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FortiGate · Sep 20, 2026

Intermediate2 min read

Prerequisites: FortiGate administration, DNS and basic CLI troubleshooting.

FortiDDNS connectivity issues on FortiGate: field-tested workaround

Many FortiGate administrators are facing FortiDDNS connectivity issues, including failures when creating or updating FortiDDNS entries through the GUI. Based on field testing, the issue has been observed across different…

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F5 · Aug 29, 2026

Advanced5 min read

Prerequisites: TCP flows, packet captures, F5 BIG-IP virtual servers and FortiGate firewall policies.

Application down behind F5: VIP reachable, pool healthy – so where did the traffic stop?

The application team reported an outage, yet the F5 VIP was reachable and pool members were healthy. This field case shows how packet captures isolated the missing link.

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