UPnP over openVPN, is it possible?

esumit

Is there any update on this Issue :

I have tried several ways around to make it work, but it deosn't , below is little detailed related to almost the same issue which is still under discussion ?

Problem : Over OPENVPN - Forwarding of UPnP SSDP Multicast Packets from One Network to Another e.g. Why Its not possible to forward multicast packets from one subnet to another network over openvpn ?

Network Configuration :

(PC-A-Network-A - 192.168.60.X) --Switch(Router) -- Internet (ISP) -- Switch (Router) -- (PC-B-Network-B - 192.168.10.X)

What is happening ?

libupnp device is running at PC-A-Network-A(192.168.60.128) and sending multicast packets(SSDP-Notify) at 239.255.255.250:1900

libupnp ctrlpoint is running at PC-B Network-B(192.168.10.104) and sending multicast packets(SSDP-Msearch) at 239.255.255.250:1900

OpenVPN Server is running at PC-B Network-B

OpenVPN Client is running at PC-A Network-A

(open VPN fully configured, as both network can ping each other)

Via using smcroute ( from this : http://bda.ath.cx/blog/2009/01/24/multicast-routing-upnp-traffic-with-linux/), its possible to route PC-A-Network Packets to Network-B (SSDP-Multicast Packets), and vice versa.

What is not happening ?

PC-A sending multicast SSDP Packets , and those are forwarded via openVPN to Network -B and vice versa, but no one accepts the multicast packets received from another network ?

Is there any body can explain ?

Do I need to configure iptables rules so that packet should be forwarded ? Or required to add some NAT rules or Is it possible to do this scenario ?

Concept Discussion :

On this network :

(PC-A-Network-A - 192.168.60.X) --Switch(Router) -- Internet (ISP) -- Switch (Router) -- (PC-B-Network-B - 192.168.10.X)
Why Its not possible to forward multicast packets from one subnet to another over openvpn ?

krzee

i made this a new topic for you
you are only bridging in 1 lan, you need to bridge on the client as well

esumit

Earlier I followed the proper instruction with additional help from all around internet, and then openvpn with tun was set up and worked well.

Since last Two Days I am working on TAP Mode, I am following what exactly mentioned in the openvpn.net e.g. Using Bridge-Start, Bridge-Stop etc.

My network configuration is like this :

[Network Configuration]

[Server Installed]
[Ubuntu - eth0: 192.168.10.104] -[192.168.10.1]-Switch-[Public-IP:A.A.A.A]
^
|Internet
|Internet
V
[Client Installed]
[Ubuntu - eth0: 192.168.60.128] -[192.168.60.1]-Switch-[Public-IP:B.B.B.B]

---------------------------------------------------------------------------------------------------------------------

[1].May you please provide me appropriate configurtaion so that - Server and Client can talk to each other , means they can ping each other.

Its again very confusing while configuring e.g;

[Question]--
If my local IP(Server side) is : 192.168.10.104, then server should run on this ? Or My machine must have Two interfaces
So one talk with - OpenVPN Server and another talk with Internet ? What Exactly ?

When I follow the way it defined here : http://openvpn.net/index.php/open-source/documentation/miscellaneous/76-ethernet-bridging.html

[Question]--

It does create the tap0 - but it doesn't associated with any ip address

It created bridge interface , but it has the same IP Address as with eth0 interface, and network access got blocked.

What does this Server-Bridge means ? - means Server is bridging to what ? Bridging to its Local IP Address ?

Is there any body can provide his comments based on the Network Configuration as defined above.

esumit

This scenario more to forward SSDP Multicasting packets from One subnet to another subnet over OpenVPN:

Network Configuration is like this :

[Server Installed]
[Ubuntu - eth0: 192.168.10.104] -[192.168.10.1]-Switch-[Public-IP:A.A.A.A]
^
|Internet
|Internet
V
[Client Installed]
[Ubuntu - eth0: 192.168.60.128] -[192.168.60.1]-Switch-[Public-IP:B.B.B.B]

---------------------------------------------------------------------------------------------------------------------

Even I can see the packet on different network, but nothing is happening, So I just thought to ask :

[1].How TUN Adapter deals with Multicast packets which it got received, Does it just drop to user space ? Or After decryption it forward to the network ?

[2] In actual steps - What TUN Adapter does ? - Its just receive the packet from OEPNVPN tunnel, it captured at TUN Interface and those get decrypted by OpeNVN Client or Server, then what exactly happens ?

[3] Is client and server handles these packets differently ? Or Same way ?