Unraid server (version 7.2.2, Ubiquiti Dream Router 7/UDR7) shows correct IP address via ip route show, but cannot connect to internet. Local network pings work fine (e.g., router, other LAN devices), but external pings (e.g., 8.8.8.8, google.com) fail. Changing DNS servers (tried 8.8.8.8, 1.1.1.1, ISP DNS) did not help. Why Pi-hole bridge works but host doesn't?

Symptoms:

ip route show displays proper local IP, subnet, and default route (via router IP, e.g., 192.168.1.1 dev br0).

Ping to local IPs/hostname succeeds.

Ping to external IPs/domains times out from host.

Pi-hole Docker container (bridge mode) has full internet access (can resolve domains).

Can access Unraid GUI locally via IP.

No firewall/VPN active; Docker/VMs tested disabled.

Network Setup:

Router: Ubiquiti Dream Router 7 (UDR7), latest firmware.

Unraid Network: br0 bridge, DHCP (also tried static).

No VLANs, bonding, or custom routing initially.

Tried: Reboot server/router, reset network settings, manual route add (ip route add default via [ROUTER_IP] dev br0 - temporary?).

You are likely to get better informed feedback if you attach your system’s diagnostics (with everything in the one zip file) to your next post in this thread. It is always a good idea when asking questions to supply your diagnostics so we can see details of your system, how you have things configured, and the current syslog.

You are likely to get better informed feedback if you attach your system’s diagnostics (with everything in the one zip file) to your next post in this thread. It is always a good idea when asking questions to supply your diagnostics so we can see details of your system, how you have things configured, and the current syslog.

I forgot to add the attachment. Diagnostics attached.

tower-diagnostics-20251214-2203.zip

That looks like an external issue, set the DNS servers to Google ones or 208.67.222.222 and 208.67.220.220, then connect the server directly to the router, bypassing Pihole, and retest.

13 minutes ago, JorgeB said:

That looks like an external issue, set the DNS servers to Google ones or 208.67.222.222 and 208.67.220.220, then connect the server directly to the router, bypassing Pihole, and retest.

I tried, same thing

5 minutes ago, zdyszanytester said:

I tried, same thing

It might be worth disabling bonding and see if that makes a difference? Also Jumbo frames if you have them enabled on your network - they often cause problems.

39 minutes ago, zdyszanytester said:

I tried, same thing

Is that connected directly to the router? If so, boot with a new flash drive using a stock install and all default settings, no key needed, and check for connectivity. If it's the same, it basically confirms an external issue.

4 minutes ago, itimpi said:

It might be worth disabling bonding and see if that makes a difference? Also Jumbo frames if you have them enabled on your network - they often cause problems.

I tried, but nothing changed.

As usual, the user is the biggest enemy of devices. I created a lot of firewall rules and got lost in them. My mistake, I deleted one entry and the problem was solved, the internet is working again. Thank you all for your help and sorry for the trouble.