virtualbox.org

So, I'm having a networking issue which is unfamiliar to me. I've never really had networking issues back home, either on wired or wireless, home or work networks. I'm overseas at the moment however and have spent the last couple of hours trying to resolve this issue.

In my Ubuntu 12.04 LTS guest (Win7 Host), some things are able to see the internet fine... for example, Chrome can access the web just fine and the Update Manager works too. However, from a terminal, I can ping the my host machine by IP, I can ping the DNS by IP, but I can't ping anything else in the outside world!?!?

At the bottom of this message, I'm pasting the ipconfig for the host and ifconfig for the guest. As mentioned above I can ping both 10.21.12.{1,244}, the DNS and HOST IP addresses. For example:

farrell@MyVM:~$ ping 10.21.12.244
PING 10.21.12.244 (10.21.12.244) 56(84) bytes of data.
64 bytes from 10.21.12.244: icmp_req=1 ttl=128 time=2.41 ms
64 bytes from 10.21.12.244: icmp_req=2 ttl=128 time=1.66 ms
^C
--- 10.21.12.244 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1003ms
rtt min/avg/max/mdev = 1.660/2.038/2.417/0.381 ms

However, I can't ping google for example (the space in .c om isn't really there):

farrell@MyVm:~$ ping google.c om
PING google.c om (173.194.35.8 ) 56(84) bytes of data.
^C
--- google.c om ping statistics ---
6 packets transmitted, 0 received, 100% packet loss, time 5026ms

I've tried various things including running dhclient, but it seems like the dns server is set correctly.

farrell@MyVM:~$ sudo dhclient
RTNETLINK answers: File exists
farrell@MyVM:~$ cat /etc/resolv.conf 
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 10.21.12.1
nameserver 127.0.0.1
search cyberbox.it

Anyone have any ideas what could be wrong? I'm happy to provide any additional info that could be helpful.

Many Thanks!!
Ryan





From Window 7 x65 Host (subset of "ipconfig /all"):

Wireless LAN adapter Wireless Network Connection:

   Connection-specific DNS Suffix  . : cyberbox.it
   Description . . . . . . . . . . . : Intel(R) Centrino(R) Advanced-N 6250 AGN
   Physical Address. . . . . . . . . : 64-80-99-55-8C-44
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::79e2:b6fdbf13%13(Preferred)
   IPv4 Address. . . . . . . . . . . : 10.21.12.244(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Tuesday, October 09, 2012 12:52:36 AM
   Lease Expires . . . . . . . . . . : Tuesday, October 09, 2012 2:22:35 AM
   Default Gateway . . . . . . . . . : 10.21.12.1
   DHCP Server . . . . . . . . . . . : 10.21.12.1
   DHCPv6 IAID . . . . . . . . . . . : 291799193
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-34-AB-6D-64-80-99-55-8C-44

   DNS Servers . . . . . . . . . . . : 10.21.12.1
   NetBIOS over Tcpip. . . . . . . . : Enabled

From Ubuntu 12.04 LTS Guest ("ifconfig -a"):

farrell@MyVM:~$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr 08:00:27:e0:38:ad  
          inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
          inet6 addr: fe80::a00fee0:38ad/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:8391 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6665 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:6275631 (6.2 MB)  TX bytes:1125750 (1.1 MB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:98 errors:0 dropped:0 overruns:0 frame:0
          TX packets:98 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:13371 (13.3 KB)  TX bytes:13371 (13.3 KB)

Also, if it's helpful... here's what I'm seeing for nslookup:

farrell@MyVM:~$ nslookup -type=ns .
Server:		10.21.12.1
Address:	10.21.12.1#53

Non-authoritative answer:
.	nameserver = e.root-servers.n et.
.	nameserver = i.root-servers.n et.
.	nameserver = j.root-servers.n et.
.	nameserver = b.root-servers.n et.
.	nameserver = k.root-servers.n et.
.	nameserver = f.root-servers.n et.
.	nameserver = l.root-servers.n et.
.	nameserver = d.root-servers.n et.
.	nameserver = g.root-servers.n et.
.	nameserver = h.root-servers.n et.
.	nameserver = m.root-servers.n et.
.	nameserver = a.root-servers.n et.
.	nameserver = c.root-servers.n et.

Authoritative answers can be found from:
a.root-servers.n et	internet address = 198.41.0.4
a.root-servers.n et	has AAAA address 2001:503:ba3e::2:30
b.root-servers.n et	internet address = 192.228.79.201
c.root-servers.n et	internet address = 192.33.4.12
d.root-servers.n et	internet address = 128.8.10.90
d.root-servers.n et	has AAAA address 2001:500:2d::d
e.root-servers.n et	internet address = 192.203.230.10
f.root-servers.n et	internet address = 192.5.5.241
f.root-servers.n et	has AAAA address 2001:500:2f::f
g.root-servers.n et	internet address = 192.112.36.4
h.root-servers.n et	internet address = 128.63.2.53
h.root-servers.n et	has AAAA address 2001:500:1::803f:235
i.root-servers.n et	internet address = 192.36.148.17
i.root-servers.n et	has AAAA address 2001:7fe::53

Moreover, I can't ping for example 198.41.0.4 which is the first one listed above??

farrell@MyVM:~$ nslookup -type=ns 198.41.0.4
Server:		10.21.12.1
Address:	10.21.12.1#53

Non-authoritative answer:
4.0.41.198.in-addr.arpa	name = a.root-servers.n et.

Authoritative answers can be found from:
0.41.198.in-addr.arpa	nameserver = ns2.nsiregistry.n et.
0.41.198.in-addr.arpa	nameserver = ns1.crsnic.n et.
0.41.198.in-addr.arpa	nameserver = ns4.verisign-grs.n et.
0.41.198.in-addr.arpa	nameserver = ns3.verisign-grs.n et.
ns1.crsnic.n et	internet address = 198.41.3.39
ns2.nsiregistry.n et	internet address = 198.41.3.108
ns3.verisign-grs.n et	internet address = 69.58.179.22
ns4.verisign-grs.n et	internet address = 69.58.179.23

farrell@MyVM:~$ ping 198.41.0.4
PING 198.41.0.4 (198.41.0.4) 56(84) bytes of data.
^C
--- 198.41.0.4 ping statistics ---
8 packets transmitted, 0 received, 100% packet loss, time 7387ms

Thanks to anyone who looked at this issue. I was talking to a friend who's staying at another hotel nearby and it turns out that their routers are simply dropping any packets sent to all but a white-listed set of ports (e.g. 80, 443). I was able to spin up an EC2 node running sshd on port 80... golden .

All set now, thanks again to anyone who took the time to check this out.