A remote worker logging in from home, a sales colleague using hotel Wi-Fi, and an engineer supporting a site after hours may all need access to the same business systems. That convenience is valuable, but every remote connection is also a potential route into your network. To improve remote access security, businesses need controls that protect people and data without making everyday work unnecessarily difficult.
The aim is not to block remote working. It is to make access deliberate, verified and manageable. For Irish organisations with a mix of office-based, home-based and travelling staff, that means looking beyond a single VPN password and considering the full path from the user and their device to the systems they need.
Start with a clear picture of remote access
Many security gaps begin with a simple lack of visibility. Over time, businesses can accumulate old remote desktop connections, forgotten administrator accounts, personal devices, third-party support tools and cloud applications that nobody has reviewed recently. Each may have been introduced for a legitimate reason, but collectively they make access harder to control.
Start by documenting who can connect remotely, what they can reach, how they authenticate and which devices they use. Include Microsoft 365, file servers, accounting systems, line-of-business applications, network equipment and any cloud platforms that hold business data.
This exercise often reveals access that is broader than a person’s job requires. A staff member may only need access to a shared folder and email, for example, rather than a full connection to the office network. Reducing that scope limits the impact if an account or device is compromised.
Make multi-factor authentication non-negotiable
Passwords alone are no longer enough for remote access. They can be guessed, reused from another breached service or obtained through phishing. Multi-factor authentication, commonly called MFA, adds a second check such as an approval prompt in an authenticator app, a security key or a time-based code.
MFA should be applied to email, cloud applications, VPNs, remote management tools and administrator accounts. Administrator accounts deserve particular attention because they can make widespread changes quickly. A separate admin account, protected with stronger authentication, is safer than using everyday email credentials for privileged tasks.
There is a balance to strike. Staff will understandably resist security that creates repeated prompts or prevents them from working when travelling. Conditional access policies can help by requiring stronger checks when a sign-in is unfamiliar, risky or from an unmanaged device, while allowing low-risk activity from a known, compliant company laptop. The right settings depend on your applications, workforce and risk profile, but the principle is consistent: verify identity before granting access.
Replace exposed remote desktop services
Remote Desktop Protocol, or RDP, is useful for supporting servers and office computers. It is also frequently targeted by attackers when it is exposed directly to the internet. A publicly accessible RDP service can attract automated login attempts within minutes.
If remote desktop access is needed, place it behind a secure VPN, remote desktop gateway or appropriately configured zero-trust access service. Restrict which users can connect, enforce MFA and retain logs of successful and failed attempts. Do not rely on changing the default port as a security measure. It may reduce casual noise, but it does not prevent a determined scan or attack.
The same principle applies to firewalls, routers, CCTV systems and other remotely managed equipment. Management interfaces should not be open to the internet unless there is a carefully controlled and monitored business requirement.
Choose remote access technology for the job
A traditional VPN can be the right solution when staff need access to several internal systems, particularly in organisations with on-premises servers or specialist applications. It creates an encrypted connection back to the business network, but it must be properly configured, patched and limited to the resources each user needs.
For cloud-first businesses, application-level access may be a better fit. Instead of placing a user on the wider network, a zero-trust approach gives them access to a specific approved application after their identity, device and sign-in context have been checked. This can reduce the amount of network exposure, although it may require more planning where older applications are involved.
There is no single product choice that suits every organisation. The useful question is: does this employee need access to the network, a particular desktop, a specific application or simply a cloud service? Selecting the least extensive connection that still supports the job is usually the safer and more manageable option.
Secure the device as well as the connection
An encrypted connection cannot protect a laptop that is already infected, unpatched or shared with other household users. Every device permitted to access company systems should meet an agreed security baseline.
That baseline should include supported operating systems, automatic security updates, centrally managed antivirus or endpoint detection, disk encryption and screen locking. Encryption matters because a lost laptop does not have to become a data breach. It protects information stored locally when the device is switched off or locked.
Mobile device management gives IT teams the ability to check compliance, deploy updates, configure security settings and remove business data from a lost or departing employee’s device. For many small and medium-sized businesses, Microsoft 365 provides practical tools for this when configured to match how the organisation works.
Personal devices need a clear policy. Allowing them can be convenient and reduce hardware costs, but the business has less control over patching, encryption and data separation. If bring-your-own-device access is permitted, limit it to services that can be protected through app controls and avoid unrestricted access to internal systems.
Apply least privilege and review access regularly
Remote access should not be permanent simply because it was once required. Staff change roles, projects finish, suppliers move on and temporary permissions are easily overlooked. Reviewing access at planned intervals helps remove accounts and privileges that no longer have a business purpose.
Use named accounts rather than shared logins, especially for suppliers or outsourced support providers. Named accounts make activity traceable and allow access to be removed immediately when a relationship ends. Shared passwords make accountability almost impossible and are difficult to change without disrupting several people.
A sensible review should check user accounts, administrator rights, VPN groups, shared mailbox access, external Microsoft 365 sharing and remote support software. Finance, HR and senior leadership accounts may need more restrictive policies because they are common targets for fraud and impersonation.
Monitor the warning signs that matter
Good remote access security is not only about preventing entry. It is also about spotting unusual activity early enough to respond. Repeated failed sign-ins, impossible travel alerts, new administrator accounts, unexpected mailbox rules and logins from unfamiliar locations can all warrant investigation.
Centralised monitoring makes these signals easier to see. Alerts need to be tuned, however. Too many low-value notifications can cause genuine threats to be missed, while no monitoring leaves a business relying on staff to notice a problem after the fact.
Logs should be retained for long enough to support an investigation. They are particularly valuable following suspected phishing, a lost device or an employee departure. They show what account was used, when access occurred and what systems may have been affected.
Prepare for the access failure you hope never happens
Even well-managed organisations can face a compromised password, phishing incident or lost laptop. A practical response plan reduces delay when pressure is highest. Your team should know who can disable an account, revoke active sessions, isolate a device, contact key suppliers and communicate with staff.
Backups are part of this preparation. If an attacker gains remote access and encrypts files or deletes cloud data, a tested backup can be the difference between a contained incident and prolonged disruption. Keep backup systems protected with separate credentials and MFA, and test restoration rather than assuming a backup will work when needed.
For businesses without a large internal IT team, this is where an experienced managed service partner can take ownership of monitoring, patching, access reviews and incident response processes. LANCAST helps organisations put the right controls around the technology they already rely on, while keeping security practical for the people doing the work.
Remote working should give your business flexibility, not create an unseen back door. Review who has access this month, remove what is no longer needed, and make every remaining connection easier to verify, monitor and recover from.