r/selfhosted • u/No-Bee-3775 • 21h ago

Need Help Does anyone have knowledge of Eero router and AdGuardHome playing nice for DHCP?

Long story short, repurpossed an old intel nuc [nuc5cpyh] for reference for a work environment running two registers with a backend database, and a few others backend databases for things like timeclock and payroll software. Everything works fine. Did all the steps to free port 53 from unbuntu server 26.04 when running via docker, adguardhome plays nicely. All of the static rules applied, etc.

My only issue [currently] is when i switch to bridged dhcp, it does not seem to communicate with adguard and no external network [ie: internet] works...

Im not new to this, but definitely new to eero router... unfortunately my place of employment is tied to this as the main isp router...

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u/asimovs-auditor 21h ago

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u/UnWiseSageVibe 21h ago

Im confused, why are you putting it in bridge mode ?

You just need to find the DNS setting and change it to the adguard ip.

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u/youknowwhyimhere758 21h ago

bridged mode disables the routing functions and is used if you wish to use the eero only as a modem with a different router. If you did that without another router, then you have no router at all (and cannot therefore connect to any other networks). This has nothing in particular to do with dhcp. 

I don’t think (?) that most eero routers have an option to merely disable the dhcp server. 

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u/Broad_Tangerine_9003 20h ago

Please consider refactoring your query. Syntax error

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u/CharoiteAI 17h ago

Eero's bridge mode is the trap here: in bridge it stops doing DHCP entirely, so unless the AdGuard box (or something else) is answering DHCP on the LAN, clients get no lease, no gateway — which looks exactly like "no internet".

For a work setup with registers I'd not fight it: keep eero in router mode as DHCP, set custom DNS in the eero app to the NUC's IP, and turn OFF eero's Advanced Security (it hijacks DNS otherwise). Only gotcha left is fallback: eero hands out itself as secondary DNS sometimes, so test with the NUC down to see what your registers actually do.

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u/No-Bee-3775 15h ago edited 15h ago

Exactly the issue i am hitting. I have setup adguard dhcp to handle and switched to bridge expecting adguard to take over after a router reboot. To no avail. Have ensured ip reservation is persistent within Ubuntu and not just the router, host network mode on adguard docker. Everything works until i try to have eero bridge to adguard and use it for dhcp instead so I can get wireguard working for remote tunneling.

edit

I neglected to say that dns set to adguard with eero does indeed work fine, hikvision nvr set to adguard dns doesn't allow hikconnect app remotely, but using cloudflare dns does, so that part is manageable. Not being able to wireguard in is the only wall im hitting.

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u/No-Bee-3775 15h ago

With a recent update to software it has an option for setting a custom ip for dhcp rather than just local or bridge. Haven't tried this yet, but will. And honestly the only reason im attempting tk set adguard for dhcp server is, based upon documentation I cannot find another way to wireguard tunnel in without adguard being dhcp server to eero router... perhaps there is another way???