I am using two routers, one for connecting through VPN, and the other for internal network. My issue is after I connect via VPN, I can't access the internal network in other router. Here's my setup:
DrayTek Vigor 2832n
Used to connect to outside network via ADSL, and also used to connect to my network via VPN.
Firmware: 3.9.1 (latest)
Router IP (LAN1): 192.168.0.1
Subnet (LAN1): 255.255.255.0/24
Bind IP (LAN1): 192.168.0.5 (for the other internal router)
DHCP (LAN1): enabled starting at 192.168.0.2
Static route (LAN1): no rules
VPN IP (LAN1): static at 192.168.0.4
Takes an ethernet connection from DrayTek router, where it is input in the WAN port.
Firmware: dd-wrt v24-sp2 (latest)
WAN IP: 192.168.0.5
Router IP: 192.168.1.1
DHCP enabled starting at 192.168.1.100
I have several laptops connected to the TP Link router, where IPs are in the range of 192.168.1.x and through any of then, I can access the router webpages for both TPLink and DrayTek routers.
In addition, I can successfully VPN to my site from outside, where I can open the DrayTek router webpage. However in doing this, I am neither able to open the TPLink webpage, nor open any PC connected at the internal 192.168.1.x network.
Here's the ping status in this scenario:
192.168.0.1 (DrayTek: Success)
192.168.0.5 (TPLink WAN: Success)
192.168.1.1 (TPLink IP: Fail)
192.168.1.100 (PC on TPLink network: Fail)
Here's what trace route shows:
192.168.0.5: 192.168.0.1 to 192.168.0.5
192.168.1.1: 192.168.0.1 to 18.104.22.168xx to 22.214.171.124x (no idea what these IPs are)
I thought its an issue related to the need for a static route in DrayTek router, but when I create one I get "Status: Invalid". Here are my settings:
Destination IP: 192.168.0.5
Subnet Mask: 255.255.255.0/24
Gateway IP: 192.168.0.1
Network Interface: LAN1
Hence, I am not sure what is wrong with these settings.
Also, I originally only had DrayTek router by itself, but weirdly enough, clients kept disconnecting ethernet connections every once and a while, which was causing issues in my network. I never figured out the reason, and since I need VPN access, I put this setup together.