Practical lessons from years of solving production incidents across firewalls, VPNs, routing, cloud, wireless and application delivery.
Structured troubleshooting cases show the environment, evidence, dead ends, root cause, fix and prevention—not just the final command.
Prerequisites: FortiGate administration, DNS and basic CLI troubleshooting.
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…
Prerequisites: TCP flows, packet captures, F5 BIG-IP virtual servers and FortiGate firewall policies.
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.
Explore vendor-based security alerts, affected products and remediation updates.
Environment → problem → symptoms → assumptions → investigation → commands and logs → dead ends → root cause → fix → verification → prevention.
Get focused help with troubleshooting, firewall and VPN reviews, network design, security architecture or incident assistance.
| Service | Typical engagement |
|---|---|
| Quick consultation | 30 minutes |
| Troubleshooting session | 1–2+ hours |
| Firewall / configuration review | Hourly |
| Network design review | Hourly or project |
| Security architecture review | Hourly or project |
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