GL-BE3600 (Slate7) – No Internet in Router Mode (DNS Broken for Clients, Only Works in Repeater) – Tried All Fixes

Hi,

I’m having a major issue with my GL-BE3600 (Slate7). It only works in Repeater mode. In Router mode (WAN cable from my main router), all my devices (MacBook, iPhone) get an IP and can ping 8.8.8.8, but cannot resolve domains or access the internet (ping google.com fails). The router itself can resolve domains, but clients cannot.

What I’ve tried:

  • Flashed both 4.7.1 and 4.7.2 firmware, with multiple factory resets (never kept old settings)

  • Set manual DNS (8.8.8.8, 1.1.1.1) on router and clients, enabled “Override DNS for all clients”

  • Checked and changed firewall, NAT, DHCP, and dnsmasq settings (including masquerading, rebind protection, and static/DHCP WAN)

  • Disabled IPv6 on both router and clients

  • Reinstalled and restarted dnsmasq, checked for conflicting services

  • On Mac: flushed DNS cache, renewed DHCP, tried static/manual DNS, created new network location, disabled IPv6

  • Same problem on iPhone and all other clients (so not a Mac-only issue)

  • No custom scripts or packages, no VPN or AdGuard, just a clean setup

Symptoms:

  • In Router mode:

  • Clients get IP, can ping 8.8.8.8, but cannot resolve domains (ping google.com fails, browsers don’t load)

  • nslookup/dig work (direct DNS queries succeed), but system resolver (ping, browsers) fails

  • Router itself can resolve DNS and ping domains

  • In Repeater mode:

  • Everything works fine

Other notes:

  • Main router works fine for all other devices

  • Tried both LAN and Wi-Fi clients, DHCP and static WAN, nothing helps

  • opkg update fails (connection timeout), but router time is correct

Question:

Why does the BE3600 only work in Repeater mode? Is this a firmware bug, hardware issue, or something else?

Any help or insight would be greatly appreciated!

Logs and config available if needed.

Thanks!

  • What is the IP of the WAN interface?

The Slate7 gets a WAN IP from my main router, for example: 10.0.0.x.

  • What is your subnet IP range on the LAN side?

The Slate7’s LAN subnet is 192.168.8.x.

  • Do you have VPN on or not?

No VPN is enabled—this is a clean, default setup.

  • What is the DNS of the router itself?

I have set the router’s DNS to 8.8.8.8 and 1.1.1.1 (Google), and also tried Cloudflare (1.1.1.1). I’ve tested both automatic and manual DNS settings.

  • Have all your clients use the Slate Gateway IP as their DNS:

Yes, I have tried setting the clients’ DNS to the Slate7’s LAN IP (192.168.8.1), as well as directly to Google and Cloudflare DNS.

  • Result: No matter what, clients can ping external IPs (like 8.8.8.8), but cannot resolve domain names using system tools (ping, browsers).
  • However, nslookup and dig on the clients do work and return correct results, but normal DNS resolution fails.

Summary:

  • WAN IP: 10.0.0.x
  • LAN subnet: 192.168.8.x
  • No VPN
  • Router DNS: 8.8.8.8 / 1.1.1.1 (also tried Cloudflare)
  • Clients set to use Slate7 gateway as DNS (also tried Google/Cloudflare directly)
  • Router itself resolves DNS fine; clients only succeed with nslookup/dig, not with system resolver.

Yes, the cable is definitely connected from the WAN port on the Slate7 to a LAN port on my main router (not the WAN port). I’ve double-checked the wiring and it’s correct. The Slate7 gets a proper WAN IP from the main router, and clients get IPs from the Slate7’s LAN. The issue only happens in Router mode—Repeater and Tethered modes work fine.
So, unfortunately, it’s not a wiring issue.

I tested tethered mode with my iPhone connected via USB cable, and it works—clients have full internet access in both Repeater and Tethered modes. The problem only happens in Router mode with a wired WAN connection from my main router. That’s the mode I need to get working.

  • What IP address does the Slate get assigned (Ethernet vs. Repeater)?

The Slate7 gets an IP in the same network range from the main router in both Ethernet (router mode) and Repeater mode. The network settings (IP, gateway, DNS) are consistent.

  • Is the Wi-Fi being broadcast by the same router device?

The main ISP router has its own Wi-Fi network, and my Slate7 also broadcasts its own separate Wi-Fi network.

  • In Repeater mode, the Slate7 extends the main router’s Wi-Fi, and everything works fine for connected devices.

  • In Router mode, the Slate7 pulls its settings from the main router via WAN and creates a separate LAN and Wi-Fi network (192.168.8.x).

The problem only happens in Router mode: devices connected to the Slate7’s LAN or Wi-Fi can’t resolve domains or access the internet, even though the Slate7 itself can.

  • Do you have a separate modem and router, or all-in-one?

It’s an all-in-one device from my ISP (modem and router combined).

Summary: The main router’s Wi-Fi works fine. The Slate7’s Wi-Fi (in Router mode) is a separate network, and that’s where the DNS/internet problem happens for clients—even though the Slate7 itself gets the correct settings and can resolve domains.

It sounds that this issue is really strange.
Could you please share a remote access to your laptop or share the router via our GoodCloud?
Technical Support via GoodCloud - GL.iNet Router Docs 4

Not as strange as BugyClouds forgetting—again—that I already signed up...
Now I’m locked out and can’t even reset my password.

So many “strange” problems I never had with my cheaper (and honestly better) TP-Link routers.
What’s the next step in this magical mystery tour?

I assume you need to reset your GoodCloud password, the reset email is received, click Go GoodCloud, please enter the new password directly and submit it.

Please make sure that the email/account you entered is correct.
I tested in my side, this issue is not reproduced, please check it one more time.

Update:
May I know is the initial letter of your account capitalized?
There seems to be an issue, already asked R&D to check.

Please try to reset the password by filling the email address in all lowercase, and it is supposed to receive the email of reset the password.

You may add DNS forwards under DHCP & DNS in the Networking tab on your Slate7.

Hi, what's the command and output like?
If enabled “Override DNS for all clients”, the DNS queries go by the same path.