User cannot access shares of NAS with router between network

[Cybrex]

Hey, so i've setup my NAS with unraid now and can access shares and all is well.
Now i want someone else to be able to access the shares too but he cannot find/connect to them at all.

While i am connected to the main telekom router which is also connected to the NAS, the other person is connected to another router which THEN connects to our main telekom router.

I got the feeling thats the reason why it does not work for him to see the NAS.

Do you have any ideas how i can make it possible for him to access it?
I'm a noob when it comes to networked stuff so i'm probably just missing something.

Thanks in advance!

[Frank1940]

I think you need to provide the base addresses (it will be something like  192.168.1.0) of both routers.  There are rules that routers use to determine where they will 'look' to find a devices based on the IP address.  If the IP address of your server is with the base range of IP addresses serviced by your friend's router, it will never look beyond that router to find your server.  Thus he can never see your server!    (I am not a networking GURU!  I know just enough to make me really dangerous if I had your problem.  I don't know why your friend has his own router but the two routers on 'one' network is a receipt for problems...) 

[Cybrex]

Okay i've found the solution.

I had to disable DHCP on the second router and put the cable that connects both routers into a LAN port instead of the WAN port.
That way it just acts like a switch with Wlan functionality basically.

[rjdipcord]

4 hours ago, Cybrex said:

Okay i've found the solution.

I had to disable DHCP on the second router and put the cable that connects both routers into a LAN port instead of the WAN port.
That way it just acts like a switch with Wlan functionality basically.

Yes that makes sense. When traffic passes through the WAN port, it is also passing through a firewall. That firewall is designed to protect the devices behind it and allow only minimal traffic through. It has no way of knowing the traffic you're trying to pass is actually allowed, and will perform the default action - drop the packets. You should evaluate your network topology and make sure there are no unnecessary routing paths that could be redundant and causing issues.