A network interface controller (also known as a network interface card, network adapter, LAN adapter and by similar terms) is a computer hardware component that connects a computer to a computer network.

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Connecting to Bluetooth Personal Area Network Fails

I'm trying to connect to my phone's Bluetooth PAN but nothing happens when I do. I click the button that says "Connect Using" which gives me two options: [Option 1] "Direct Connection" ...
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role of virtual network adapter

Please correct me if I am wrong in saying that network adapters(not considering virtual network adapters) represent a particular interface of a machine having a unique MAC address which can establish ...
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Can't get IP on Windows 7 after extensive troubleshooting

My Windows 7 system is not able to pull an IP from my router's DHCP. This just started a few days ago, and I've done quite a bit of troubleshooting. Here's what I've tried in roughly chronological ...
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Is it possible to connect a NAS to both WAN and LAN at the same time?

Thinking of upgrading my Synology DS209 NAS to a newer model with dual gigabit ethernet connections. Currently my NAS sits outside my LAN, connected to WAN through one of my modem's four ports, ...
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431 views

PC flooding & crashing network switch only after it's shutdown

I discovered this problem because EVERY SINGLE TIME I left the house my Internet connection would go down and I would not be able to remotely access my netowrk. I installed Windows 8.1 RTM on my ...
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ethtool available network interface ports

# ethtool eth0 Settings for eth0: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Supports ...
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Do I need to replace my NIC or how is there a software based solution?

My connection intermittently fails and it is not because of my home phone or a microwave oven. I have a Realtek RTL8190 802.11n Wireless LAN (Mini-)PCI NIC. My signal strength is excellent. My ...
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134 views

how to route local IP to use NIC and other to use Wifi NIC

Like most, my desktop has Wifi NIC and LAN NIC but today most of the time we only use Wifi ... since most house does not have LAN in every room but I want to create a specific network that does not ...
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Kernel bypass possible with non-specialised NIC?

Is it possible to perform kernel bypass and have a NIC send data to the user space (where I will write my network stack) with no copying, without having to purchase a specialised Solarflare etc NIC?
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207 views

How do virtual servers interact with the host machine's networks?

I've had this question long ago and still I've been unable to find a correct answer to it. I know it's possible to run several virtual machines. Let's say that I'm running Windows Server 2008 R2 with ...
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3k views

How do I install the Microsoft 6to4 Adapter?

I'm unable to see the 6to4/Teredo adapter anywhere in my Windows 7 installation. In my Device Manager, the only network adapters are my wireless Realtek card, and "TAP-Win32 Adapter OAS" which is for ...
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196 views

How can I *quickly* cycle the a Wifi Network Adapter in Windows 8

Before you close this as a duplicate, please read carefully. In Windows XP, when there was a problem with Wifi, you could right-click on the icon, and the context menu allowed you to disable/enable ...
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Is it possible to configure a static IP alternative for all adapters using the registry?

I was reading the alternative configuration documentation, and thought I'd try to setup a fallback static IP to simplify my setup: ...
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36 views

Forwaring request from specific NIC in windows 7 client

I have a client in my network which it has 2 NIC, assume eth0 and eth1. A specific scanner with ip address of 192.168.1.1 is connected to eth0 of this client and eth1 is connected to my network. In my ...
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838 views

How to Create WiFi Hotspot with Single Adapter in Windows 7

I know how to create a hotspot when connected to a wired network, but when I am using internet from a WiFi connection, this disconnects the wireless connection the moment I activate the hotspot. In ...
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119 views

Wifi USB Adapters stop working after a couple of months

My Belkin Dual band USB adapter just stopped working. It doesn't work no matter how much I try troubleshooting it. I get an error: USB device not recognised This is third time in last six months ...
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456 views

Why does Ubuntu 12.04 detect only one USB Ethernet adapter?

