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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CIDR < 5 not allowed

Problem Two NICs have been connected using an ethernet cable. The ethernet adapters have been configured as follows: NIC I IP: 8.0.0.1 Subnet mask: 248.0.0.0 NIC II IP: 8.0.0.2 Subnet mask: ...
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How can I tell if my wired ethernet connection is using 802.1X authentication on Windows 7?

From a command prompt (or a script) I'd like to be able to query the wired interface to determine if it has succesfully established an 802.1X connection, or if it has fallen back to unauthenticated ...
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Are the network interface card same in all cisco devices

I have old cisco 2600 routers but they dont have any network interface card My friend has cisco pix firewall which has network card attached with 4 ports so can i pull the network card from cisco ...
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Trouble setting up more than 4 network adapters in VirtualBox (XP Guest)

I've been trying to setup the 8 network adapters that VirtualBox is supposed to support, through the command line. I need them as bridged networks (because I use them to forward ports from a server ...
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112 views

This device cannot start(Code 10) when installing a new NIC

So I've recently bought a new Intellinet Fast Ethernet PCI Network Card, and I can't get it to work. I've tried uninstalling the previous ethernet card drivers and reinstalling the new ones, but it ...
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61 views

Hardware specifications for WOL (Wake On Lan)

I am planning to buy a computer, which I would like to start using Wake-On-Lan from outside the LAN. I was looking on the internet and there is lot of information to be confused. 1) What are the ...
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how to up/down remote NIC card or PORT using ifconfig or any other command?

please tell, how to remotely up and down the port using ifconfig unix command? $ ifconfig eth0 down $ ifconfig eth0 up where eth0 is my nic card interface!
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What type of cable do I need to connect to this storage box

I have this Hitachi Storage box (Hitachi DF600-RKAJAT Hard Drive Array): It has fiber drives, and I have a Fiber channel card like this: How can I join them?
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359 views

Cannot visit some pages in browser

I have just installed my new network adapter for wireless connectivity. I am using TP-LINK TL-WN727N. I installed the drivers from the manufacturers website to get the latest version. The installation ...
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5k views

Is the reason for weak wireless signal on new laptop the wireless card itself or the antennas?

I just bought a new laptop ASUS N550JV. I wanted to test the wifi receivers of my two laptops (the old and the new), so I put them together and scanned for the neighboring wireless connections. My old ...
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Tunnel adapters on ipconfig?

Hello I recently noticed unusual information in my IPCONFIG. Usually I only see Ethernet adapter Local Area Connection, but now I see Tunnel adapter isatap... and Tunnel adapter Teredo... I was ...
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702 views

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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135 views

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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93 views

VirtualBox network adapter blocking samba share

My host is Windows 8.1, my server is a Raspberry Pi (irrelevant). My server is giving all nodes on LAN a samba share, however my desktop has VirtualBox installed. I am unable to access my samba share ...
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176 views

DNS server cannot get DNSSEC information

I did the netalyzr test which checks some ports and network configs. The result was strange. It contained a problem with DNSSEC: Only some DNS root server instances returned proper DNSSEC ...
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Can't disinstall Intel(®) Centrino(®) Wireless-N 100

I need to disinstall Intel(®) Centrino(®) Wireless-N 130, but when I try to disinstall it, nothing appens: ComputerManagement -> Device Manager -> Network Adapters -> Right-Click on Centrino -> ...
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47 views

Is there an fast open-source portscanner? [closed]

Looking for a fast open-source c# port scanner ? Using handshake layer, pcap. Want some example for studying purposes.
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229 views

Bind incoming packets to 1 interface and outgoing packets to 2nd interface?

I am have a Linux machine with 2 network interface cards, I need to use one for incoming packets, other for outgoing packets.
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Does a VirtualBox/CentOs need two adapters to work properly ?

I have a Windows 7, 32bit, HP Laptop. I have CentOs 6.5 running on VirtualBox 4.3.10. Here is my eth0 config. Code: #vi /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 ...
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804 views

How to disconnect/connect ADSL modem connection to ISP by command? (Windows 7 SP1 x64)

I want to write that command in a .bat file and run it by windows scheduler at certain times of night and morning. (for example: open connection at 23:00 and close it again next day at 9:00 ...
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229 views

How to use netperf on specific NIC port?

I have two servers, SERVER and CLIENT and each server has its own onboard 1 GbE ports, and its own NIC with a 10 GbE port. SERVER and CLIENT are interconnected on both a 1 GbE switch (administrative ...
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849 views

ethernet interfaces are sometimes renamed to 'renameX' on startup

I've installed a recent daily build of Ubuntu Trusty on several HP dl380e 2U servers. These servers have 4 x 1Gb onboard NICs. In addition, I've installed a PCIe 2 port 10Gb NIC in each server. The ...
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How can I diagnose suspected NIC issues?

