hardware (or its representation by software) that connects a computing device (host) to a computer network (net)

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25 views

Restarting all the network in Ubuntu after hibernating

When my Ubuntu 14.04 machine awakes from hibernation, sometimes the network is disable and enabling it does not make it work again. Running sudo service network-manager restart alone does not solve ...
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0answers
10 views

RHEL: add IPv6 default gateway via interface configuration file

I need to configure a default gateway for IPv6 over the interface configuration files in RHEL (6.6). The File is managed by puppet With IPv4 there is this option GATEWAY=[IPv4 address] I've ...
0
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0answers
27 views

Failed to bring up wlan0

I'm running Raspbian on my Raspberry Pi 2. I have bought a wireless dongle, and I would like to configure both the wired and wireless NIC with a static IP. This is the content of my ...
2
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1answer
37 views

what does none in “tun0@none” stand for?

In the output of ip a I just got the lines: 4: tun0@NONE: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 100 What does the NONE in there ...
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0answers
24 views

A lot of br** interfaces

So I'm using this script https://github.com/oblique/create_ap to start a bridged network on my RPi (works pretty good); now, when I start the script, it creates a new br** interface each time: ...
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1answer
25 views

Virtual NIC's in Linux?

How do I create a VNIC interface in linux? What I want to do is create an interface that is linked in some way to a physical interface but functions in its own namespace. I know the physical ...
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1answer
26 views

Tracking Source IP of Dropped Packets

I have a server running CentOS 7 which is showing a considerable amount of RX dropped packets on ifconfig. I believe those may be caused by hardware problems such as faulty cables and connections. ...
1
vote
1answer
64 views

Untagged interface in Linux?

I know how to create a tagged interface in linux using vconfig like eth1.10 which makes it receive and send tagged packets. Is it possible to create an interface which receives and sends untagged ...
3
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1answer
40 views

Force local IP traffic to go through LAN WITHOUT ip address changes

I post this question on serverfault a few days ago but i think it's more accurate here. I know there's some topics about forcing local IP trafic of a Linux machine to go through the LAN (over the ...
2
votes
1answer
42 views

How to figure out which network interface is used by NFS on Solaris 10?

I have a server with 8 network interfaces configured. From it, I share some directories and export nfs mounts to other servers. My question is how do I figure out which of the 8 interfaces is used ...
1
vote
1answer
35 views

How to Connect Different WiFi interfaces : 1 for external 1 for internal

I've built a Wireless Access point using hostapd and udhcpd. I have 2 WiFi dongles, one is used as wlan0 other is used as wlan1, I connected one of them to internet and other is keeping working as an ...
1
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1answer
50 views

What exactly do `/etc/network/interfaces` `up` and `down` commands do?

I am concerned that I may be incorrectly using the up and down interface options in /etc/network/interfaces. I was under the impression that these options were simply executed as a 'hook' after ...
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0answers
19 views

How to statically assign network interfaces to USB Wireless LAN adapters

For this system there are two WLAN USB adapters: One connects as a client always, and the other connects as an AP. I have a script that manages their operation, but in order to do that I need to ...
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0answers
10 views

OracleSolaris 11.2 and DHCP configuration failure

I want to have IP address assigned by DHCP, so I set: % netadm enable -p ncp Automatic It seems that after this the dhcp agent has been initiated, and throwing errors: ip: WARNING: net0 has ...
1
vote
1answer
55 views

Mysterious disappearing static IP address on wifi interface under Debian?

