Why from a virtualized Ubuntu system I can't discover the ip address of my router?

Posted by AndreaNobili on Super User See other posts from Super User or by AndreaNobili
Published on 2014-05-28T22:22:32Z Indexed on 2014/05/29 3:33 UTC
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I am not into computer network and I have the following problem finding my router IP address.

I have a Windows 8 PC on on which it is installed VmWare Workstation that virtualizes Linux Ubuntu.

The network adapter settings of this Virtual Machine is setted as NAT.

Now my problem is that if in the Windows 8 DOS shell I perform the ifconfig statment I obtain

C:\Users\Andrea>ipconfig

Configurazione IP di Windows


Scheda Ethernet tap0:

   Stato supporto. . . . . . . . . . . . : Supporto disconnesso
   Suffisso DNS specifico per connessione: techub.lan

Scheda Ethernet Connessione di rete Bluetooth:

   Stato supporto. . . . . . . . . . . . : Supporto disconnesso
   Suffisso DNS specifico per connessione:

Scheda LAN wireless Connessione alla rete locale (LAN)* 11:

   Stato supporto. . . . . . . . . . . . : Supporto disconnesso
   Suffisso DNS specifico per connessione:

Scheda LAN wireless Wi-Fi:

   Suffisso DNS specifico per connessione: DSL2750B
   Indirizzo IPv6 locale rispetto al collegamento . : fe80::89ff:6d12:49cf:4354%13
   Indirizzo IPv4. . . . . . . . . . . . : 192.168.1.3
   Subnet mask . . . . . . . . . . . . . : 255.255.255.0
   Gateway predefinito . . . . . . . . . : 192.168.1.1

Scheda Ethernet Ethernet:

   Stato supporto. . . . . . . . . . . . : Supporto disconnesso
   Suffisso DNS specifico per connessione:

Scheda Ethernet VMware Network Adapter VMnet1:

   Suffisso DNS specifico per connessione:
   Indirizzo IPv6 locale rispetto al collegamento . : fe80::edb3:8352:f954:2b0c%23
   Indirizzo IPv4. . . . . . . . . . . . : 192.168.129.1
   Subnet mask . . . . . . . . . . . . . : 255.255.255.0
   Gateway predefinito . . . . . . . . . :

Scheda Ethernet VMware Network Adapter VMnet8:

   Suffisso DNS specifico per connessione:
   Indirizzo IPv6 locale rispetto al collegamento . : fe80::d00b:8c6e:98b:f1ec%24
   Indirizzo IPv4. . . . . . . . . . . . : 192.168.15.1
   Subnet mask . . . . . . . . . . . . . : 255.255.255.0
   Gateway predefinito . . . . . . . . . :

Scheda Tunnel Teredo Tunneling Pseudo-Interface:

   Stato supporto. . . . . . . . . . . . : Supporto disconnesso
   Suffisso DNS specifico per connessione:

Scheda Tunnel isatap.techub.lan:

   Stato supporto. . . . . . . . . . . . : Supporto disconnesso
   Suffisso DNS specifico per connessione: techub.lan

Scheda Tunnel isatap.{5B95051D-79AB-4147-92CF-3A2E16698432}:

   Stato supporto. . . . . . . . . . . . : Supporto disconnesso
   Suffisso DNS specifico per connessione:

Scheda Tunnel isatap.{340A5FAD-1597-402E-B658-29C37E8F7BC2}:

   Stato supporto. . . . . . . . . . . . : Supporto disconnesso
   Suffisso DNS specifico per connessione:

Scheda Tunnel isatap.DSL2750B:

   Suffisso DNS specifico per connessione: DSL2750B
   Indirizzo IPv6 locale rispetto al collegamento . : fe80::5efe:192.168.1.3%26
   Gateway predefinito . . . . . . . . . :

So, looking at the previous output it appear clear that the default gateway (my router) is: 192.168.1.1, infact if I open it into a browser it apear to me the login mask to enter in the router settings....

Ok, if now I open the virtualized Ubuntu shell and perform the route command I obtain this output:

andrea@andrea-virtual-machine:~$ route
Tabella di routing IP del kernel
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.15.2    0.0.0.0         UG    0      0        0 eth0
link-local      *               255.255.0.0     U     1000   0        0 eth0
192.168.15.0    *               255.255.255.0   U     1      0        0 eth0

So, here it say to me that the default gateway is 192.168.15.2 (that is not my router ip address), why?

My idea is that it could depend by the NAT. Because my Windows system is connected using the wireless but in the virtualized Ubuntu I see that I am connected to a "wired network".

So I think that the NAT virtualize a network adapter (or something like this) and that 192.168.15.2 could be the ip address of this network adapter...

But it seems strange to me because, as you can see in the previous ipconfig output the VmWare network adapter addresses are: 192.168.129.1 and 192.168.15.1.

So I have also 2 others doubts:

1) What device represents the 192.168.15.2 ip address that the virtualized Ubuntu see as Default gateway but that is not my router?

2) What exactly do the two VmWare network adapter that I have configured into my Windows 8 system?

There is a way to discover my router ip from the virtualized Ubuntu system ?

Tnx

Andrea

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