaries
- Firewall rules
- Session logs
- Remote-access policies
- Vendor contracts
- Offboarding records
- Incident-response procedures
- Security assessment reports
Answer Insurance Applications Accurately
Cyber insurance applications should reflect the actual environment.
For example, do not state that all remote access uses MFA when:
- One vendor portal lacks MFA
- A legacy VPN account remains active
- A machine vendor uses a direct modem
- An emergency account bypasses standard controls
How Does Remote Vendor Access Fit NIST CSF 2.0?
Remote vendor access affects every NIST CSF 2.0 function.
| NIST CSF 2.0 Function | Remote Vendor Access Application |
|---|---|
| Govern | Define policies, responsibilities, contracts, risk tolerance, and vendor requirements. |
| Identify | Inventory vendors, accounts, remote-access tools, systems, and dependencies. |
| Protect | Require MFA, least privilege, segmentation, approved gateways, and secure configurations. |
| Detect | Monitor logins, sessions, unauthorized tools, failed authentication, and unusual activity. |
| Respond | Disable access, investigate suspicious sessions, preserve evidence, and notify appropriate parties. |
| Recover | Restore affected systems, validate configurations, resume operations, and improve controls. |
A secure vendor-access program should not be treated as a standalone technical project.
It should be part of the manufacturer’s overall cybersecurity governance, risk-management, and operational-resilience strategy.
Related Reading: What Is NIST CSF 2.0 and Why Does It Matter for Manufacturers?
Questions to Ask Machine and Software Vendors
Before approving remote access, ask:
- Why is remote access required?
- Which systems must you reach?
- Which ports and protocols are required?
- Is permanent access necessary?
- Can access be enabled only when needed?
- Does your platform support MFA?
- Can every technician use a named account?
- Are sessions logged?
- Can sessions be recorded?
- Do you use subcontractors?
- How are former employees removed?
- How quickly do you patch the remote-access platform?
- How will you notify us of a security incident?
- Can access pass through our approved gateway?
- Can the connection be limited to one device?
- Who owns the remote-access hardware?
- Does the equipment contain a cellular modem?
- What happens if remote access is disabled?
- Is on-site support available as a backup?
- What security controls are included in the product by default?
Security should also be considered when purchasing new industrial products. CISA’s secure-by-demand guidance encourages OT owners and operators to evaluate security capabilities during procurement rather than attempting to add every safeguard after deployment.
Questions to Ask an IT Provider
- Will you inventory all vendor-access paths?
- Can you identify unauthorized remote-access tools?
- Will you require MFA?
- Can you implement approval-based access?
- Can you restrict vendors to specific systems?
- Will you monitor access outside normal hours?
- Can you retain connection logs?
- Will you coordinate with machine vendors?
- Can you support legacy production systems safely?
- Will you review vendor access quarterly?
- Can you document controls for cyber insurance?
- Will vendor access be included in incident-response planning?
- Can you help separate office and production networks?
- Will you document emergency-access procedures?
- Can you provide leadership with a remediation roadmap?
Frequently Asked Questions
What is remote vendor access in manufacturing?
Remote vendor access allows an outside technician, machine builder, software provider, automation integrator, or support company to connect to a manufacturer’s systems from another location for maintenance, troubleshooting, updates, or support.
Should machine vendors have permanent remote access?
Generally, vendors should receive only the access that is operationally necessary. Scheduled, approval-based, or just-in-time access usually provides better control than unrestricted permanent access.
Should every vendor account use MFA?
MFA should be required wherever the technology supports it, especially for remote, administrative, and production-related access.
Is a VPN enough to secure vendor access?
No. A VPN encrypts connectivity, but manufacturers must also control identity, MFA, permissions, accessible systems, connecting devices, session duration, logging, monitoring, and account expiration.
Should vendors use shared accounts?
No. Each technician should normally have a named account so activity can be attributed to an individual.
Can vendors access production equipment safely?
Yes, when access is carefully designed, limited, monitored, and coordinated with operations and the equipment vendor. Production safety, reliability, and warranty considerations must remain priorities.
What is a jump host?
A jump host is a controlled intermediary system through which a vendor connects before reaching an approved internal device. It can reduce direct exposure and improve logging, authentication, and access control.
Should vendor sessions be recorded?
Recording may be appropriate for privileged or high-risk sessions, depending on legal, contractual, technical, privacy, and storage considerations.
How often should vendor access be reviewed?
Active vendor accounts, tools, firewall rules, and permissions should generally be reviewed at least quarterly and whenever a vendor, technician, contract, system, or support relationship changes.
What should happen when a vendor relationship ends?
Disable accounts, remove remote-access software, close firewall rules, revoke certificates, rotate affected credentials, recover company-owned equipment, and update documentation.
Does cyber insurance require secure vendor access?
Requirements vary by insurer and policy. Applications may ask about MFA, remote access, privileged accounts, network segmentation, logging, endpoint security, and third-party controls.
Does zero trust mean vendors cannot connect remotely?
No. Zero trust means each access request is explicitly authenticated, authorized, limited, and evaluated rather than automatically trusted because the user is inside a network or connected through a VPN.
Why Manufacturers Choose TR Technologies
Manufacturers choose TR Technologies because we provide:
- Serving Chicagoland manufacturers since 2001
- 25 years of manufacturing IT experience
- Manufacturing cybersecurity expertise
- Secure remote-access planning
- Machine-vendor coordination
- IT and OT dependency reviews
- Network segmentation
- MFA implementation
- Firewall and VPN management
- Microsoft 365 security
- Cyber insurance readiness
- Incident-response planning
- Strategic vCIO services
- Average response under 15 minutes
- 99% uptime for managed systems
- A single point of accountability
We help manufacturers maintain essential vendor support while controlling who can connect, what they can access, when they can connect, and how their activity is monitored.
Key Takeaways
- Every remote vendor connection should be identified and documented.
- Vendor technicians should use named accounts protected by MFA.
- Access should be limited to approved systems and required privileges.
- Permanent, unrestricted vendor access should be avoided where practical.
- Controlled gateways, jump hosts, and segmentation can reduce exposure.
- Vendor sessions should be logged and monitored.
- Access should expire or be disabled after approved work is complete.
- Vendor accounts, tools, and firewall rules should be reviewed quarterly.
- Production-system changes must be coordinated with operations and authorized vendors.
- Remote access should be included in cyber insurance, incident response, NIST CSF, and business-continuity planning.
Do You Know Which Vendors Can Access Your Network?
TR Technologies helps Chicagoland manufacturers identify remote vendor connections, eliminate unnecessary access, implement MFA, segment production systems, and create controlled support workflows.
0 Comments