Trying to allow google wifi clients to see DD-WRT Router

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muchgooder
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Joined: 23 Nov 2012
Posts: 9

PostPosted: Sun Jul 25, 2021 13:28    Post subject: Trying to allow google wifi clients to see DD-WRT Router Reply with quote
I bought the google wifi system a couple of years ago so tht it would cover my large yard and 3 story house. I love its range but not its lack of advanced features. I know other products have more features but I can't justify spending hundreds of dollars on this right now.

I'd like to have the google wifi clients be able to access clients on my DDWRT network. I do not want to put either router into bridge mode. I did try putting the google wifi router first in my setup but it would not pass ports (many people had this problem).

So I have a DDWRT router (.1.1) connected to my ISP modem. I have my google wifi (.2.1) connected to this network. I don't seem to have any double nat issues as I am able to pass ports through to DDWRT. Anyway, is there a way to allow clients on wifi to access clients on DDWRT? I've seen guides mention static routes: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=323948 - would the last entry in that thread do the trick? I don't have a ton of knowledge in this area. Thank you so much for your time!
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egc
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Joined: 18 Mar 2014
Posts: 8134
Location: Netherlands

PostPosted: Sun Jul 25, 2021 13:35    Post subject: Reply with quote
What build, which router?

To get the best out of DDWRT and the forum read the forum guidelines with helpful pointers:
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087

_________________
Routers:Netgear R7800, R6400v1, R6400v2, Linksys EA8500, EA6900 (XvortexCFE), E2000 (converted WRT320N), WRT54GS v1.
WireGuard Documents & Guides:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327397
OpenVPN Documents & Guides: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327398
IPSET: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327261
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
muchgooder
DD-WRT Novice


Joined: 23 Nov 2012
Posts: 9

PostPosted: Sun Jul 25, 2021 13:37    Post subject: Reply with quote
Sorry, I didn't include that as I thought this was a generic question.

Netgear WNDR4000
Firmware VersionDD-WRT v3.0-r42054 mega (01/21/20)
egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 8134
Location: Netherlands

PostPosted: Sun Jul 25, 2021 15:57    Post subject: Reply with quote
Your build is rather old and has already some security issues so you might want to consider upgrading (see the forum rules how, where. what Smile )

So your DDWRT router is connected to the internet and the Google router is connected with its WAN to the LAN of the DDWRT and each on its own subnet right?

I do not know Google's stuff but if possible connect LAN<>LAN so basically using google as a WAP:
https://wiki.dd-wrt.com/wiki/index.php/Wireless_Access_Point

Then you have one seamless network.

If that is not possible then leave it as it is you can have access from and to both networks but only when using the IP address of the clients.
So no network discovery for media servers etc.

Usually you should have access from downstream (i.e. Google) to upstream, so connected to your Google network you should be able to see the router at 192.168.1.1.

The other way around you have to disable the firewall of the Google router and set a static route on the DDWRT router to the Google router.
Attached my personal notes how to do that for two DDWRT routers but I hope you get the basic idea Smile

_________________
Routers:Netgear R7800, R6400v1, R6400v2, Linksys EA8500, EA6900 (XvortexCFE), E2000 (converted WRT320N), WRT54GS v1.
WireGuard Documents & Guides:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327397
OpenVPN Documents & Guides: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327398
IPSET: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327261
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
muchgooder
DD-WRT Novice


Joined: 23 Nov 2012
Posts: 9

PostPosted: Mon Jul 26, 2021 11:42    Post subject: Reply with quote
Thank you so much @egc!

A little more information - we are extremely limited in what we can do with google wifi. I can't even do something like disable dhcp.

So you are right - I can ping items on one network from the other one. Media discovery isn't a huge deal for me because most of my media is on the wired network and consumed on the same network. I don't know how far I want to go with this for little gain. I did some poking around to see if I can take it to the next step but I am not sure that I fully understood if they would work for me. Adding another router in front of both routers and let that be the master? I think at the end of the day I am limited with google wifi because it wants to be the only router and is limited in terms of functionality.
egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 8134
Location: Netherlands

PostPosted: Mon Jul 26, 2021 13:45    Post subject: Reply with quote
To get access from the upstream (DDWRT) network to Googles subnet see the attached document.

