a command from Linux POSIX operating system able to give information about the IP network.
12
votes
2answers
3k views
ip versus ifconfig
After reading this answer, I began my quest for the difference between ip and ifconfig for *nix systems. I soon learned that ip had "more" features than ifconfig, but what's the real difference? Is ...
8
votes
2answers
4k views
Mac OS X: Please explain ifconfig output?
When I do ifconfig on my Mac, I get a list of the following interfaces:
lo0
gif0
stf0
en0
fw0
en1
vmnet8
vmnet1
I wonder what each interface is. Also, which of these is the IP interface ? I don't ...
7
votes
5answers
3k views
Ifconfig Alias Address Assigned by DHCP
I would like to create several aliases to eth0, but have the addresses assigned by DHCP instead of being set to static IP's. Is this even possible?
All the examples I've seen assign a static IP ...
3
votes
5answers
2k views
What cross-platform command-line tool allows me to get my external IP address?
How do I get my external IP address from the Windows and Linux command line?
On Windows, ipconfig shows an internal network IP address, but it does not show the external one.
3
votes
4answers
194 views
Three computers accessing internet but only two network interfaces showing in ´ifconfig´, why?
My gateway(router) is connected to DSL.
The gateway connects to 1 wireless transceiver device. 2 fixed computers connect to the router. At the moment of me doing ifconfig 2 fixed computers were ...
3
votes
2answers
460 views
Is `ip` to supersede `ifconfig`
A friend of mine said that ip is supposed to be the successor of ifconfig and iwconfig — yet I found no Wikipedia article about it and have never seen anyone mention or recommend it online even though ...
3
votes
1answer
127 views
How to set txqueuelen on Mac OS X
How can I set the transmit queue length for a network interface on Mac OSX? On linux the command would be
ifconfig en0 txqueuelen 5
but OSX doesn't recognize txqueuelen as a valid option. Where ...
3
votes
2answers
4k views
How do you change your Airport or Ethernet MAC address in Mac OS X 10.6?
I have a MacBook Pro and would like to set a custom MAC address for either my Airport WiFi card, or Ethernet port. In older versions of Mac OS X, you could do it like this:
$ sudo ifconfig en0 ether ...
2
votes
2answers
2k views
How to see network traffic per interface in FreeBSD?
want to see an amount of traffic passed through interface since boot. It's an ISPManager VDS with FreeBSD 8.0, and
ifconfig -L epair521b -B
does nothing.
Want to have output like Linux's ifconfig:
...
2
votes
3answers
2k views
How to detect VPN disconnection with vpnc?
What is the easiest way to detect that a vpnc connection on Linux/Ubuntu has disconnected?
Manually, I think the way to detect is to check whether the interface (tun0) appears in /sbin/ifconfig ...
2
votes
3answers
1k views
How to restore MAC address in Linux?
I have changed my MAC address in my Linux machine using ifconfig. Now the problem is I have not saved my original MAC address. I want to restore it without rebooting.
Is there a way to do it?
2
votes
0answers
168 views
Script to join WPA2 Enterprise wifi
When I head to work with my MBP running OSX 10.7, I have to go through this series:
Join Other Network
Enter SSID
select Security = WPA2 Enterprise
generate a pw via my RSA soft token
Join
...
1
vote
1answer
158 views
ifconfig - who decided that MAC address should be lowercase?
On some Linux computers, ifconfig displays the MAC address ("HWaddr") hex digits in uppercase. On other Linux computers, the [a-f] digits are lowercase.
Why the difference? Are there two competing ...
1
vote
2answers
207 views
change IP address permanently with ifconfig in debian
I know there are several tutorials on how to manually change IP settings manually, however I have yet to find a solution that fits my needs. I need to be able to script something that changes the IP ...
1
vote
3answers
12k views
Spoof MAC address from IP command
I'm trying to spoof my MAC address on a modified version of Linux (Android). The main problem is that because it has been stripped down, the ifconfig command has been taken out, and I only can use the ...
1
vote
1answer
50 views
curl ifconfig.me and ifconfig showing different results
If I run curl ifconfig.me I get one IP, and if I run ifconfig, I get other IP's. Why is it so ?
1
vote
1answer
51 views
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 ...
1
vote
1answer
93 views
How to run 'ifconfig wlan0 down/up' with a comm user?
I need to run ifconfig wlan0 down and ifconfig wlan0 up with my common user.
How can I perform this?
1
vote
1answer
598 views
How does Mac OSX prioritize network interfaces when routing?
To give a concrete example, how does OSX choose which of these default entries from netstat -nr to route to?
Destination Gateway Flags Refs Use Netif Expire
0/1 ...
1
vote
1answer
790 views
What does eth0:cp1 refer to in ifconfig on CentOS?
I have a basic ubuntu background and am not familiar with the output of an ifconfig on a CentOS server I'm looking at, can someone explain the eth0:cp1, and eth0:cp2 entries here?
How are they ...
