Windows - TAP-Windows Adapter just as virtual adapter

layer8

Hello!

I am looking for a way to install on a Windows machine a virtual adapter which uses the present physical adapter like this:

Phys. Adapter 10.10.11.1; Mask ...; GW ...; Mac Address ...
Virt. Adpater 192.168.1.1; Mask ...; GW ...; Mac Address ...

The Virtual Adapter uses the same physical network as the Phys. Adapter but has it's own IP, Mask, GW and so on.

Is this possible with the TAP-Windows Adapter?

(In this case no VPN functionality is needed.)

I installed it on W7 and read this article: http://openvpn.net/index.php/open-source/documentation/miscellaneous/76-ethernet-bridging.html. But it seems not to affect what I am looking for.

Thanks in advance!

Traffic

Yes you can .. set your IP address manually and then go to properties -> configure -> advanced -> media state: always connected.

layer8

Thanks. I tried it before but it doesn't work. Neither the manually assigned address work, nor it gets one by DHCP. (But the IP stack seems to work, arp -a shows the basic entries)

Isn't there the configuration missing what physical adapter the TAP-Windows Adapter should use?

I am testing on Window 7, vritualized under VMWare Workstation with TAP-Windows-Adapter-V9 from the recent installer: "openvpn-install-2.3.6-I601-x86_64".

layer8

This work, but it doesn't use the physical adapter. It behaves just as a kind of a loopback adapter.

>> The Virtual Adapter uses the same physical network as the Phys. Adapter ...

I need the functionality, that the virtual adapter "occupies" the physical adapter, but with it's own IP, MAC and so on. (Like the bridged adapter functionality in VMWare but without the need to install a guest OS).

I need that for testing software behaviour on multi homed clients.

Traffic

It works fine for me ?

PC1:
eth0: 10.1.101.101
tun0: 10.38.111.101

PC2:
eth0: 10.1.101.76:

root@deb-760:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 08:00:27:09:f4:e0
          inet addr:10.1.101.76  Bcast:10.1.101.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3047 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3128 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:282202 (275.5 KiB)  TX bytes:355323 (346.9 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

tun0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:10.101.103.76  P-t-P:10.101.103.76  Mask:255.255.255.0
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:336 (336.0 B)  TX bytes:336 (336.0 B)

root@deb-760:~# ping 10.1.101.101 -c 3
PING 10.1.101.101 (10.1.101.101) 56(84) bytes of data.
64 bytes from 10.1.101.101: icmp_req=1 ttl=128 time=0.694 ms
64 bytes from 10.1.101.101: icmp_req=2 ttl=128 time=1.05 ms
64 bytes from 10.1.101.101: icmp_req=3 ttl=128 time=1.11 ms

--- 10.1.101.101 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2008ms
rtt min/avg/max/mdev = 0.694/0.952/1.111/0.185 ms
root@deb-760:~# ping 10.38.111.101 -c 3
PING 10.38.111.101 (10.38.111.101) 56(84) bytes of data.
64 bytes from 10.38.111.101: icmp_req=1 ttl=128 time=1.55 ms
64 bytes from 10.38.111.101: icmp_req=2 ttl=128 time=0.881 ms
64 bytes from 10.38.111.101: icmp_req=3 ttl=128 time=1.05 ms

--- 10.38.111.101 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2006ms
rtt min/avg/max/mdev = 0.881/1.162/1.552/0.285 ms
root@deb-760:~# :D