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How to configure IPv6 IPSec VPN (USG FLEX/ATP)
Scenario: This guide explains how to set up an IPv6 IPsec VPN connection between two locations using Zyxel USG FLEX/ATP firewalls, such as a headquarters and a branch. Before You Begin Ensure the IPv6 setting is enabled on your firewall. Follow this guidance article for instructions. How to Enable IPv6 Settings on Firewall…
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Cannot connect Remote VPN deplopyed by mobileconfig since iOS18
Symptom: You cannot connect Remote VPN which deployed by mobileconfig since iOS18, You have to create VPN profile manually as alternative Workaround: 1)edit mobileconfig by notepad Find the following lines <key>LocalIdentifier</key> <string></string> and change to <key>LocalIdentifier</key> <string>Zyxel</string>
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Why does my Android connect to IKEv2 remote access VPN but cannot access other LAN?
Question: Why does my Android connect to IKEv2 remote access VPN but cannot access other LAN? Answer: If you follow this FAQ to set up IKEv2 remote access VPN, IKEv2 VPN with Pre-Shared key on Mobile Devices (Instead of L2TP) — Zyxel Community, please try to set the configuration payload. Some Android might not be able to…
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How to import TGB profile in MACOS
Question: How to import TGB profile in MACOS Answer: 1)Select import 2)Choose the File with .tgb extension
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How to Configure IKEv2 VPN for macOS 15 on old USG/ZyWALL series?
Question: What are the settings for configuring IKEv2 VPN on macOS 15 (Sequoia) using Zyxel USG40 and other USG/ZyWALL using firmware 4.73 patch 2? Answer: To set up IKEv2 VPN for macOS 15 (Sequoia) with the Zyxel USG40 and other USG/ZyWALL devices, use the following configurations: Phase 1 (Gateway) Encryption Algorithm:…
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What are the settings for configuring L2TP VPN on macOS 15 (Sequoia) using old USG/ZyWALL series?
Question: What are the settings for configuring L2TP/IPSec VPN on macOS 15 (Sequoia) using old USG/ZyWALL series? Answer: To configure L2TP VPN for macOS 15 (Sequoia) with the Zyxel USG40 and other USG/ZyWALL using firmware 4.73 patch 2, please follow these settings based on the successful configurations: Phase 1 (Gateway)…
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Why my Android phone cannot connect to IKEv2 remote access VPN with Pre-Shared key?
Question: Why my Android phone cannot connect to IKEv2 remote access VPN with Pre-Shared key? Answer: If you follow this FAQ IKEv2 VPN with Pre-Shared key on Mobile Devices (Instead of L2TP) — Zyxel Community but encounter connection failure, please check if your Pre-Shared key has big capital and change it to small…
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IKEv2 VPN with Pre-Shared key on Mobile Devices (Instead of L2TP)
This article will show you how to connect mobile phones (Android and iPhone (iOS)) with IKEv2 PSK (pre-shared key) instead of L2TP. Because in Android 12 and later, L2TP support is no longer available. This article will also look at how to set up IKEv2 PSK for iOS users. First, we need to set up the Tunnel on our Firewall;…
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Why can't I ping servers over VPN when IKEv2 VPN is established on SecuExtender?
Question: IKEv2 VPN is established on SecuExtender. However, I cannot ping the gateway IP of USG FLEX or servers in LAN. Answer: Review the Two-Factor Authentication (2FA) settings:* Navigate to Object > Auth. Method > Two-Factor Authentication > VPN Access. * Check if 2FA is enabled for all VPN services and users. * If…
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How to resolve SecuExtender VPN Error Code 70?
Question: I am encountering Error Code 70 while trying to activate SecuExtender VPN, even though I have administrative rights. How can I resolve this? Answer: Error Code 70 typically indicates that the VPN client cannot access the licensing server to get the authorization token needed for activation. To resolve this issue,…
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How to Resolve VPN Certificate Issues Between uOS and ZLD Devices?
Question: What should I do if the self-generated certificate from uOS can't be used for IKEv2 VPN on ZLD devices? Answer: If you encounter an issue where a self-generated certificate from a uOS device cannot be used for an IKEv2 VPN gateway profile on ZLD devices, follow these steps: * The issue arises due to the ZLD VPN…
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Why does the L2TP VPN not work on Windows 10 but works fine on Windows 11?
Question: Why does the L2TP VPN not work on Windows 10 but works fine on Windows 11? Answer: This issue can be related to certain Windows updates that interfere with VPN connections. Specifically, the patches KB5036893 and KB5036892 released by Microsoft have been known to break VPN functionality. Suggestion: To resolve…
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Is SecuExtender compatible with Microsoft SurfacePRO with ARM processor?
```html Q: Is SecuExtender compatible with Microsoft SurfacePRO with ARM processor? A: No, SecuExtender is not compatible with ARM processors. While the installation may complete successfully, the application will not run on ARM-based devices. It is recommended to use Windows built-in VPN for devices running on ARM…
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Why can't you establish an SSL VPN connection with the USG Flex/ATP models?
Question : While establishing the SSL VPN connection, it will be disconnected shortly. Why can't you establish an SSL VPN connection? Answer : The possible reason is that Two-Factor Authentication for SSL VPN Access is enabled, but the user account has not been activated yet. Please disable this option, as shown below:…
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How to fulfill split tunnel for Windows native VPN with IKEv2?
Question: How to fulfill split tunnel for Windows native VPN with IKEv2? Answer: In the current design, Windows native VPN interface can't separate Internet traffic from VPN tunnel. The only way to fulfillit is to create an additional routing on your PC. Disable PC default gateway from your VPN interface. 1.Go to Control…
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Does Windows native VPN support split tunnel?
Question: This problem is on the Windows native VPN, it does not support split tunnel, so even set it as a split tunnel, Windows still does not create a route after installing the script. Answer: No. The problem is on the Windows native VPN, it doesn't support split tunnel. So even we set it as split tunnel, Windows still…
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L2TP VPN doesn't work on Windows 10, but it works perfectly on Windows 11. What should I do?
Question My L2TP VPN on Nebula doesn't work on Windows 10, but it works perfectly on Windows 11. What should I do? Answer It looks like the issue you're experiencing is related to specific Windows updates on Windows 10. The patches KB5036893 and KB5036892 have been reported to break VPN connections. To resolve this issue,…
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Can we export the cfg from a perpetual VPN client and import it into time-based VPN client?
Question Can we export the configuration file from a perpetual VPN client V3.8.204.61.32 and import it into a time-based VPN client V7.7.40.019 or V6.6.87.108? Answer Since the feature sets of the perpetual VPN client and the time-based VPN client are different, we can not import the configuration from a perpetual VPN…
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Intel® Killer™ Control Center casue SSL VPN disconnecting immediately
If you are experiencing SSL VPN disconnecting immediately after connecting, it might be related to the Intel's Killer Control Center. To troubleshoot this issue, follow these steps: Disable the Killer Network Service. If disabling the service resolves the problem, please contact Zyxel Support for further helps
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How do I set up NAT port forwarding for remote AP usage on the firewall?
Scenario : Users may wish to use the remote AP service behind a NAT scenario. For example, in the topology below, the remote AP will establish a VPN service to the destination firewall USG Flex 100. Remote AP === internet === USG Flex 200 === (NAT ports forwarding) === USG Flex 100 Users may wonder how to set up NAT port…