I recently did a combination of Vagrant + VirtualBox stuff on my machine to try to get a virtualized Ubuntu install working. However, I had no luck with it so I just uninstalled everything. Ever since then, I've had some issues with using command line applications on my host machine.
I'm on Windows 7 x64. DNS resolution and network connectivity seem to be fine through Chrome browser and other GUI based tools. However, when I launch cmd.exe, I notice weird behavior out of various command line tools.
nslookup
Executing nslookup results in inability to find IP address of basic domain names.
C:\>nslookup google.com
Server: UnKnown
Address: 10.3.1.1
*** UnKnown can't find google.com: No response from server
10.3.1.1 is my router, which supplies itself as the DNS server to clients via DHCP. The router forwards DNS requests to the Google DNS servers. As I said, DNS resolution is working in my browser and through many other applications so I doubt my router setup or DNS servers are the issue. I will leave out those details here to keep the topic simple.
ping
ping works for physical IPv4 addresses but not for hostnames.
C:\>ping google.com
Ping request could not find host google.com. Please check the name and try again.
C:\>ping 8.8.8.8
Pinging with 32 bytes of data:
Reply from 8.8.8.8: bytes=32 time=29ms TTL=52
Reply from 8.8.8.8: bytes=32 time=29ms TTL=52
Reply from 8.8.8.8: bytes=32 time=30ms TTL=52
Reply from 8.8.8.8: bytes=32 time=29ms TTL=52
Ping statistics for _`&:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 29ms, Maximum = 30ms, Average = 29ms
netstat
Now here's where it gets interesting. When I run the netstat command, the Local Address field is empty, although IPv6 addresses still show up. It's just the IPv4 ones that do not. This was working fine before!
C:\>netstat -ano
Active Connections
Proto Local Address Foreign Address State PID
TCP LISTENING 4
TCP LISTENING 544
TCP LISTENING 904
TCP LISTENING 616
TCP LISTENING 4556
TCP LISTENING 6756
TCP LISTENING 1080
TCP LISTENING 4
TCP LISTENING 3612
TCP LISTENING 3436
TCP LISTENING 3436
TCP LISTENING 4
TCP ESTABLISHED 4
TCP ESTABLISHED 5196
TCP ESTABLISHED 2944
TCP ESTABLISHED 1444
TCP ESTABLISHED 3436
TCP ESTABLISHED 2944
TCP ESTABLISHED 2944
TCP ESTABLISHED 2944
TCP ESTABLISHED 2944
TCP CLOSE_WAIT 3612
TCP CLOSE_WAIT 3612
TCP CLOSE_WAIT 3612
TCP CLOSE_WAIT 3612
TCP CLOSE_WAIT 3612
TCP CLOSE_WAIT 3612
TCP ESTABLISHED 3612
TCP ESTABLISHED 2944
TCP ESTABLISHED 2944
TCP ESTABLISHED 2944
TCP ESTABLISHED 2944
TCP ESTABLISHED 2944
TCP ESTABLISHED 2944
TCP ESTABLISHED 2944
TCP TIME_WAIT 0
TCP ESTABLISHED 2944
TCP ESTABLISHED 2944
TCP ESTABLISHED 2944
TCP ESTABLISHED 2944
TCP TIME_WAIT 0
TCP ESTABLISHED 2944
TCP LISTENING 3320
TCP LISTENING 4576
TCP LISTENING 5196
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP TIME_WAIT 0
TCP ESTABLISHED 4556
TCP ESTABLISHED 4556
TCP ESTABLISHED 6756
TCP ESTABLISHED 6756
TCP ESTABLISHED 3612
TCP ESTABLISHED 3612
TCP ESTABLISHED 3612
TCP LISTENING 3612
TCP LISTENING 3612
TCP ESTABLISHED 3612
TCP LISTENING 2960
TCP LISTENING 2044
TCP LISTENING 1420
TCP LISTENING 4
TCP LISTENING 4
TCP [::]:445 [::]:0 LISTENING 4
TCP [::]:1025 [::]:0 LISTENING 544
TCP [::]:1026 [::]:0 LISTENING 904
TCP [::]:1038 [::]:0 LISTENING 616
TCP [::]:3389 [::]:0 LISTENING 1080
TCP [::]:3587 [::]:0 LISTENING 5700
TCP [::]:5357 [::]:0 LISTENING 4
TCP [::]:32400 [::]:0 LISTENING 3436
TCP [::]:32401 [::]:0 LISTENING 3436
TCP [::1]:1028 [::]:0 LISTENING 1768
UDP *:* 1000
UDP *:* 964
UDP *:* 964
UDP *:* 1568
UDP *:* 1568
UDP *:* 1000
UDP *:* 1080
UDP *:* 3612
UDP *:* 3172
UDP *:* 3436
UDP *:* 3436
UDP *:* 3436
UDP *:* 3172
UDP *:* 2944
UDP *:* 3436
UDP *:* 1568
UDP *:* 2944
UDP *:* 2944
UDP *:* 964
UDP *:* 4
UDP *:* 4
UDP *:* 1568
UDP *:* 3436
UDP *:* 3436
UDP *:* 3436
UDP *:* 3436
UDP *:* 3436
UDP *:* 1568
UDP *:* 1568
UDP *:* 2960
UDP *:* 3436
UDP *:* 3436
UDP *:* 3436
UDP *:* 3436
UDP *:* 1420
UDP *:* 1568
UDP *:* 4
UDP *:* 4
UDP *:* 1568
UDP *:* 3436
UDP *:* 3436
UDP *:* 4
UDP *:* 4
UDP *:* 1568
UDP *:* 3436
UDP *:* 3436
UDP [::]:500 *:* 1000
UDP [::]:3540 *:* 5700
UDP [::]:3702 *:* 964
UDP [::]:3702 *:* 1568
UDP [::]:3702 *:* 964