Over the past few days my ethernet-wired internet connection has started acting up. Here are some of the issues I've encountered: Websites are intermittently slow to load. Large downloads routinely ...
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3answers
548 views

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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167 views

Laptop Wireless Adapter Periodically Vanishes from Computer Manager

I have a HP dv9000 laptop that has begun exhibiting some strange behavior. Every few hard boots, the wireless network adapter disappears from the configuration - it doesn't show up in Computer Manager ...
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Using DHCP to get multiple IP addresses on single NIC on RedHat

I am trying to obtain multiple IP addresses using the ISC dhclient supplied with Red Hat Enterprise Linux 5 in order to provide the IPs to multiple applications, which will run on separate virtual ...
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Network adapter settings via cmd

How to open setting of the specific network adapter via commandline in Windows 7 Enterprise? I'm under domain user but also have access to local administator user. Under domain user I have no rights ...
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How to Tell If NIC supports Gigabit Ethernet

How do I know if my network card is capable of gigabit speeds under Windows 7?
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WindowsCE device with single NIC - Two IP address ranges

People, I have got a question about a windows CE device which has a single NIC (and no possibility to extend the device with a second NIC). This device is configured to use a fixed address CE ...
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104 views

Why do hubs and switches receive on pins 1 and 2 and transmit data through pins 3 and 6 of their cable?

Is there any reason they couldn't have been made to use the same pins as NICs and routers for transmitting and receiving? I had trouble finding any information about this through Google, so I hope you ...
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2k views

Desktop network connection keeps dropping but everything else stays connected

I'm running Windows 7. Recently added a new wireless printer (HP Photosmart) and everything was working fine. Then I started losing internet connection on my desktop. Desktop is connected to the ...
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5answers
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Windows 8 Hyper-V - how to give VM internet access?

I've got Windows 8 Pro on my home machine. I want to have a Windows 7 Professional VM running under Hyper-V, and I want the VM to have full internet access. My physical machine has a wireless network ...
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How does synchronization between two independent computer's NIC work (e.g. on Ethernet)?

I'm currently studying computer networks and the question came to my mind, how it is physically possible for the NICs of two networking computers to determine the clock rate of incoming datastreams. ...
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Windows internet connection only after deactivating and activating LAN adapter

When I start my Window 7 PC I get no internet connection. LAN works, but internet does not. If I deactivate and then reactivate the LAN adapter, I get an internet connection. Any idea what could be ...
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Which is better:1x1ac or 2x2n, on an 802.11ac network?

I am configuring a new hp computer and I was wondering if I should get 802.11ac network card that is 1x1 or if I should get a 802.11n network card that is 2x2. I am on an ac network. So the ac card ...
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142 views

I don't have eth0 but eth1

How come I don't have eth0 but an eth1 instead? I restart service udev, like below, but my ether card is still eth1, not eth0 % service udev --full-restart * Stopping the hotplug events dispatcher ...
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A few computers loss internet but can access local resources , other 8 never loss connection

This is a small network with Comcast ISP ( Cable ), there are 11 PC connected to network all are wired Ethernet, the same 3 computers will loss there internet connection sometimes, not all at same ...
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Enabling eth0 or eth1 for internal network in computer without internet access

I am installing virtual box in computer without internet access. I am not sure this computer has network adapter (Ethernet) or not. I have two virtual machine which can communicate each other (I ...
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Capturing wireless traffic (using Wireshark)

When I run wireshark on a wired network it works fine and reports all of the packets. When I run it on a wireless network though I only see my own traffic. The wireless card I have is supposed to ...
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Why I get a VMnet Network Adpater's IP even if my Wireless Network Adapter has priority?

On Windows 7, when I try to ping my computer name I get an IPv6 address, so I ping with -4 option, then I get an IP related to my VMnet (VMnet1) Network Adapter which results 192.168.220.1, and not ...
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Connect a second netowrk powerline adapter to network

I bought a network power line adapter and it works well. The unit I bought came with 2 adapters, one plugs into the router and the other goes to the computer. I wanted to know if I was to purchase ...
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What angle is optimal for the antennas on my wireless network card?

I'm sharing a house with some friends and I'm in the bedroom right up in the attic. The router is right down on the ground floor and I get connectivity issues. I've found that if I adjust the two ...
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HP J8156A Vernier network adapter

I've got a network card, that may or may not be working that I am trying to use in my home server. Got it from ebay as "used".The card does not let the computer boot, the computer turns on, but ...
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Ubuntu 10.04 No internet

I have Ubuntu 10.04 dual booted with Windows Vista on a work Lenovo R61 laptop. The home and work wireless connection were working fine. I lost all internet connection at work. The IT guy clearly knew ...
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66 views

IPConfig lists very strange tunnel adapter

I was trying to troubleshoot a different computer on my network, and ran ipconfig on MY computer for reference. One of the adapters listed is - Tunnel adapter satapi.GHGKZ.com: Google has ...
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591 views

A quest for internet access ( Unidentified network and Error 651 )

I'm stuck with one of the most harsh problems i had to deal with, regarding fixing my computer.Im trying to solve it for days ( have searched a lot on the web ) and no results so far. The problem is ...
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90 views

Connected with limited access (drivers?)

My PC with Windows Vista had some wireless problems 3 years ago, so I bought a wireless adapter, which worked fine. But a few days ago, it suddenly didn't connect anymore; the network manager says it ...
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NIC does not like network cable

Alright Gang, I have a good problem for you guys. I have a test station with a network cable that works flawlessly on every single NIC it connects to EXCEPT nforce ones. Why in the world, would ...
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Traffic Route mismatch with two NIC Windows Server 2008

I have small issue on my network I have two NIC, NIC 1 Connected to the internet and local network, NIC 2 Connected to Sip Trunk Circuit (No Internet) Each one of them has different Gateway. My ...
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Convert or add a localy installed linux distro to PXE-boot server

I have a Linux distro installed (debian) and configured in a VM. I'm looking for a way to add it to my PXE-server so that clients can boot to it (live session) Very confused at the moment, should i ...