ZDNS-GSLB review
Health-aware DNS routing for organizations managing multiple data centers.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
ZDNS-GSLB is a DNS-based global server load-balancing product for organizations operating multiple data centers and IP endpoints. It is positioned for mid-market and enterprise teams that need DNS traffic scheduling, application health monitoring, availability management or disaster recovery across data centers. Its central purpose is to resolve users toward data centers based on health and proximity rather than provide a general-purpose DNS service.
Health monitoring is a defining part of its routing approach. The vendor describes Layer 4–7 probes, with HTTP, HTTPS, UDP, TCP and ICMP probe types, as well as custom probes across data centers and network providers. Scheduling options include weighted round robin, global availability and static proximity. Together, these features address teams that need health-aware or proximity-based DNS decisions; buyers looking for a broader network management suite should assess whether this focused scope fits their requirements.
Configuration workflows include third-party synchronization, loading and restoration, which may matter for organizations coordinating GSLB settings with existing systems. According to the vendor’s pricing model, buyers need to contact sales rather than select a published self-serve plan. That makes ZDNS-GSLB a more natural fit for organizations evaluating it as part of an infrastructure purchase than for teams seeking transparent, immediately comparable pricing. Choose it when multi-data-center DNS scheduling and health probes are the core need; consider alternatives if published pricing or a wider platform scope is essential.
ZDNS-GSLB pros and cons
- Where it wins
- Routes DNS traffic across multiple data centers and IP endpoints
- Checks application health with Layer 4–7 probes, including HTTP and TCP
- Offers weighted round robin, global availability and proximity scheduling
- Where it doesn't
- Pricing requires a sales inquiry
- Focused on multi-data-center DNS traffic management
- Configuration synchronization depends on third-party systems
ZDNS-GSLB fact sheet, pricing and score →
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