Can't connect to router web interface

[WiredG]

Don't know if this is the right place to post this but:

 

I live in a place where internet is provided by two Ethernet wall plugs. We are allowed to connect our own router for wifi and whatnot. Problem is after connecting the router to the plug in the wall I can no longer access my routers configuration and the configuration of my router seems to have changed. I can factory reset my router and turn it on without it being plugged into the wall and I can easily access it. So I tried changing the routers settings page ip. But I after plugging it back into the wall, I can't access it. I don't really know what to do, or what's happening except a guess to some autoconfiguration being provided by the router my router is connected to? 

 

Update: I had the router only connected to my pc, I changed the ssid and the default gateway disappeared and I couldn't access the web interface 

[Electronics Wizardy]

Are you plugging the wan or lan port into the wan? You should be connecting the wan port to the wall.

 

Is your computer plugged into the lan port? Is everything setup on DHCP?

[WiredG]

Just now, Electronics Wizardy said:

Are you plugging the wan or lan port into the wan? You should be connecting the wan port to the wall.

 

Is your computer plugged into the lan port? Is everything setup on DHCP?

There isn't a separated wan port on my router. It is technically also a modem, meant to use coax. It is plugged into port nr. 1. 

The internet was working fine.

DHCP is being used, but not handled by my router, the owners of my flats router handles it all. Everything is connected by lan

[Electronics Wizardy]

1 minute ago, WiredG said:

There isn't a separated wan port on my router. It is technically also a modem, meant to use coax. It is plugged into port nr. 1. 

The internet was working fine.

DHCP is being used, but not handled by my router, the owners of my flats router handles it all. Everything is connected by lan

Id get a rotuer with a seperate wan port. THey might be only allowing one mac address per port.

 

 

[WiredG]

1 minute ago, Electronics Wizardy said:

Id get a rotuer with a seperate wan port. THey might be only allowing one mac address per port.

 

 

Pretty sure that isn't the problem, this is not the first time I am using this specific router in this way. The other time I did it I was the one owning both routers

[Electronics Wizardy]

Just now, WiredG said:

Pretty sure that isn't the problem, this is not the first time I am using this specific router in this way. The other time I did it I was the one owning both routers

DO you know what their network setup is? They can block these type of setups. Have you asks the network provider?

 

What are the subnets, are they setup the same?

[WiredG]

3 minutes ago, Electronics Wizardy said:

DO you know what their network setup is? They can block these type of setups. Have you asks the network provider?

 

What are the subnets, are they setup the same?

Not exactly. But they allow a decent amount of freedom, like 5 ip adresses you can use for portforwarding. And they say we should setup our own routers if we can and tell us to turn off our DHCP handler. I wouldn't be able to do that without being able to access my own routers settings page. And that's the problem

Edited May 17, 2021 by WiredG

[Electronics Wizardy]

1 minute ago, WiredG said:

Not exactly. But they allow a decent amount of freedom, like 5 ip adresses you can use for portforwarding. And they say we should setup our own routers if we can and tell us to turn off our DHCP handler 

Did you contact their support for help? What did they say? They know way more about their network than anyone here does.

[WiredG]

26 minutes ago, Electronics Wizardy said:

Did you contact their support for help? What did they say? They know way more about their network than anyone here does.

They don't really have support exactly, but I'll try anyway

[Falcon1986]

13 hours ago, WiredG said:

There isn't a separated wan port on my router. It is technically also a modem, meant to use coax. It is plugged into port nr. 1. 

The internet was working fine.

DHCP is being used, but not handled by my router, the owners of my flats router handles it all. Everything is connected by lan

This sounds like you’re trying to repurpose a cable gateway to be used as a router. Gateways are designed to take a WAN connection (in this case a coaxial cable) and bridge that to the LAN with its own DHCP server. I don’t think the device “knows” what to do when you go plugging one of its LAN ports into your apartment’s ethernet-supplied internet. If this were the case, then any router could be used for multi-WAN setups.

 

Even if you turn off the DHCP server on the gateway, it doesn’t necessarily change its operation mode of how ports are configured/bridged.

 

In my opinion you’re taking the difficult approach to this. I understand that you probably want to use equipment that you already have, but using a proper router (not a gateway) is likely to be less of a hassle to set up and, when it comes to troubleshooting problems in the future, things won’t be as complicated.

 

I hope your ISP is able to help you out with this.

[Alex Atkin UK]

Honestly it sounds like what they are describing is using a router as a switch and WiFi Access Point.  It used to be enough to just turn off DHCP but I wouldn't recommend that these days as routers can still end up broadcasting other traffic onto the network such as uPNP so that clients auto-detect that router on the network.  This can end up breaking certain functionality on the main router.

So if you want to use a router as an Access Point, best to find one that has a dedicated mode for that.  Although the best solution overall is to have a separate switch and a proper Access Point.