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

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Wifi not working and interface not listed

I installed Chromium OS on a USB stick, and can't get wifi to work. It looks like the interface is missing. Here is the output of some commands: localhost / # ifconfig -a lo: ...
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1answer
19 views

How to disable interface just for NetworkManager in Kali Linux?

I have two WLAN interfaces, and I want to disable one of them for NetworkManager, so that if I run something like service network-manager stop, all the interfaces should stop except on of the WLAN ...
2
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1answer
40 views

Network interface crashes after disconnecting eth wire or restarting service

At startup or reboot, network interface works fine. Host is reachable and also can communicate with other devices on the local net or internet. IP address is configured as static, and dns-nameservers ...
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0answers
15 views

Systemd and controlling network settings

I'm trying to figure out best way to control network settings in best way possible in real time. My current plan is this: Start ip -s -d -o monitor with systemd and write its output to file ...
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0answers
14 views

WiFi card disappears after reboot, but not after cold boot

I have an Arch-based server (Zotac Nano, AMD Kabini-based) which doubles as WiFi access point using a miniPCI Atheros WiFi card. If I start it form cold boot (as in “it was off”), then everything ...
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1answer
86 views

Ubuntu 16.04: How is the bonding kernel module gettting loaded automatically?

I recently set up an Ubuntu 16.04 system with a bonded ethernet configuration. Previously, it appears that to get this to work the bonding module needed to be included in /etc/modules or ...
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1answer
31 views

Set an IP in Centos for access in SSH when connected through WiFi

I recently installed CentOS 7 on Virtual Box with a minimal installation, and I have enabled the network interface in order to show my IP and access to it through SSH when connected by an Ethernet ...
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24 views

ubuntu 14.04 create route to multicast stream server and have access udp://239.255.0.169:5500

My server is ubuntu 14.04 server edition and I am trying to re stream existed multicast stream by my server : Multicast stream server is using udp://239.255.0.169:5500 destination ip. On my side I ...
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19 views

Cannot connect to WiFi network using /etc/network/interfaces

I'm trying to connect to a WEP WiFi network using only the /etc/network/interfaces file: auto lo iface lo inet loopback auto wlan0 iface wlan0 inet dhcp wireless-essid mySSID wireless-key ...
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0answers
32 views

Static ip definition for wlan0 not working

I am setting up a web server on my raspberry pi. I want to connect it to my router via ethernet (static ip) but if the ethernet is disconnected I want it to automatically start using the wifi (static ...
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1answer
31 views

How to determine if it is a fault of the Network Card?

Basically, I have a PC having problems. Let's call it POO. POO is a pc running Gentoo Linux, with KDE. It is quite freshly setup on an old hardware. So far I do not notice it has other problems, ...
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2answers
20 views

ping gateway but not domain

I can ping gateway its ok but when I try ping google.com response is; "unknown host google.com" network-scripts/ifcfg-ens0p3 file content: TYPE="Ethernet" BOOTPROTO="static" IPADDR="192.168.0.14" ...
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1answer
14 views

virtual monitoring interface on wifi card

I only have one wifi nic in my computer, but I want to be able to monitor all traffic while still connecting to a network. I was thinking (if it is possible) to have a physical interface wlan0 ...
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0answers
89 views

Kali Linux Rolling Alfa NHA wireless Error -22, Kali in Virtual Box (host Kali) Live Mode

Hi Ive just purchased an Alfa AWUS036NHA wireless USB wireless Adapter. I have also just upgraded the installed Kali 2.0 Sana on my hard drive to the new Kali rolling. There seems to be issues ...
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0answers
91 views

Wifi interface recognized as ethernet

I am having trouble setting up my wifi configuration persistently. I have tried both netctl and NetworkManager and both only work after manual setup. What I find especially weird is that ip link ...
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1answer
32 views

Is there a portable way to get the name of the WiFi card on the command line without additional parsing?

In this tool, the name of the wireless interface is hardcoded to be wlan0. This was a reasonable assumption up through Ubuntu 14.04, but the wireless interface name appears to have changed in Ubuntu ...
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1answer
20 views

How can I find out the ownership of a tap interface?

I can set up a persistent Linux tap interface and make it owned by a specific user and group with one of these: tunctl -u someuser -g somegroup -t example.tap ip tuntap add dev example.tap mode tap ...
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3answers
56 views

How to check which network interface is active and providing internet?

ip link show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eno1: ...
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1answer
51 views

unable to SSH to eth1 after bringing down eth0

I have a remote machine with 2 interfaces: eth0 and eth1. I am able to ssh using eth0 ip address as well as eth1 ip addr. However, things go strange once I bring down eth0 using the command ifdown ...
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1answer
33 views

Ubuntu Server 15.10 doesn't recognize internet card

I just installed ubuntu server (the installer connected to the internet with no troubles), and I cannot get it to connect wirelessly to the internet. I've googled to no avail, as there is no ethX ...
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2answers
51 views

How to use same interfaces settings for all wlan devices

I am working with a pcengines apu2c4 board with debian 8.4 installed.I am quite new to Linux. We use edimax ew-7811un usb wifi adapters. Obviously when you insert a wifi dongle new to the machine it ...
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1answer
17 views

Are IPv6 link-local addresses assigned by the kernel or by a userspace program

When IPv6 is enabled for an interface, it will get a link-local address assigned automatically based on the MAC of the network interface. But who assigns this address? Is it done in the kernel, or by ...
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1answer
25 views

