VPN-friendly DNS security that
actually gets deployed.
DefensX gives you DNS-layer protection that works with — not against — your
existing VPN, firewalls, and SASE stack. Protect roaming users, branch offices,
and contractors without breaking tunnels or rewriting your network.
Drop DefensX in alongside your existing VPN — no agent rip-and-replace, no
fragile split-tunnel hacks.
Problem
Why DNS security breaks so often in VPN-heavy environments
DNS-layer security is powerful on paper — but in real networks, VPN clients, split
tunnels, and roaming devices make policy enforcement fragile. The result: tools that
look good in diagrams, but silently fail for the users that need them most.
Conflicting DNS paths
Real-world headache
●VPN clients overwrite DNS settings and bypass your secure resolvers.
●Split-tunnel rules behave differently on laptops, mobiles, and branches.
●Cloud apps and SaaS tools resolve outside your security stack entirely.
●End users see “no internet” and blame your security product.
VPN DNS overwriteSplit-tunnel driftInconsistent policy
Unseen phishing & data exfiltration
Silent risk
●Remote users connect from home, co-working, and hotel networks you don't control.
●Shadow IT domains and unsanctioned SaaS slip past VPN-only controls.
●DNS is used for command-and-control, tunneling, and data exfiltration.
●By the time EDR triggers, the DNS decision was already lost.
Remote workShadow ITC2 & tunneling
How DefensX Helps
DNS security that understands VPNs, not fights them
DefensX gives you a VPN-aware DNS layer that works in real MSP and enterprise
environments — where multiple VPNs, roaming devices, and hybrid networks are the norm.
1
Drop-in DNS enforcement
Point internal resolvers, VPN DNS, or DHCP scopes to DefensX. No agents
required, no need to rewrite your network overnight.
2
VPN-aware policy logic
Policies can differ for on-tunnel vs. off-tunnel traffic, remote workers,
contractors, and branches — without complex split-tunnel gymnastics.
3
Threat intelligence + Zero Trust
Apply real-time threat feeds and your own allow/block lists. Route risky
destinations into isolated browser sessions instead of a hard block.
4
Unified reporting for VPN & non-VPN traffic
See which users, tenants, and locations drive risk — regardless of which
VPN client or access path they use.
Before DefensX: DNS blind spots
Typical symptoms
VPN & DNS constantly “fighting”
Inconsistent blocking across users
Business impact
Phishing & malware slip through
Helpdesk swamped with VPN tickets
After DefensX: VPN-friendly DNS
What changes
DNS rules applied on and off VPN
Fewer “internet is broken” tickets
Security outcomes
More blocked threat domains
Cleaner audit & compliance story
Key Capabilities
Designed for VPN-heavy, hybrid, and MSP networks
Bring DNS security to the places where legacy tools struggle: mixed VPN clients,
roaming endpoints, and multi-tenant customer environments.
VPN-aware resolution
Co-exists with your VPN
Works alongside FortiClient, OpenVPN, SonicWall, Pulse Secure and others —
without forcing a rip-and-replace project.
Threat intelligence
Block what matters
Stops phishing, malware, C2, and newly registered domains using continuously
updated intelligence and customer-specific lists.
Isolation-aware
Route to safe browsing
Risky domains can open in an isolated browser session instead of being outright
blocked — reducing user friction while containing threats.
Per-tenant policies
MSP-grade multi-tenancy
Clean separation between customers with shared policy templates and reporting
designed for QBRs and SLAs.
Identity-aware
User & group-aware rules
Apply different DNS controls for finance, developers, contractors, and
executives — mapped to your identity provider.
Unified telemetry
DNS trails you can explain
Tie DNS events to users, devices, and locations so investigations aren’t stuck
guessing which VPN client did what.
Who Benefits
Give both MSPs and security leaders what they want
DefensX VPN-friendly DNS security reduces operational friction for MSPs while
strengthening the threat model for CISOs and security teams.
For MSPs & service providers
Standardize DNS security across a messy mix of VPN clients, hardware,
and customer environments — without rewriting every network.
●Offer DNS security as a managed add-on to your VPN services.
●Cut down “VPN broke my internet” tickets with predictable behavior.
●Show blocked threats and risky domains in QBRs and renewal decks.
Keep your VPN, firewalls, and network design — but finally get DNS-layer
enforcement that follows users wherever they connect from.
●Close DNS blind spots for remote, roaming, and contractor devices.
●Align DNS logs with your SIEM, EDR, and SOC workflows.
●Support Zero Trust initiatives without forcing a VPN migration.
DNS evidence for incidentsZero Trust-alignedCompliance-friendly
FAQ
FAQ: VPN-friendly DNS security with DefensX
Questions your customers, VPN owners, and security stakeholders will ask —
with clear answers you can use in proposals and internal reviews.
“Do we need to replace our existing VPN?”
No. DefensX VPN-friendly DNS is designed to work alongside your existing
VPN clients and concentrators. You decide when, or if, a VPN migration
ever happens — DNS security doesn’t have to wait.
“What happens if DNS security conflicts with the VPN?”
DefensX policies are built with VPN behavior in mind. You can create
different rules for on-tunnel and off-tunnel traffic, and gradually tighten
enforcement as you see how users actually work.
“Can we start with a single group or site?”
Yes. Most customers begin with one tenant, region, or remote user group.
Once you’re happy with the behavior and visibility, you expand DNS
enforcement across additional locations and VPN profiles.
Perfect companion to DefensX Zero Trust Remote Access
Many customers pair VPN-friendly DNS security with DefensX browser-based
Zero Trust access. DNS protects where users are going; the browser controls
what they can actually do when they get there.
●DNS blocks known bad, isolation handles “gray” destinations.
●Consistent policy across branch, remote, and cloud access.
●One story for Zero Trust, remote work, and ransomware defense.
Turn your VPN into a safer on-ramp — not your only defense.
DefensX VPN-friendly DNS security lets you keep your current VPN strategy
while finally getting reliable, measurable protection at the DNS layer.
①Identify VPN profiles, branches, and roaming users with DNS blind spots.
②Point DNS for a pilot group to DefensX and review the first 30 days of data.
③Refine policies, then roll out across additional tenants and locations.
④Feed DNS events into your SOC, SIEM, and QBR reporting.