UDP [::]:3702 *:* 1568
UDP [::]:4500 *:* 1000
UDP [::]:5355 *:* 1080
UDP [::]:58964 *:* 1568
UDP [::]:64135 *:* 964
UDP [::1]:1900 *:* 1568
UDP [::1]:64131 *:* 1568
UDP [fe80::2923:9898:cce9:9b60%18]:1900 *:* 1568
UDP [fe80::41ba:5355:289f:f5fa%27]:1900 *:* 1568
UDP [fe80::8c37:8952:a3d5:ca0%20]:1900 *:* 1568
UDP [fe80::8c37:8952:a3d5:ca0%20]:64130 *:* 1568
Things I have done to try to remedy the issue:
- Reboots
- Uninstall NIC drivers; reinstall from motherboard manufacturer
ipconfig /flushdnsipconfig /registerdns- Asked it nicely
None of these worked. Anyone know what the issue is or steps I can take to diagnose it?
Vagrant / VirtualBox Details
I want this at the bottom because it's quite lengthy and potentially irrelevant. However, I want to discuss it because this is what I believe triggered this issue.
I ran a series of Vagrant commands to install Ubuntu Trusty 32 on Virtual Box:
$ vagrant box add ubuntu/trusty64
$ vagrant init ubuntu/trusty64
$ vagrant up
However, it had issues with DNS resolution in the guest OS. So I set a few flags on my VM to get it working:
C:\Program Files\Oracle\VirtualBox>VBoxManage.exe modifyvm "Ubuntu Trusty 64" --natdnshostresolver1 on
C:\Program Files\Oracle\VirtualBox>VBoxManage.exe modifyvm "Ubuntu Trusty 64" --natdnsproxy1 on
While this did resolve the DNS resolutions on Ubuntu guest OS, port forwarding still didn't work. So because it wasn't working I gave up completely and uninstalled Vagrant and VirtualBox after deleting the virtual machines it installed/setup. After this is when I noticed that command line stuff and even commands run though msys weren't working anymore. DNS resolution issues now exist in my host OS!
EDIT
I will amend my question with requests from comments below.
Settings under adapter IPv4:
All available adapters on my system are below, per ipconfig /all command (The adapter named Ethernet adapter Local Area Connection is my real physical network adapter connected to the LAN).
Also note I changed my DNS servers to 8.8.8.8 and 8.8.4.4 respectively. Normally my gateway is my DNS server (10.3.1.1). I did this to rule out any issues with my router and per someone's suggestion in the comments.
C:\>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : Robert-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : home
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : home
Description . . . . . . . . . . . : Qualcomm Atheros AR8151 PCI-E Gigabit Ethernet Controller (NDIS 6.20)
Physical Address. . . . . . . . . : 90-2B-34-57-0D-24
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::8c37:8952:a3d5:ca0%20(Preferred)
IPv4 Address. . . . . . . . . . . : 10.3.1.38(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Monday, May 25, 2015 9:35:57 PM
Lease Expires . . . . . . . . . . : Tuesday, May 26, 2015 9:36:00 PM
Default Gateway . . . . . . . . . : 10.3.1.1
DHCP Server . . . . . . . . . . . : 10.3.1.1
DNS Servers . . . . . . . . . . . : 8.8.8.8
8.8.4.4
NetBIOS over Tcpip. . . . . . . . : Enabled
Ethernet adapter Local Area Connection 3:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Cisco Systems VPN Adapter for 64-bit Windows
Physical Address. . . . . . . . . : 00-05-9A-3C-78-00
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::2923:9898:cce9:9b60%18(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.155.96(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 654312858
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1A-03-8A-D9-90-2B-34-57-0D-24
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter Local Area Connection* 11:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Reusable ISATAP Interface {D85DF6F3-7D47-4198-B7B9-DD5680A8A6E7}:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #4
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
With my DNS manually set to Google's DNS servers, I ran nslookup (output below). Note that I am still not able to resolve hostnames using nslookup or ping after the DNS change to Google DNS servers.
C:\>nslookup
Default Server: UnKnown
Address: 8.8.8.8
8.8.8.8and8.8.4.4respectively.ping google.comstill doesn't work. I saved the settings and disabled/reenabled the adapter. Still nothing!