Troubleshoot Asus router issues for OpenVPN setup. Adjust configuration steps accordingly.
Troubleshoot Asus router issues for OpenVPN setup. Adjust configuration steps accordingly.
Hello, I just got a new Asus router (ASUS RT-AC86U) and want to set up an OpenVPN using the VPN server. I connected it to my ISP's router (HUAWEI HG8245H). The issue is that when trying to configure the VPN or DDNS, I see a warning: "The wireless router currently uses a private WAN IP address. This router may be in a multiple-NAT environment and DDNS service cannot work in this environment." According to the FAQ, I need to set up the VPN with forwarding ports. Can someone assist me with this setup?
Start by removing dual NAT settings. Dual-NAT often causes problems like high latency and packet loss or connectivity issues. Consider why you have two routers in the first place. If you need Asus to support OpenVPN or WiFi, disable its NAT and DHCP functions and configure it as an Access Point. Then set up port 1194 UDP or TCP for forwarding between Huawei and Asus using port forwarding. This requires admin access to the router.
Confirming what @jj9987 mentioned is accurate. Use only one router, ideally the ISP's device. Configure the Asus router as an access point and assign a static IP on the LAN ports for future management. Once set up, connect it via LAN-to-LAN and avoid linking the ISP router to the Asus's WAN port.
The HUAWEI HG8245H serves as a modem with a fiber cable connected, but the Asus router can't replace it as a modem. I have to connect it to the HUAWEI instead. I attempted to set up the Asus router as an access point, but the WAN VPN settings disappeared. It seems it only functions properly when the Asus is in router mode, similar to the setup found at https://www.snbforums.com/threads/can-i-...ode.11893/. I need to use the VPN server configuration from the Asus router and also utilize their DDNS service.
Using the HUAWEI HG8245H in modem mode enables public IP access on your Asus router, resolving double-NAT problems and ensuring proper setup. When the device operates in modem mode, it functions as a bridge, forwarding the external IP directly to the router. This setup allows you to configure OpenVPN according to your needs.
It's a GPON connection, not a modem. Modems handle DSL, DOCSIS and possibly other links. If true, you might face dual-NAT issues or create your own VPN on a device like a Raspberry Pi and forward ports. Many guides exist for this setup. You can also configure DDNS on a Raspberry Pi.