Huawei HCIP-Security (H12-721/722/723) case studies
Huawei HCIP-Security (H12-721/722/723) · Put your knowledge to work in context.
HCIP-Security is Huawei's professional-level certification for network and security engineers who design, deploy and operate Huawei security gateways rather than merely recognise their interfaces. Candidates typically already hold HCIA-Security or have equivalent hands-on exposure to the USG series, and are moving into roles such as security implementation engineer, firewall administrator, or pre-sales/support engineer working on enterprise perimeter and branch projects. The Huawei HCIP-Security (H12-721/722/723) case studies are 5 cases and about 3,322 words.
1The Deny Rule That Never Fires and the Permit Rule That Never Matches
An enterprise runs a USG6650E in routed mode with three zones: trust (10.10.0.0/16, roughly 3,000 clients), dmz (172.16.8.0/24, eight servers) and untrust. The policy set was migrated from an older firewall and now holds 340 rules, several of them broad permits.
659 words, about 3 min2Hairpin NAT and a Partner That Whitelists Only One ISP Address
A USG6000E at HQ provides Internet access to 1,200 staff and publishes an internal CRM at 203.0.113.25:443 through a NAT Server to 10.10.30.40:443. External users reach the CRM correctly.
686 words, about 3 min3DSVPN Branches That Register but Cannot Talk to Each Other
HQ runs a USG6650E on a static address, 203.0.113.10. Forty branches use USG6510E firewalls with PPPoE dial-up, so their public addresses change daily.
650 words, about 3 min4Both Chassis Say Master: A Split-Brain After a Heartbeat Cable Swap
Two USG6650E firewalls run active/standby hot standby. HRP heartbeat uses GE1/0/7 on each chassis, joined by a single direct cable.
650 words, about 3 min5Four Million Sessions and the Request for a Bigger Box
Every weekday at 09:00, users at a 6,000-staff site report slow browsing and scattered HTTPS failures. The USG6650E shows CPU at 87%, the session table at 3.92 million of a 4 million maximum, and NAT port-allocation failure logs appearing every few seconds.
677 words, about 3 min