Your Request First Hop For Secure Scalable and Smart decision
February 04, 2026

Your Request First Hop For Secure Scalable and Smart decision

Anonymous | TrustRadius Reviewer
Score 8 out of 10
Vetted Review
Verified User

Overall Satisfaction with F5 BIG-IP DNS

-F5 BIG-IP DNS provides Global Server Load Balancing (GSLB), intelligently distributing client traffic across multiple data centers, such as primary (DC) and disaster recovery (DR) sites.
-Client side initiated requests are processed as DNS queries and directed to the appropriate data center, ensuring optimal performance, resilience and high availability.
-The system continuously performs health checks on destination servers in both DC and DR locations, routing traffic only to endpoints that are verified as healthy
-Also mitigates DDos attacks and malicious queries
-Directs client requests to nearest and optimal response data centers,
-Provides hybrid support in directing traffic between on prem and cloud hosted applications
-It also reduces a lot of manual man power by automatically failover and diverting the traffic without losing business
-F5 BIG-IP DNS works more robustly by integrating it with F5 BIG IP Advance firewall Manager as it allows to configure security profiles that provides more granular level of protection

Pros

  • Routing the traffic to multiple data centers deployed in different locations
  • Examines the servers health, performance metrics and do evaluation on the basis of geography as well to redirect queries to optimal destination
  • Provides rate limiting feature to mitigate DDos and DNS flood attacks
  • Best in routing the traffic to multiple clouds including on prem resources
  • Faster results of the queries and reduced latency is one of the biggest advantages of F5 BIG-IP DNS

Cons

  • Implementing iRules requires advanced expertise, and additional vendor resources or guidance would significantly ease adoption for clients
  • While the user interface is intuitive, many tasks demand extensive manual effort. Greater automation across both UI and CLI would reduce operational overhead and improve efficiency.
  • similar limitation is observed in BIG‑IP ASM, where analytics lack sufficient granularity to support detailed task execution and effective implementation planning
  • Saved almost 1.2 million USD for one of critical activities as downtime could have posed this but due to failover based on health checks saved these bucks
  • Business impact which can be caused due to DDos attacks avoided
  • High cost licensing as mentioned earlier as well
  • Analytical limitations as F5 has also mentioned multiple it’s not an analytical tool
Most important usability of F5 BIG-IP DNS is it’s stability which other vendors lack
-As mentioned earlier as well, it’s scalability is humongous as it can honour millions of request per second without latency
- irules feature makes it top and worthy to fight with top contenders like cloudflare and Cisco
- Moreover it’s stable even when the Rate Per second is high and at the same time, DDos occurs
- Interface is user friendly for simple tasks but requires more manual work
- TAC should provide more assistance when it comes to normal support as well but they do offer professional support license for tasks which other vendor assist on normal license as well

Do you think F5 BIG-IP DNS delivers good value for the price?

Yes

Are you happy with F5 BIG-IP DNS's feature set?

Yes

Did F5 BIG-IP DNS live up to sales and marketing promises?

Yes

Did implementation of F5 BIG-IP DNS go as expected?

Yes

Would you buy F5 BIG-IP DNS again?

Yes

Less appropriate:
- Not best bet for startup’s as their budget is always tight
- Not good for those companies where the engineers are not highly skilled otherwise the use Irules and security policies will not be utilised in optimal manner as it requires more cpu resources to work especially irules
- For companies fully on cloud doesn’t best fit as I already highlighted cloud require more improvements when it comes to seamless performance
Best Suited
-Large enterprise companies where budget is not an issue
- Companies whose traffic Rate Per Second is very high as it can handle huge RPS without latency
- Companies whose business is surely depends on their availability

Comments

More Reviews of F5 BIG-IP DNS

  1. Home
  2. Load Balancing Software
  3. F5 BIG-IP DNS Reviews
  4. User Review of F5 BIG-IP DNS