Setting the static route on the DDWRT router is easy, but you also have to disable the firewall on the Google stuff or at least allow access with iptables as described.

P.S. I would expect that googles router also should be able to work as WAP so on the same subnet attached LAN<>LAN

_________________
Routers:Netgear R7800, R6400v1, R6400v2, Linksys EA8500, EA6900 (XvortexCFE), E2000 (converted WRT320N), WRT54GS v1.
WireGuard Documents & Guides:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327397
OpenVPN Documents & Guides: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327398
IPSET: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327261
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
muchgooder
DD-WRT Novice


Joined: 23 Nov 2012
Posts: 9

PostPosted: Mon Jul 26, 2021 14:08    Post subject: Reply with quote
egc wrote:
To get access from the upstream (DDWRT) network to Googles subnet see the attached document.

Setting the static route on the DDWRT router is easy, but you also have to disable the firewall on the Google stuff or at least allow access with iptables as described.

P.S. I would expect that googles router also should be able to work as WAP so on the same subnet attached LAN<>LAN


Thanks again! I meant to ask you - to which link are you referring?

I don't have the option to disable the google firewall or do any kind of advanced routing. I can turn it off and make it just an access point but I'd lose the mesh capability. Would this be an issue?
egc
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Joined: 18 Mar 2014
Posts: 8134
Location: Netherlands

PostPosted: Mon Jul 26, 2021 14:16    Post subject: Reply with quote
On my second post I attached a document which you should be able to see if you are logged in.

I would indeed just use googles router as access point (that is what I was referring to as a WAP (=Wireless Access Point)

_________________
Routers:Netgear R7800, R6400v1, R6400v2, Linksys EA8500, EA6900 (XvortexCFE), E2000 (converted WRT320N), WRT54GS v1.
WireGuard Documents & Guides:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327397
OpenVPN Documents & Guides: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327398
IPSET: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327261
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
muchgooder
DD-WRT Novice


Joined: 23 Nov 2012
Posts: 9

PostPosted: Mon Jul 26, 2021 21:41    Post subject: Reply with quote
egc wrote:
On my second post I attached a document which you should be able to see if you are logged in.

I would indeed just use googles router as access point (that is what I was referring to as a WAP (=Wireless Access Point)


Thank you again!

In the instructions it says to change router 2 to be of type "router". I can't do this in google wifi (nor much of anything else).
egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 8134
Location: Netherlands

PostPosted: Tue Jul 27, 2021 5:55    Post subject: Reply with quote
The easiest way is just leave router 2 in gateway mode.
_________________
Routers:Netgear R7800, R6400v1, R6400v2, Linksys EA8500, EA6900 (XvortexCFE), E2000 (converted WRT320N), WRT54GS v1.
WireGuard Documents & Guides:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327397
OpenVPN Documents & Guides: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327398
IPSET: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327261
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
muchgooder
DD-WRT Novice


Joined: 23 Nov 2012
Posts: 9

PostPosted: Wed Jul 28, 2021 0:50    Post subject: Reply with quote
egc wrote:
The easiest way is just leave router 2 in gateway mode.


Sorry, I finally had a few minutes to fully consume this.

The problem I have is that I can't do hardly any of the items under "Router 2 Configuration". There is no place to add firewall rules in google router. Am I out of luck?
egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 8134
Location: Netherlands

PostPosted: Wed Jul 28, 2021 10:56    Post subject: Reply with quote
If you cannot do anything about the firewall of the google router then the only option you have is using it as a (W)AP
_________________
Routers:Netgear R7800, R6400v1, R6400v2, Linksys EA8500, EA6900 (XvortexCFE), E2000 (converted WRT320N), WRT54GS v1.
WireGuard Documents & Guides:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327397
OpenVPN Documents & Guides: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327398
IPSET: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327261
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
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