With these lines in \etc\network\interfaces... allow-hotplug wlan0 iface wlan0 inet static address 192.168.8.1 netmask 255.255.255.0 gateway 192.168.8.1 ... the interface comes up about ...
4
votes
2answers
160 views

Bind unix program to specific network interface

Question: How do I launch a program while ensuring that it's network access is bound via a specific network interface? Case: I want to access two distinct machines with the same IP (192.168.1.1), but ...
2
votes
1answer
32 views

Fedora alternative to the post-up command

Does Fedora support something similar to the post-up command (as in Ubuntu) or does it have any other alternative for this command? I want to run a custom script after activating network interface ...
1
vote
1answer
47 views

Why is my nic ethN suddenly called p18pN? [duplicate]

After a reboot my network interface eth1 is now called p18p1 messing up my network setup. What causes this change of name? I'm using Linux 4.0.5 on Ubuntu 15.04.
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0answers
8 views

I wish to move SBC flash image to new board and maintain network interface indexing

I wrote a small php application on a SBC. I created a disk image from the CF card. When I write the image to a new CF and install on a new SBC the interface index numbers (I hope I am stating that ...
0
votes
1answer
26 views

How can I restart a VPN whenever I connect via wireless or 3G/4G?

I need to restart my VPN whenver I connect to the internet via wireless via a HotSpot or through a 3G Modem. How can I restart a VPN whenever I connect via wireless or 3G/4G? My distro is Ubuntu ...
0
votes
1answer
39 views

Modification needs to be done in iptables in case of a bridge between two interfaces is implemented

I have a machine with 2 NICs; eth0 and eth1. Each NIC has an assigned IP address and the traffic between them is controlled using the below script. #!/bin/bash SAT_RECV="192.168.200.0/16" NQ=9 ...
0
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1answer
92 views

No IP address on VMware running centos 7

I just now installed Cent OS 7 on my VMware 8 and I am not able to connect it to a network. I checked the VM network and its mapped to the physical NIC. The same setting work like charm on my CentOS ...
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3answers
172 views

DNS Issue in ubuntu 14.04

I am facing DNS resolving issue sometimes in my Ubuntu 14.04.2 LTS trusty. I have configured my system with network manager to work with static IP assignment. I have also tried by changing DNS server ...
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0answers
29 views

Debian won't accept my network's password during installation

I'm trying to install Debian Jessie on a Toshiba Satellite M45-S331, but I'm stuck on the "Configure the network" step. I successfully installed the firmware for my wireless card, and I am able to ...
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1answer
216 views

CentOS 7 - Rename network interface without rebooting

I'm renaming network interfaces by modifying the files in /etc/sysconfig/network-scripts. eth0 -> nic0 eth1 -> nic1 The content of the the network scripts looks like this, after modification: # ...
2
votes
1answer
40 views

Make OpenVPN restart upon new network connection on systemd

How would you go about making OpenVPN automatically restart upon connecting to a network? The issue is that every time a network connection is lost, or if the computer is booted without a network ...
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0answers
35 views

Installing huawei Linux driver on fedora 20

I want to use huawei e303f data card on fedora 20 32 bit. I have downloaded the Linux huawei driver. But when I try to install it , it pauses for an indefinite period after the line that's reads '1:4 ...
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1answer
60 views

Interfaces, IPTables, Connections, Local Connection - Confused :/

I configured my iptables today and ran into some questions i could not resolve yet. So it would be nice, if someone could verify or answer the following to clarify: Each interface can be configured ...
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2answers
52 views

why do some network cards need to load external firmware?

I have read this question/answer, but I still do not understand why some network cards work perfectly well without any additional firmware, whereas others need to load firmware to work. As a specific ...
0
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1answer
66 views

Forward traffic coming into dummy interface on to another interface(?)

Can I forward traffic coming into a dummy interface on to another interface? Or is it not a real interface at all even? Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot ...
2
votes
1answer
70 views

Set NetworkManager to ignore rfkill

My notebook does not have a hardware button to disable wireless. But NetworkManager and rfkill see wireless as hard blocked. Wicd and iwconfig works well. Is there any way to disable hard block check ...
1
vote
1answer
173 views

Suse 13.2 fails to connect to router

NetworkManager appears to be running, however cannot connect to router. I am in my first days of using a new computer with a then newly loaded opensuse 13.2. The first few days all appeared to ...
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0answers
112 views

