Hey all,
I’m running AdGuard Home on my TrueNAS box for DNS, but recently all DNS lookups started failing. AdGuard reports upstream DNS servers (like 1.1.1.1 and DoH URLs) as unreachable.
TrueNAS has a default route via my gateway (192.168.2.1), but it can’t ping it — I get “Destination Host Unreachable.” The network interface (br0) is up with no errors.
What’s confusing is that local access still works fine — I can stream from Jellyfin and access SMB shares from other devices on my LAN. Even externally, through Netbird VPN, I was able to stream from Jellyfin. So TrueNAS is clearly reachable from inside and outside, but it seems like it can’t reach out — no internet, no access to the gateway.
I had previously moved the IP alias from the NIC to a bridge (br0) to use with Netbird. That setup worked for a while. I’ve now deleted the bridge and put the alias back on the NIC, but the issue persists.
DHCP is enabled on my router, and other LAN devices are working fine. I switched the global interface setting from br0 to automatic in TrueNAS as well.
AdGuard started acting weird when I pointed my router to it for DNS. I’ve since removed those settings and shut down AdGuard, but the problem remains. TrueNAS can’t fetch updates or connect to anything outside the LAN.
Feels like a routing issue or IP conflict, but I’m not sure what else to try. Any ideas?