1
vote
0answers
113 views
What causes a TX overrun, and how to troubleshoot?
On a Linux machine acting as a router I have a large number of TX 'overruns'.
The machine routes through a tunnel interface (which is where the overruns are occuring). What would cause these ...
1
vote
0answers
201 views
ifconfig fails to install route if interface ip is existing broadcast address
Consider the following setup:
X@Y:~$ sudo ip link add link eth0 name eth0.3 type vlan id 3
X@Y:~$ sudo ip link add link eth0 name eth0.2 type vlan id 2
X@Y:~$ sudo ifconfig eth0.2 192.168.2.1/30
...
1
vote
1answer
103 views
how to force an illegal netmask in ubuntu
I want to force a netmask on my Ubuntu machine.
For example, I want 11.0.0.1 to get a netmask of 255.255.255.0
I tried editing /etc/network/interfaces and I forced the desired netmask, but as soon as ...
1
vote
2answers
166 views
Ethernet and PPPoE conflict with each other
I have an old computer in my dorm room. It acts as a gateway and traffic-shaper (htb) for me and my roommates.
Debian is installed into it. It has been working quite good for a year. Nothing ...
1
vote
1answer
380 views
Configure IP v6 on Linux machine
I use this command to assign a site-scope IP address:
$ sudo ifconfig eth0 inet6 add fee3::216:cbff:fe94:1a86/64
$
Check it with ifconfig:
$ ifconfig
...
eth0 Link encap:Ethernet HWaddr ...
1
vote
2answers
2k views
Delete eth0 avahi from the ifconfig list
Hello this is the response I get from ifconfig. Now I have two eth0 things being showed up. I need to delete the second one which says eth0:avahi. I posted my ifconfig's response on a site as I has ...
0
votes
2answers
803 views
slackware cannot reconnect to local network
Hi guys this problem is frustrating me. After trying a lot of things to setup my wireless card, I decide to test it by shutting down LAN ifconfig eth0 down. Then because the wireless does not work I ...
0
votes
1answer
76 views
Network conf - ever time must set ifconfig
I need to autoconfigure network.
Network Manager is removed because I need lightweight system.
After system starts networks doesn't work.
#service networking status
networking stop/waiting
#service ...
0
votes
1answer
237 views
What does the field `Memory` mean in `ifconfig`?
I find a field Memory in the result of ifconfig command. I am not quite clear about its meaning. By googling, I get some hint from unSpawn's post on this thread that Memory indicate what memory ...
0
votes
1answer
377 views
ifconfig ignores alias on IPv6
When I add an IPv4 address for the interface eth0:0 with ifconfig, it is created correctly:
ifconfig eth0:0 add 192.168.10.10
This can be verified by ifconfig or "ip a".
When I add an IPv6 address ...
0
votes
1answer
1k views
Install Ubuntu, eth0 not detected?
I have installed Ubuntu laptop Toshiba Satellite L640?, and I had difficulty, that is how to enable network interfaces, eth0 was not detected when running ifconfig.
0
votes
1answer
372 views
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 ...
0
votes
1answer
360 views
why do I get a different MAC address using arp and ifconfig?
# ifconfig
eth1 Link encap:Ethernet HWaddr 00:1e:8c:10:xx:xx
# arp
Address HWtype HWaddress Flags Mask Iface
192.xxx.x.x ether ...
0
votes
2answers
1k views
Bash - Trying to figure out route add to mask an IP to a router/gateway
Not even sure if i worded this correctly, but here's what I'm trying to do roughly.
Take an IP such as: 192.168.100.0 and mask it to 255.255.255.0, and set the gateway of that route to another IP ...
0
votes
2answers
1k views
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 ...
0
votes
1answer
673 views
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 ...
0
votes
1answer
5k 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 ...
0
votes
0answers
15 views
Linux: Any distro-independent way to change and persist IP settings?
Are there any distribution-independent mechanisms for tasks like assigning static IP addresses, adding or deleting routes, etc and, then, also be able to persist the changes so made?
AFAIK, each ...
0
votes
0answers
12 views
How can I join a mesh network set up via iw with OSX or Windows?
So I created a series of mesh nodes with iw on Debian via:
iw phy phy0 interface add mesh0 type mp mesh_id meshpoint
ifconfig mesh0 up
ifconfig mesh0 10.10.0.12 netmask 255.255.255.0
How can I ...
0
votes
1answer
68 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 ...
0
votes
1answer
285 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 ...
0
votes
0answers
329 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 ...
0
votes
2answers
473 views
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 ...
0
votes
1answer
88 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 ...
0
votes
0answers
682 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 ...
0
votes
2answers
1k views
Removing a network interface
A software I use get confused if there is irda0 (or some other uncommon device ) in ifconfig -a output.
What is the easiest way of preventing that device from getting listed?
I'm looking for an ...
0
votes
1answer
379 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 ...
0
votes
3answers
95 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 ...
-2
votes
1answer
51 views
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 ...
