a command from Linux POSIX operating system able to give information about the IP network.

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What is the number that comes after the interface name in “ifconfig -a” output?

What are these numbers 2043, 2091, 2276, 2324 that comes after the interface name—such as eth4 in this example—when I use ifconfig -a? eth4 Link encap:Ethernet HWaddr 00:0F:53:27:81:00 ...
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407 views

What is creating the utun0 network interface on OSX? What is for? What is it exactly?

What is creating the utun0 network interface on OSX? What is it being used for? What is it exactly? The interface only appears after connecting to the Ethernet or turning on the Wi-Fi and goes away ...
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214 views

Run ifconfig without sudo

I have an embedded Linux running on a imx6 platform. This is a freescale embedded linux. The problem is that there is no sudo available for this linux, but I need to activate and deactivate the wlan0 ...
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424 views

ifconfig, ethernet device name too long and get truncated, how do I know the actual name?

I'm trying openSUSE 13.1 x86, but immediately encounter an annoying problem. In this openSUSE version, compared to 12.2, ifconfig does not show network device name as eth0, eth1 etc, but use a ...
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2answers
966 views

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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4k views

how to test a VLAN set up under OS X Mavericks

I tried to set up an "internal" VLAN, with my mac (running Mavericks) routing this segregated traffic to one of the hardware interfaces. I think this should work irrespective of how people connect to ...
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77 views

Check NIC is connected to a router

I have access to a remote machine which has two network interfaces, eth0 is connected to same network I am in, so I am able to connect to it. But I need to test some usecases on eth1 but I am not sure ...
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317 views

Convert ifconfig command to iproute2

I am using this ifconfig command to set IP on a network interface ifconfig eth0 x.x.x.x netmask x.x.x.x mtu 1400 Now they say that ifconfig is deprecated and I should use iproute2. I converted ...
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Easy persistent network config on ubuntu server

I'm having some problems configuring a static IP on my ubuntu server. What is the easiest way to configure IP, netmask, nameserver and default gateway on eth0? I've tried modifying the ...
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How to remove redundant inet from ifconfig in Mac OS

Lately I have assigned the en3 interface (which is in reality a USB-Ethernet converter device) the IP address of 192.168.2.1 I did this for Internet Sharing, i.e. to share the Ethernet (en0) with ...
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Assigning static IP address to Debian machine?

I don't know how to use a static IP address on a Debian machine. Can anyone help? I have the static IP address 83.222.248.100. This is what I've tried: $ cp /etc/network/interfaces ...
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What layer does ifconfig operate at?

What layer does ifconfig operate at when setting a MTU. Does it set the MTU for the physical device (Network Interface Layer) or the MTU of the packet (Internet Layer)? By executing ifconfig eth0 ...
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8k views

ifconfig return “unknown interface: no such device”

I'm trying to install a Linux driver for my wireless network card (D-Link DWL-G510) on my Red Hat Linux 7.1 machine with a 2.4.37.9 kernel. I downloaded the serial monkey driver from the sourceforge ...
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Why are there so many network interfaces in OS X? [duplicate]

The ifconfig command prints this output: lo0 gif0 stf0 en0 en1 fw0 en2 bridge0 p2p0 vnic0 vnic1 Is it normal to have all these interfaces?
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ifconfig shows no active connection (Mac os X)

I'm running os x 10.9.1. In terminal, just ran the ifconfig command, and despite having an active internet connection via USB dongle, none of the interfaces read any inet or inet6 address (except ...
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Why can we add virtual interface using `iw dev <devname> interface add…`

I knows that with mac80211 we can create multiple virtual interfaces on one physical device. From iw's official docs I found this could be done by these two commands: iw dev <devname> interface ...
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28 views

IP for virtual interface gets assigned to physical interface

I'm configuring a physical NIC and a virtual interface based on it as follows in /etc/network/interfaces: auto eth0 iface eth0 inet dhcp auto eth0:1 iface eth0:1 inet manual post-up ifconfig ...
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24 views

Will dead network hardware still show up in Ubuntu ifconfig?

I have an Intel NUC and I suspect the onboard ethernet port died, but I'm surprised it still shows up in Ubuntu as eth0 in ifconfig. Is this behavior to be expected, or should I suspect some other ...
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54 views

How to create new localhost interface in Windows?

In *unix you can write: sudo ifconfig lo0 127.0.2.1 up But how to do this command line in Windows?
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285 views

CE interface in Solaris 10 drops mac address (per ifconfig)

I recently installed Solaris 10 1/13 and proprietary TCP PEP software on a new hard drive within an old Sun v210. When the PEP software starts, the Sun's CE0 interface loses its "ether" address, ...
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124 views

VMware Fusion 5 Ignoring dhcpd.conf

I'm trying to set a static IP for my CentOS 6.4 VM that I'm running via VMware Fusion 5. Steps I took: ran ifconfig, copied HWaddr shut down VM. added to the end of /Library/Preferences/VMware\ ...
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350 views

how to change ip address in the correct way on linux?

I'm working with wheezy. I have configured the /etc/network/interfaces file so that the wlan gets the ip address from the dhcp server. after that I have imposed a different static ip address in the ...
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152 views

What are ifconfig.me/forwarded IP addreses?

When I use the ifconfig.me service, by running the following command: $> curl ifconfig.me/forwarded I returns a list of IP addresses. does anyone know what this IP addresses are. I am behind a ...
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210 views

ip address seen in ifconfig in os x which is not present in network setting

I have a macbook and some while back I must have assigned it an ip address of 192.168.2.1 on the ethernet interface. The problem is that the ip is still seen even when I have removed it from the ...
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647 views

2 NICs conflicts on Windows 7 together

I have 2 NIC's on my computer. I have connected one with a GigE camera and the other to a switch which in turn connects it to a video server. If only one device (i.e., GigE camera or video server) is ...
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813 views

ifconfig won't let me set MAC address that doesn't begin with 00:26

I have an Intel 1000 BGN Wi-Fi card and I tried to set its MAC address to 00:00:de:ad:be:ef, but this didn't work: [root@localhost .]# ifconfig wlan0 hw ether 00:00:de:ad:be:ef SIOCSIFHWADDR: Cannot ...
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168 views

How can i set my vm to have exclusive access to my ethernet port in mac os x lion?

I have a vmware of windows 7 on osx lion. I am on a corporate network that assigns IPs via DHCP through ethernet, and i also have an airport card thats connected to a 4g hotspot. This corporate ...
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957 views

why does my time warner cable modem connection enter dead period states every 20 mins?

My wifi connection (from my MacBook running Snow Leopard) to a Time Warrner cabel model and router has a recurring connection problem. Every 20 minutes or so it will enter a "dead state" where no ...
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1answer
646 views

why does “ipconfig getifaddr ppp0” fail?

I am trying to find my IP on VPN (PPTP) so I tried "ipconfig getifaddr ppp0" but it gave me "get if addr ppp0 failed, (os/kern) failure." Why does it fail and what should I do instead? ifconfig shows ...
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117 views

Network configuration

This is my situation: Router A: IP 192.168.1.1 Mask 192.168.1.0/24 - Connected to the internet. Server: - Interface eth0: inet addr:10.1.1.125 Mask:255.255.255.0 (connected to router B) - Interface ...
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Configure the Ethernet Interface from the Command Line

I have connected to a Virtual Server with an SSH client using IP address: 172.xx.xx.154/22 I have been asked to configure eth1 to 172.xx.xx.155/24 with gateway IP Address of: 172.xx.xx.1 Any help ...