My existing home network setup is as follows;

* Virgin Media Superhub 2 in modem only mode
* ASUS RT-N13U working as a switch / wireless AP running DD-WRT firmware version `DD-WRT v24-sp2 (08/07/10) std`
* Port forwarding on ASUS for RDP (`3389` for what its worth)
* DDNS with [NOIP](http://www.noip.com/)
* [PIA](https://www.privateinternetaccess.com/) Anonymous VPN Service - **using client software on Windows 7 PC & Android mobile device - no VPN config on switch / router**

Regardless of whether I am connected to the VPN, if my Windows PC is switched on, I can RDP into it remotely (not on the LAN) from pretty much anywhere - have tested on multiple devices from multiple locations. This works using either my WAN IP or my DDNS hostname.

My problem is that I cannot access the remote admin page of my switch and I'm pretty sure it's something to do with my VPN. I have listed the example scenarios I have tried below;

> 
> **Scenario 1:** The PC is switched on - connected to the VPN   
> 
> **Result 1:** Cannot remotely access switch
> 
> 
> **Scenario 2:** The PC is switched off - was connected to the VPN when last shut down   
> 
> **Result:** Cannot remotely access switch
> 
> 
> **Scenario 3:** The PC is switched on - not connected to VPN   
> 
> **Result 3:** Can remotely access switch
> 
> 
> **Scenario 4:** The PC is switched off - was not connected to VPN when last shut down   
> 
> **Result 4:** Can remotely access switch
> 
> 
> 

As with my RDP tests, I have tried all of the above 4 scenarios using both my WAN IP and my DDNS hostname from various devices in various locations.

There are two things which are confusing the hell outta me here; 

Firstly why is the VPN apparently the issue here when it is controlled by software on a PC which may be on or off when trying to remotely access? I could understand if the VPN was configured on the switch / router but it isn't.

Secondly, how is RDP getting through every time without fail and remote switch / router access is failing every time without fail?

I have attached a few (hopefully) useful screenshots of the DD-WRT config, if any more details are required let me know in the comments and I will edit as necessary.

[![enter image description here](https://i.stack.imgur.com/DZwpZ.jpg)](https://i.stack.imgur.com/DZwpZ.jpg)

[![enter image description here](https://i.stack.imgur.com/vnrdH.jpg)](https://i.stack.imgur.com/vnrdH.jpg)