The problem is that I am connecting three client computers to another central computer through: the one normal Ethernet port connected to one client computer (eth0) two USB to Ethernet adapters ...
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156 views

My laptop's network card is acting very strange

I have a Dell inspiron 1726 laptop. When I try to connect to the Internet via my wired network it drops packets. (I can access the Internet just fine from another computer, so the problem is with the ...
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3k views

Two wireless NIC on RaspberryPi

I want to be able to use two wireless network adapters on my RaspberryPi running wheezy (Debian).One card is to be used to connect to the network and I want the other to run in the monitor mode. Two ...
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How to troubleshoot network problems after fresh install of Linux?

Almost every time I install Ubuntu on any laptop there are some problems with connecting to the Internet. After the last installation neither Ethernet nor Wi-Fi is working. What would be the steps to ...
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74 views

Cannot Connect to Windows Server Using a Particular IP

We have a Windows server 2008 running as web server. The Server has two IP's (A and B) added to it. We were able to use both the IP's for remote desktop connections and FTP connections. All of a ...
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110 views

Hyper-V Network Adapter

I have a setup a Hyper-V VM on my server. I have the NIC setup in Hyper-V manager. I also have the my VM settings pointing to my NIC. I can't access the Internet. Here is a picture of my Hyper-V ...
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What is the real capacity of a network device (ethtool - MiB or MB?)

MiB = MebiByte = 1024*1024 MB = MegaByte = 1000*1000 ethtool returns speed = 1000MB/s ifconfig documentation indicated it returns units of MiB How can I tell from that ...
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108 views

Find processes using a network device

How do I find which processes are using a given network interface at any given moment? I am using Fedora and Ubuntu.
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213 views

Windows XP change the order of IP address in a NIC having multiple ip address

I've a NIC with two IP address. Now how can I change the order of the IP address so that I can bring any one to the top and have precedence over the other IP addresses. I know I can change that from ...
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141 views

Limited connection whenever I connect to a Wi-Fi network outside the company

Whenever I connect my work laptop to a wireless network outside of my company, the connection shows as Limited, and there is no internet access. I have tried several times by disabling/enabling the ...
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576 views

Binding a program to a specific Network Adapter

I am just using my windows7x64 desktop and I want a utility/program that allows me to chose which adapter a program uses for example, running a game through Adapter1 and Streaming videos through ...
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HP DL380 using HP NC522SFP NIC shows supported link modes: not reported

When using ethtool on this NIC, the supported link modes show "not reported". Any idea why this is the case? Settings for eth0: Supported ports: [ FIBRE ] Supported link modes: Not reported ...
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101 views

Bridge NIC to VM without it being used by Host-machine?

I would like to bridge some network cards so that my virtual machines, running in VMware workstation 9, can connect through them, but not the physical windows computer on which the VM's are running. ...
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What could be causing two different laptops both with Wireless-N adapters to have very different speeds?

My dad recently bought a Dell XPS 14 laptop that had an integrated Intel(R) Centrino(R) Advanced-N 6235 wireless adapter, but it appears to be known to drop connections a lot. He'll suddenly get ...
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Why can't I seem to keep a reliable connection when utilizing two adapters?

I'm currently in an interesting situation. All of my computers are connected to a wifi network (which has an internet connection). Connecting to that is easy enough. In my room I also have a local ...
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Devices with user re-writable MAC addresses [closed]

I'm looking for routers, cell phones, Internet sticks etc. that have user modifiable MAC addresses. Does anyone know how to spot them?? Also how to write the MAC address.. I've heard Linux is a good ...
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454 views

Specific ethernet cable not working with router only, but works with NIC

I have a DLink DIR-605L, which is a 10/100 Mbps (non-ADSL) router. I am connected to it on a Desktop with a Realtek Network Adapter onboard MSI P45 Platinum. I also have an Asus X54H-SX137D. Both ...
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280 views