Interface doesn't go up with ip link set interface up

Until yesterday, Internet was just fine and I connected without much problems. I then disabled the network interface, trying to understand a little more how to manage these kind of things, issuing ...
2
votes
1answer
31 views

post-up only once after reboot

I need to run a script ONCE the first time the system connects to the internet. So I use post-up in my interface to run the script. However, I only want to run the script once per boot. So if the ...
0
votes
1answer
37 views

WiFi cycle with hostapd

I'm using hostapd to broadcast my wireless network. I'm cycling through a list of config files. I'm able to create a wireless network the first time, but as soon as I'm trying to cycle to the next one ...
4
votes
1answer
98 views

Create a loopback interface and make it permanent (FreeBSD)

I create a loopback interface using: #ifconfig lo1 create The problem is when I reboot the machine I loose my configuration. I tried to modify the /etc/rc.conf file but I didn't figure the right way ...
2
votes
1answer
132 views

Please help me to understand these tun0 addresses

I have already done some searching and more or less understand what a tun0 interface does. I got the following from various sources, Packets sent by an operating system via a tun/tap device are ...
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0answers
68 views

Is there a way to emulate a wireless card in qemu / kvm?

Is there a way to emulate a wireless card in qemu / kvm? Or is there no point to this? Is it considered just another interface?
4
votes
2answers
139 views

How to find out which process keeps tunnel interface(tun) up?

If I create a tun interface with ip tuntap add mode tun command and force it administratively up with ip link set dev tun1 up command, then the interface itself is always "physically" down: ...
2
votes
1answer
56 views

Network UNCLAIMED - Unable to access internet

My Kubuntu was working well until I think a day ago, and suddenly I don't have access to Wi-Fi. I've tried turning on the connection via the Connection editor but the box was grayed out. After looking ...
1
vote
2answers
75 views

What exactly happens in Linux internally when an ethernet cable is connected?

I would like to understand what exactly happens when a cable is being connected to the Ethernet port (assuming dynamic IP addressing): What services are being run and how are they triggered? What ...
1
vote
1answer
319 views

Enable Promiscous mode in CentOS 7

How to enable promiscuous mode on network adapter. I have tried by adding PROMISC=yes in /etc/sysconfig/network-scripts/ifcfg-ensxxx but no effect even after network restart or rebooting the system.
2
votes
1answer
127 views

How do I disable network interfaces from loading at boot without Network Manager?

The machine I'm using has 4 network interfaces, only one of which is currently being used (the other 3 are not plugged in at all). Currently when the machine is restarted it is delayed by a few ...
4
votes
1answer
61 views

Is it possible to set interface name permanently in Raspbian?

I'm using 2 wifi dongles. First one is used to monitor and second one is used to access internet. Even if I changed /etc/udev/rules.d/70-persistent-net.rules as below, at startup sometimes wlan0 ...
3
votes
1answer
547 views

Device eth0 does not seem to be present, delaying initialization

I have cloned a fedora and now trying to configure network interfaces. Every time i am adding a new NIC, it starts with number eth3 (rather eth0). i have tried removing and modifying the ...
0
votes
0answers
30 views

installing r8168 driver in centos 4.8

I have installed cent os 4.8 and I am not able to connect to internet from that system. After searching on the net I found that the system has r8169 driver instead of r8168. Now I am trying to ...
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vote
1answer
176 views

ifconfig not showing ip address under eth0

Usually when I connect my raspberry pi to my laptop using an ethernet cable, the ifconfig command in each computer would show the ipaddress of each computer under eth0. I recently got a new raspberry ...
0
votes
1answer
191 views

Set a local static IP address on a network interface and have it permanent even after restart

I have openSUSE 13.2. My laptop connects to the internet through a WiFi network but I have an embedded device which I need to connect to it through the ethernet interface. It has an IP address of ...
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0answers
54 views

Change of Network Interface using Metrics

I want to achieve dynamic interface change between eth0 and wlan0, one solution I am looking into is to change interface metric. Different than this question, I don't want to make any change to ...
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0answers
61 views

command line tool group chat utility under linux

I am working on mac osx Yosemite. I want to reach to a user under a certain IP address. (It might be local network or thru internet). I want to do it thru terminal using the default tools that ...