how can I set my primary vodafone router to allow connection to a secondary VPN router

[asturchisum]

I would like to access a private VPN service from a secondary router. I got the secondary router configured but it is not capable to establish the private connection. I believe I might require to configure primary vodafone router to allow it (i.e.  passthrough). I have not been able to findout setups in the vodafone router or tutorials about how to do it. HELP

[asturchisum]

Just in case it helps the way I am trying to set the VPN router is establishing a VPN client using OpenVPN in combination ctp/udp files 

[Anonymous]

The setup that you are looking for does not exist.  You might be able to find a working example by searching for "double NAT and vpn".

There are ways it may be possible, but not optimally!

[asturchisum]

I hear what you are saying but I believe that bring us to the same point, how/where do I find vodafone primary router setups to allow a pass through / router bridge

[Cynric]

.@asturchisum  This is very basic, but perhaps it may help.

On Vodafone THG3000

Internet -> Firewall
Allow Ping to WAN interface : OFF
Firewall : ON

Internet -> DNS & DDNS

DNS Configuration "Manually"
Domain Name Server (DNS) Address : 192.168.0.x (or whatever you local DNS may be)
Secondary DNS Address (optional) : 1.0.0.1 (I use an external here as safety net if the other hardware fails)
DDNS : OFF

Wi-Fi -> General

Wi-Fi Network : OFF
Enable Wi-Fi On/Off button on Vodafone Wi-Fi Hub : OFF

Settings -> Public Subnet

Enable : OFF

Settings -> Local Network
IPv4 Address ofVodafone Wi-Fi Hub : 192.168.1.1
DHCPv4 Server : OFF
IPv6 : OFF

IPv4 Address ofVodafone Wi-Fi Hub : 192.168.5.1
DHCPv4 Server : OFF
IPv6 : OFF

On secondary router/switch

Tell it not to require a login to the ISP (THG3000 does this for you)

Internet: Use STATIC address
IP Address : 192.168.1.2 (this is the address of this device)
IP Subnet Mask : 255.255.255.0
Gateway IP Address : 192.168.1.1 (the address of the THG3000 box)

Domain Name Server (DNS) Address : Manually set
Primary DNS : 192.168.0.2 (this can be the IP of the secondary box, I have a separate DNS provider on my LAN)
Secondary DNS : 1.0.0.1
Third DNS : 1.1.1.1

Wi-Fi : Setup as best suits your requirements

[asturchisum]

Hi Cynric,

I have tried your setup in my vodafone huawei router hhg 2500 and it has just dissabled internet in the vodafone router in the middle of the process. Now, I have lost Wifi in the vodafone primary network what it was never the intention. I had created a backup router config file but I do not seem to have access to the vodafone router neither with ethernet lan cable and 192.168.1.1... HELP first to restore vodafone router config

[asturchisum]

Hi, I have been able to solve vodafone internet by pressing router reset. Now back to main topic. I want to keep 2 roters to provide be able to connect to primary vodafone router as normal and then create a secondary VPN router.

Cynric your previously suggested setups seems to dissable the vodafone router wifi... 

[Cynric]

Disable Wi-Fi, yes that is what I do on my LAN because the 2nd device provides the Wi-Fi rather than the THG3000. I am glad to hear that you were not totally stuck.

[asturchisum]

That is not exactly what I was looking for.

1- I would like to have the two routers, vodafone router to connect to work servers and asus VPN router for private activities. Would that be possible?

2-chatting with Nord people they are asking me to config Settings / IPv4 /DHCP server enabled /Address Pool Start IP and End IP... but these fields are greyout. Any thoughts about how to edit these IPs?

[Jayach]

It sounds like you have the second router configured as an AP (access point). It would need to be working as a router IF you are to get it working.

What router are you using?