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Can I determine which firmware version is pre-installed without booting up the USGFLEX200H?
Can I determine which firmware version is pre-installed based on the labels on the USGFLEX200H device and the box? Best regards :) Wojtek
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[USG Flex H] - Timeout during Tailscale connection
Hello everyone, At night, I have the habit of turning off everything I'm not using; one of these is my networking, including my firewall. Every morning, I use automations to turn everything back on, and I'm finding that the firewall is no longer connected to the Tailscale network. Today checking the logs, I find this:…
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stop browsing when vpn ssl is active - USG FLEX 50H
I set up an SSL VPN, and my PC connects seamlessly to OpenVPN. However, when OpenVPN is connected, my PC stops browsing until I disconnect the VPN. How can I fix this? Thanks
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Configuration import
Is it possible to import the configuration file of a zywall usg 20 into a usg flex 200h firewall?
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How to deactivate the services
I do not see any command to deactivate How I can deactivate services I do not need ?
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Flex 200H - SSLVPN attempts to reconnect every few seconds
Hello I set up a Flex 200H with SSL VPN and installed OpenVPN Connect. This worked fine for a few weeks. Then I started using "OpenVPN Gui" which allows for an "%connection%_up.bat file to be executed as soon as the connection is running. This file starts the internal 2FA Website. This also works fine. For this I use a…
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1.37 Patch1 - Untagged traffic on P3 merged with VLAN on P2
Hello everyone, I have a VLAN created with Zyxel switch on P2, it is seen as expected. Yesterday I discovered inside an ORG that they have an old branch of LAN from warehouses with unmanaged switches that I can manage with a cable on P3. No room to pull another cable from warehouses to the new switch area where I installed…
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Flex 100H VPN SecuExtender clients connects fine; NO ACCESS to remote network devices
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SSL-Inspection causes "Content Encoding Error"
Hello everyone, We recently purchased a Zyxel USG Flex 100H, and most of the features are working well so far. However, we’ve run into an issue with SSL-Inspection. When SSL-Inspection is enabled, some websites (like YouTube) load normally, while others (like ChatGPT and Zyxel Support Forum) return a "Content Encoding…
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USG FLEX 200H - Import Certificates is broken. ( Error code: 11 )
USG FLEX 200H, firmware V1.21(ABWV.0)ITS-24WK35-m5760 When I try to import certificate the following error occurs: This error message happens for all accepted formats I tried to import. PEM (Base-64) encoded X.509 Binary PKCS#7 PEM (Base-64) encoded PKCS#7 Binary PKCS#12 Did not try Binary X.509…
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Flex 700H stops responding
Does anyone with a 700H have issues with the firewall just locking up and stop responding? Only way to recover it is to pull the plug and start again. Have the logs writing to USB and can see nothing in there that points to why it just locks up. Did have the firewall connected to a 3800 switch via DAC cable but recently…
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MAC table goes bad
Got this to happen again and on a test PC on VirtualBox USG FLEX 200H V1.37(ABWV.0) Note Source IP Spoofing Prevention was disabled when this happened To make this happen you need to have one NIC get a IP from DHCP then you don't use that NIC and use another NIC and DHCP give out the same IP due to it thinking that the IP…
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[USG Flex H] - Wireguard/Tailscale
Hello everyone, Today I've tried to configure the Tailscale VPN, but I've some questions about: Why is not possible to use Wireguard? I think that Wireguard is more affidable than Tailscale. Tailscale is a service on-top of Wireguard, end of support/develop, end of Tailscale service; instead Wireguard is a low level app,…
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1.37 uOS - Impossible to connect SSL VPN
Hello everyone, I setup a SSL VPN via Nebula, I see some issues. I'm using 10443 standard port. -1- I went here: And clicking Download button I downloaded a Zip file where the tgb file is NOT accepted by the SecuExtender app: The error shown is this one: So I had to download that zip file via On-Premise interface: And the…
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arp reply restricted
Previous to the Flex100H Series routers we were able to run the "arp reply restricted" cli command. Is there a way to do this on the H Series routers? The reason why we need this is because it is responding to arp request on the wan interface for IP's on the LAN interfaces. Old Community post that references this is below.
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Setup VPN to Home USG FLEX 500H
Hi everyone, could someone help me configure a VPN connection from my Zyxel firewall so I can connect from home? I’ve already purchased the VPN license, but I’m not sure how to set it up correctly. Any guidance would be greatly appreciated.
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Stuck on getting SSLVPN authentication with Microsoft Entra ID to work
Hi, I did follow this guide, trying to achieve SSLVPN authentication with Microsoft Entra ID SSLVPN authentication with Microsoft Entra ID — Zyxel Community Everything goes well as the guide explains, until step "6 - Click Test on the Firewall" in the section "Create OIDC AAA Server" where I got this error. I'm unsure…
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Dual Wan Failover causes DNS failure and loss of Internet
For cost reasons, I moved from a dedicated Mediacom line with Public Static IP to a 'Residential' line that is DHCP internally as well as Public DHCP externally. My Static IP WAN2 has not changed. My previous WAN Trunk was weighted round robin and worked fine. I reconfigured the WAN interface to DHCP and it picks up an…
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IPSec VPN stuck on DPD
Hi, I'm having trouble making an IPSec VPN tunnel to be established between a USG FLEX 500H v1.37 ABZH.1 located in a branch office and another firewall (not Zyxel) located at Head Quarter. Our firewall is behind the ISP's router, set in DMZ. It seems the tunnel is correctly established as the monitor page says it's…
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[USG 200HP] + [NWA130BE] + Unable to connect to Wifi
Hello community, This evening I had problems with Wi-Fi and my iPhone. My phone kept disconnecting from Wi-Fi, connecting and disconnecting in rapid succession. I tried connecting my computer to the firewall LAN, but I couldn't get a valid IP address. From my computer (Windows), I opened a command window and tried to renew…