Model USG FLEX 100H USG FLEX 200H
Product photo USG FLEX 100H USG FLEX 200H
Hardware Specifications
Network
Interfaces
100M/1G Ethernet (RJ-45) 8 6
100M/1G/2.5G Ethernet (RJ-45) - 2
1G/2.5G/5G/10G Ethernet (RJ-45) - -
1G SFP/10G SFP+ - -
USB 3.0 Type-A 1 1
Console port Yes (RJ-45) Yes (RJ-45)
Rack-mountable - Yes
Fanless Yes Yes
System Capacity & Performance*1
SPI firewall throughput (Mbps)*2 4,000 6,500
VPN throughput (Mbps)*3 900 1,200
IPS throughput (Mbps)*4 1,500 2,500
Anti-Malware throughput (Mbps)*4 1,000 1,800
UTM throughput (Anti-Malware and IPS)*4 1,000 1,800
Max. TCP concurrent sessions*5 300,000 600,000
Max. concurrent IPSec VPN tunnels*6 50 100
Recommended gateway-to-gateway IPSec VPN tunnels 20 50
Concurrent SSL VPN users 25 50
VLAN interface 16 32
Speedtest Performance
SPI firewall throughput (Mbps)*7 931.61 929.97
Key Features
Security
Service*8
Anti-Malware Yes Yes
IPS Yes Yes
Application Patrol Yes Yes
Web Filtering Yes Yes
Reputation Filter Yes Yes
SecuReporter Yes Yes
Sandboxing Yes Yes
Security Profile Sync Yes Yes
Device Insight Yes Yes
SSL (HTTPS) Inspection Yes Yes
Two-Factor Authentication Yes Yes
SD-WAN &
VPN
WAN load balancing Yes Yes
Prioritize critical applications Yes Yes
VPN VPN Protocol IKEv2/IPSec, SSL, Tailscale*9 IKEv2/IPSec, SSL, Tailscale*9
Nebula SD-VPN Yes Yes
Auto-link VPN Yes Yes
Manual-link VPN Yes Yes
VPN Topology Yes Yes
WLAN
Management
Default Number of Managed AP 8 8
Secure WiFi*8 Yes Yes
Maximum Number of Tunnel-Mode AP*10 6 10
Maximum Number of Managed AP 24 40
Recommend max. AP in 1 AP Group 10 20
Management &
Connectivity
Nebula Centralized Management Yes Yes
Device HA - Yes
Link Aggregation (LAG) Yes Yes
Concurrent devices logins (max.)*11 64 200
Burst login rate (users/30sec) 64 200
Power Requirements
Power input 100H: 12V DC, 2A max. 200H: 12V DC, 2A max.
Max. power consumption (Watt max.) 100H: 17 / 100HP: 51.2 200H: 22 / 200HP: 62
Heat dissipation (BTU/hr) 100H: 40.365 200H: 58.75
Physical Specifications
Item Dimensions (WxDxH) (mm/in.) 216 x 143 x 33 / 8.50 x 5.63 x 1.30 272 x 187 x 36 / 10.7 x 7.36 x 1.42
Weight (kg/lb.) 100H: 1.04 / 2.29 200H: 1.52 / 3.34
Packing Dimensions (WxDxH) (mm/in.) 278 x 189 x 99 / 10.94 x 7.44 x 3.89 427 x 247 x 73 / 16.81 x 9.72 x 2.87
Weight (kg/lb.) 100H: 1.62 / 3.57 200H: 2.43 / 5.36
Included accessories • Power adapter
• RJ-45 to RS-232 cable for console connection
• Power adapter
• RJ-45 to RS-232 cable for console connection
• Rack mounting kit (optional, by regions)
Environmental Specifications
Operating Temperature 0°C to 40°C / 32°F to 104°F 0°C to 40°C / 32°F to 104°F
Humidity 10% to 90% (non-condensing) 10% to 90% (non-condensing)
Storage Temperature -30°C to 70°C / -22°F to 158°F -30°C to 70°C / -22°F to 158°F
Humidity 10% to 90% (non-condensing) 10% to 90% (non-condensing)
MTBF (hr) 100H:
40°C / 353878.1057 hr
25°C / 602150.9604 hr
200H:
40°C / 306768.409 hr
25°C / 528037.0106 hr
Acoustic noise - -
Certifications
EMC FCC Part 15 (Class B),
CE EMC (Class B),
RCM (Class B), BSMI
FCC Part 15 (Class B),
CE EMC (Class B),
RCM (Class B), BSMI
Safety LVD (EN62368-1), BSMI LVD (EN62368-1), BSMI

*: This matrix with firmware uOS1.36 or later.
*1: Actual performance may vary depending on system configuration, network conditions, and activated applications.
*2: Maximum throughput based on RFC 2544 (1,518-byte UDP packets).
*3: VPN Throughput measurement are based on RFC2544 (1,424-byte UDP packet).
*4: Anti-Malware (with Express Mode) and IPS throughput is measured using the industry standard HTTP performance test (1,460-byte HTTP packets). Testing done with multiple flows.
*5: Maximum sessions are measured using the industry standard IXIA IxLoad testing tool.
*6: Including Gateway-to-Gateway and Client-to-Gateway.
*7: The Speedtest result is conducted with 1Gbps WAN link in real world and it is subject to fluctuate due to quality of the ISP link.
*8: Requires a Zyxel service license to enable or extend feature capacity. SSL (HTTPS) inspection and Two-Factor Authentication are default supported features for any registered USG FLEX H device.
*9: Local GUI only.
*10: Available in Q3, 2026.
*11: This is the recommend maximum number of concurrent logged-in devices.