Cable unplugged after NeoRouter connection disabled once

Network adapters can be disabled and then enabled again in Windows. This doesn't work for the NeoRouter network adapter, which is a VPN shell. What happens is that once disabled, this adapter can't ...
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How to automatically change network adapter settings upon new network

I am connecting to many different networks on a regular basis. Some use DHCP and the other requires a static IP to be set in different network classes (10.x.x.x, 192.168.x.x) Is there a way to set ...
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Speed/Duplex auto-negotiation suddenly stopped working

Today my internet suddenly stopped working and the network adapter started cycling between "Network cable unplugged" and "enabled". I googled the issued and some people suggested to modify the Speed ...
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424 views

Dummy interface in an LXC guest

I am trying to create a split-horizon PPTP setup as described on my website within an LXC container. However, I need a dummy interface within the container to put the DHCP server on. Here comes the ...
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If there are 2 NICs on the same machine, can a TCP client on one NIC connect to a TCP server on the other NIC?

I use TUN/TAP to create a tun NIC tun0 with IP 10.10.10.2, and I have a real NIC eth0 with IP 202.112.34.49 Then I run a TCP client which binds its socket to 202.112.34.49 and a TCP server binding ...
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Several hardware components either work or not after booting

I have a desktop computer which I put together myself and in the last weeks I discovered a strange behavior. The same issue refers to three components independently. The onboard network controller, ...
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“This device cannot start” error - Intel motherboard, 3-COM NIC

I have an old(ish) computer with an Intel D850EMV2 board. I've installed a 3COM 3C-905C-TX NIC on it. Windows boots fine, but the NIC exhibits a This device cannot start (Code 10) error. My BIOS ...
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Linux Mint chooses random MAC address on bootup

Every time I start a machine with Linux Mint 14 installed, the Ethernet NIC chooses a random MAC address to use. Is there a way to disable that behavior?
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Windows 7x64 ENT - Network card fails after Windows Update

I am building a new desktop from scratch. I installed win7x64 ent and everything worked fine. I then let the system perform the initial update to windows. There were 152 updates totaling over ...
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659 views

My network adapters can't detect 802.11a radio wifi

I have two adapters, one has the Atheros AR9002WB-1NG and the other is a LAN USB Adapter #4. For some reason or the other they both can't detect 802.11a connections. Can someone explain this to me?
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How to set NIC in promiscuous mode on mac book air?

I am trying to run my nic on MacOSx at promiscuous mode and then use tshark / tcpdump Option1: ifconfig en0 promisc but I get this message: ifconfig: promisc: bad value Option 2: I tried sudo ...
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How to identify which network interface is my application using [duplicate]

I hoped to capture network traffic -using Wireshark- via a port on which my application is running. However when I fired up Wireshark, it listed 4 network interfaces not just 1 as I expected. So I ...
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940 views

Windows Network Bridge Connections Greyed Out

I can bridge the connection under administrator account. I have disabled the prohibit installation and configuration of Network Bridge on your DNS domain network Group Policy setting. The option to ...
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Extract ip address from specific NIC in win7 batch file

I am building a batch to automatically switch a proxy config and the related ip settings bui i am having trouble extracting the ip address of the network adapter i need. I have one "real" nic, and two ...
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ping using mac addresses or link local ipv6 addresses

I have 4 Virtual Machines (Ubuntu 12.04) running on a host that is also running Ubuntu 12.04. The Virtual Machines are named: switch-vm vm-1 vm-2 vm-3 Below are the network settings on switch-vm: ...
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No network after Windows crash

Windows 7 crashed on my Toshiba Satellite Pro s500. Following reboot, neither the LAN card nor the wireless cards work anymore. The LAN card appears on the Device Manager, but not on the Network ...
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Restarted PC and my network controller can no longer be found

Pretty much what the subject says; I did a restart of my computer and now my network controller (it's integrated in my Asus motherboard: ASUS M5A97 R2.0) doesn't appear anymore as detected hardware; ...