SPECIAL DOMAIN
Captive portal → RADIUS stack → authentication → payment integration → multi-site aggregation. Specialist area, twenty years deep.
WiFi authentication for train stations, ports and city centres — from the captive portal UI to RADIUS aggregation across multiple sites.
When this pattern fits
Standard captive portals cover the mass use case — special situations need deep intervention.
FreeRADIUS and friends hit their limits as soon as multi-site roaming, sub-contracting or custom tariff logic come up.
Hardware stacks and customer branding should not collide — and operations should stay with the network partner.
How the pattern is built
Branded, multilingual, locally adapted.
Custom aggregator where needed.
VIP classes, vouchers, roaming.
Card, voucher, tariff logic.
Seamless transition between sites.
Live example
Customer Deutsche Bahn AG WIFI & CAPTIVE PORTALS
Surfing on the ICE on the move, then carrying on in the station WiFi at the next stop without signing in again — under the hood that's a RADIUS aggregator we built for Deutsche Bahn, and it works where standard RADIUS servers (FreeRADIUS and friends) hit their limits.See the case
What is deliberately out of scope
Custom hardware. We deliver adaptations on existing infrastructure, not a second server stack.
Operations 24/7. The network partner runs the service; we develop and hand over.
A generic SaaS WiFi platform. Every pattern is tailored to your site — by design.
What the pattern covers
Captive-portal interfaces with site-specific branding and multi-language support.
RADIUS authentication — custom stacks where FreeRADIUS and friends hit their limits.
Payment and tariff logic embedded into the portal, integrated with existing billing systems.
VIP and class differentiation for transport operators and hospitality.
Multi-site aggregation: seamless roaming between train, station and city centre.
Operations hand-over to the network partner — no second hardware estate.
Why evanto
WiFi authentication is not a field one picks up on the side. We have been building captive portals for hospitality, transport operators and city centres since the early 2000s — from Deutsche Bahn through Monaco Telecom to TER Dakar in Senegal. Where standard stacks hit their limits, we know the way through.
Cases at a glance
Selected sites where evanto captive portals run today.
Deutsche Bahn AG
Surfing on the ICE on the move, then carrying on in the station WiFi at the next stop without signing in again — under the hood that's a RADIUS aggregator we built for Deutsche Bahn, and it works where standard RADIUS servers (FreeRADIUS and friends) hit their limits.
Monaco Telecom
Yacht crews, port guests, and berth tenants at the port of Monaco book their WiFi access directly in the browser, pay by card via Ingenico — and receive credentials plus a PDF invoice by email, all in minutes and without a concierge desk.
Ucopia France
Travellers on the express train between Dakar and the international airport sign in to the on-board WiFi via a multilingual captive portal — with local language and design adaptation, and dedicated VIP user management for premium classes.
Typical project scope
One to two weeks. We understand your concrete bottleneck, look at the available sources and decide together whether the pattern is really the right answer here.
Four to eight weeks. A scoped variant on real data, with a small user group. Dry-run before every write, clearly defined success criteria.
From two months onwards, fluid. Extension to further sources, teams or sites. Hand-over to operations with documented architecture and training for those responsible.
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