Problem OpenVPN in PPTP tunnel

[latex 0]

Hi everybody!

I'm new here, thanks for the service and thanks in advance for your help 

I live in a student dorm and they gave us an internet connection working through a VPN using PPTP dual access.

I'd live to connect to an AirVPN server so that they can't see my traffic. But it is not working! I just payed a trial of 3 days and using it through a wifi hotspot of my smarthphone it works, while being in the offered network it doesn't.

 

The error it gives me is this one:

RTNETLINK answers: No such device

ERROR: Linux route add command failed: external program exited with error status: 2

and then it stays there..

 

Ask me if you need some logs or what else! 

Thank you 

 

[latex 0]

Something that could be useful 

[LZ1 672]

Hello!

 

AirVPN doesn't use PPTP, only OpenVPN, so that may be the issue .

 

Sent to you from me with datalove

[NaDre 157]

Hi everybody!

I'm new here, thanks for the service and thanks in advance for your help 

I live in a student dorm and they gave us an internet connection working through a VPN using PPTP dual access.

I'd live to connect to an AirVPN server so that they can't see my traffic. But it is not working! I just payed a trial of 3 days and using it through a wifi hotspot of my smarthphone it works, while being in the offered network it doesn't.

 

The error it gives me is this one:

and then it stays there..

RTNETLINK answers: No such device

ERROR: Linux route add command failed: external program exited with error status: 2

 

Ask me if you need some logs or what else! 

Thank you 

 

This is probably much like running an OpenVPN connection over another OpenVPN connection. This comes up here from time to time. So this may help:

 

https://airvpn.org/topic/11277-its-possible-connect-two-vpn-at-the-same-time/?p=16345

https://airvpn.org/topic/15854-airvpn-must-offer-multi-hop-double-vpn-and-tor-overvpn-in-openvpn-config/?p=42417

 

If you are familiar with virtual machines (e.g. Linux under VirtualBox), that is what some others here do in order to nest VPN connections.

 

If you want to do this without separate machines (physical or virtual), then you have to manage your routing table yourself, rather than using OpenVPN's default set up. If that is what you want to do, then what is in your routing table with your PPTP connection running?

[latex 0]

Yes NaDre you perfectly got the point!

I wanna create this OpenVPN tunnel over the PPTP one without creating a virtual machine. This is the routing table I have being in the PPTP tunnel. Thanks if you can help me 

 

Anyway soon I'll set up the PPTP (first tunnel) in a router, will it remove the problem being the router a different machine? then my pc will have an "easy" routing table and the default OpenVPN will work. Or not?

[NaDre 157]

That routing table is quite unusual. Particularly the fact that the gateway address for the ppp0 interface is left as 0.0.0.0.

This suggests that the actual gateway address is available from another source. And all addresses in the 10.0.0.0/8 private range. So I guess with the PPTP connection down you only have access to your school's (or dorm's) LAN?

 

Perhaps at this point you should check that the link will come up OK if the routing table is left untouched. If that works, then we can see what needs to be done with routing later. In order to start the OpenVPN connection while keeping OpenVPN from trying to make routing table changes, you can add this to the OpenVPN config file:

route-nopull
redirect-private

UPDATE: I realized later that you should leave out the "redirect-private" too.

 

You are using Linux of some form, right? Then if the OpenVPN connection comes up with that change, more information than what is shown by "route -n" might be helpful. So please also do:

ip rule show
ip route show table all
/sbin/ifconfig