Help/tips needed: Establish subnet via landlord guest wifi++

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Woothie
DD-WRT Novice


Joined: 10 Apr 2021
Posts: 5

PostPosted: Fri Jun 11, 2021 14:32    Post subject: Help/tips needed: Establish subnet via landlord guest wifi++ Reply with quote
Hello! I'm in a bit of a predicament due to my somewhat unusual network situation, and would like to check in with you guys for tips and ideas on what to do.

I moved recently and no longer have full control over my internet access. We've been given admittedly great wifi coverage and bandwidth via the house owner's meshed guest wifi. The problem is that it does not have UPnP enabled and AP isolation is enabled. This is a problem because we use in-house streaming to a Chromecast. I also use Moonlight to stream my desktop when not at home. I've been able to get around this for now by setting up my Linksys EA6350v2 as a repeater bridge or set it to client mode. I've also used ZeroTier to get around the issues with Moonlight port forwarding. Through the Linksys router I've connected a separate AP (a decommissioned Cisco WAP371) which provides our apartment with wifi I mostly control. However there are still shortcomings I'd like to get around, hence why I'm here.

I'm willing to try pretty much anything at this point. My goal is to get around the main router upstairs and have my DD-wrt router do all the NAT and whatnot. My bandwidth is about 300/300 direct from the guest wifi, but for whatever reason it's more than halved via the AP and upstream bandwidth at my computer connected by cable is relatively speaking abysmal (20-30) according to speedtest. This is the case both in repeater bridge and client mode. Those last two things I can live with, but I need to be able to control the traffic flow.

My current setup has my Linksys EA6350v2 (DD-WRT v3.0 r46316 04/09/21, flashed using this method) act as a client to the guest wifi upstairs (client mode, used this tutorial). I have a Cisco WAP371 connected via cable to the Linksys router which provides WiFi to all the client devices in our apartment. In total we have about 6-8 devices which regularly access the internet through the Cisco AP. I also have a desktop connected to the Linksys router via cable, which provides a Plex media server and Moonlight desktop streaming server for both local and remote streaming. All local streaming works fine as is, while remote is finicky at best. Plex is only able to stream to remote clients via their relay at limited bandwidth, and Moonlight only works remotely if I set up ZeroTier on both ends. I've also had the Linksys set up in repeater bridge mode and it worked fine, pretty much identical to client mode with the same shortcomings.

Please let me know if you'd like me to further clarify anything about my setup. Thanks for reading!

EDIT: Wrong link for the method I used to flash my router, sorry about that! Updated the link above to redirect to the correct method now. I used a slightly modified method, detailed here: link.

_________________
Routers:
Linksys EA6350v2 - dd-wrt r51506 (Client/Station mode), how-to flash
Ubiquiti UniFi U6 LR - Stock (active AP)
TP-Link Archer C2 v1 - OpenWRT (gathering dust)
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egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 12837
Location: Netherlands

PostPosted: Sat Jun 12, 2021 7:50    Post subject: Reply with quote
To have full control Client mode is the way to go:
https://wiki.dd-wrt.com/wiki/index.php/Client_Mode
Use the fastest connection which is usually the 5 GHz radio to connect to your landlord, the other 2.4 GHz you can use for your own wifi.

For the Cisco WAP:
https://wiki.dd-wrt.com/wiki/index.php/Wireless_Access_Point

You then have one subnet of your own.

_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: 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
Woothie
DD-WRT Novice


Joined: 10 Apr 2021
Posts: 5

PostPosted: Sat Jun 12, 2021 11:20    Post subject: Reply with quote
egc wrote:
To have full control Client mode is the way to go:
https://wiki.dd-wrt.com/wiki/index.php/Client_Mode
Use the fastest connection which is usually the 5 GHz radio to connect to your landlord, the other 2.4 GHz you can use for your own wifi.

For the Cisco WAP:
https://wiki.dd-wrt.com/wiki/index.php/Wireless_Access_Point

You then have one subnet of your own.


Hello and thanks for the reply! But that's not really what I was asking. I do have a subnet set up, the problem is I do not control the NAT going out into WAN. I.e. if I enable UPnP on my router and/or port forward something, from the outside it doesn't change anything. Obviously this is because I don't control the router that is actually pointed out into the Internet, instead I end up in a double NAT situation. While that in and of itself isn't a big deal, it is a problem because the ports I open aren't actually open.

I was hoping for tips on how to get around this, and if anyone has had similar issues and found solutions. A Wireguard/OpenVPN tunnel would probably solve it, but I'd like to double check here if there's another solution that fits me better that I don't know about. Or perhaps if I should avoid it for whatever reason.

I'm sorry if the title was misleading, I couldn't really think of a good way to summarize everything into the title and draw in attention Razz

_________________
Routers:
Linksys EA6350v2 - dd-wrt r51506 (Client/Station mode), how-to flash
Ubiquiti UniFi U6 LR - Stock (active AP)
TP-Link Archer C2 v1 - OpenWRT (gathering dust)
egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 12837
Location: Netherlands

PostPosted: Sat Jun 12, 2021 11:41    Post subject: Reply with quote
You cannot port forward as you cannot control the the landlords router and that is where the port forwards should be set in the first place.

You can use a VPN or WireGuard tunnel but only if the provider supports port forwarding, some VPN providers do that but you have to check carefully.

Of course you can setup your own VPN server in the cloud, that will work.

Alternatively use something like ngrok (done that in the past) or zerotier (never used it)
https://www.softwaretestinghelp.com/ngrok-alternatives/

_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: 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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