Route specific traffic to specific interface

I have two NICs. Basically, I want to use one of them for specific traffic (based on the destination IP or the domain) and the second one for the rest of the trafic. Is this possible? If it is, How ...
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0answers
17 views

Why the virtual interface is down when I establish a layer-3 SSH VPN using “tun” devices

I would like to establish a layer-3 SSH VPN on Ubuntu 14.04. To create a tun virtual device, I used the command ssh -f -w 0:0 root@41.33.17.26 -p 2010 true, it creates the interface 'tun0' but the ...
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1answer
37 views

Programmatically determine the IRQs associated with a network interface

What is the most reliable way to programmatically determine the IRQs associated with a network interface, given the name of the interface (e.g. eth0)? I'm okay with a best-effort approach, but I'd ...
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29 views

Userspace Network Stack

I am writing a (very simple) userland IP network stack. For this purpose, I need to go "around" the OS network stack and obtain the raw Ethernet frames. The tap interface sounds like a way to go, but ...
2
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1answer
45 views

Why are my if-up.d scripts running before DHCP(v6) has completed?

I'm using DHCP and have both IPv4 and IPv6. I want to run a script that updates an IPv6 DDNS service when my network is configured. I created a script at /etc/network/if-up.d/update_dns however this ...
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0answers
55 views

Broadcom BCM94352HMB wifi card not working

As mentioned above, I got an BCM94352HMB wifi card in my laptop but it does not work (it's not recognized) under pretty new linux kernels (arch linux). So does somebody know if there is support for ...
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0answers
12 views

Ubuntu: Wifi access point clients constanlty reconnect to AP

I did on my Ubuntu 14 LTS PC WiFi access point using this how-to https://www.quora.com/How-do-I-create-hotspots-in-Ubuntu-14-04 . So from clients I can use internet but the connection is very slow. ...
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2answers
56 views

Ubuntu: I cannot reach internet

I'm trying to install nodejs on my Ubuntu server but it seems not to be able to reach the internet. My server has two network interfaces: eth0 connected to my network eth1 used sometimes to be ...
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1answer
45 views

Flapping Ethernet connection of Fedora 23

Since a few days I am experiencing a flapping Ethernet connection on my Fedora 23 laptop: the network connection goes down for several seconds every minute. The machine is up-to-date with the latest ...
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2answers
139 views

driver for Ralink USB RT2870 --> 148f:7601

I bought the Ralink USB Network Interface device listed below $lsusb Bus 004 Device 002: ID 148f:7601 Ralink Technology, Corp. And I've looked at many threads which all point to the same chipset ...
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0answers
22 views

'ip netns exec' command execution using nsid obtained from 'ip netns list-id'

I have previously used ip netns exec command to modify netns interfaces. But if there is no name associated with a netns (eg: docker), how can I use nsid result of ip netns list-id command for ...
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0answers
49 views

Alfa Network Atheros AR9271 not works under Debian

I'm trying to use the Alfa network Atheros AR9271 but not works, when I execute the following command lsusb I got: Bus 001 Device 035: ID 0cf3:9271 Atheros Communications, Inc. AR9271 802.11n I ...
3
votes
2answers
121 views

(Raspian) DHCP startup race conditions - lots of service failures at startup (no DNS for ~5-10 seconds)

(Edit: This applies to much more than postfix; it's just where I noticed/debugged it) I've installed postfix, but when it starts up and creates its chroot, it gets an empty copy of /etc/resolv.conf ...
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0answers
16 views

Why does `ping -M do -s 8000` still work between hosts with different MTU values?

I have two hosts: alice (192.168.0.1, mtu 9000) bob (192.168.0.2, mtu 1500) They are directly connected with a cat 6 cable, with no switch in between. Why is it that I can still ping bob from ...
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0answers
30 views

ip link up with empty line

case: # eth0.cfg The primary network interface auto eth0 iface eth0 inet static address IP-1 netmask 255.255.255.255 broadcast IP-1 post-up ip addr add 192.168.100.254/24 dev ...
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1answer
38 views

Where to look for systemd-networkd device names?

I'm running Debian Jessie/8.2 on an ARM single board computer with systemd. I'd like to entertain using systemd-networkd instead of the ifup mechanisms. One of the apparent steps, is to figure out the ...
0
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1answer
55 views

Setting static ip address for multiple ethernet controller

I have a simple question for which I couldn't find a answer for hours on the internet. I didn't think it's so much special what I want to do, but it seems to be. I have Debian virtual machine within ...
3
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0answers
46 views

Linux + why dropping issue displayed from ifconfig but not from ethtool?

we have Linux VM red hat 7.2 version with two LAN interfaces the Linux machines are ruining on ESXi - 5.5.0 and we have very strange issue , the conflict is between the ifconfig command to ethtool ...
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2answers
54 views

Retrieve name of the active network interface only [duplicate]

How can I retrieve from the command line (or a shell script) only the name of the active network interface, in Linux? If there are several active interfaces, I want just one (selected arbitrarily).
4
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1answer
108 views

How to determine the logical type of a linux network device

with logical I mean everything legal in the command ip link as in, for instance: ip link add link dum0 name dum0.200 type vlan protocol 802.1Q id 200 where the logical type would be "vlan". All ...
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0answers
112 views

A way to setup hotspot in Kali Sana (Kali 2.0) via XFCE

I'm finding it extremely difficult to figure out to create a successful hotspot using Kali Sana after having it updated to XFCE, installing all updates via apt-get install update. I've tested the ...
0
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1answer
138 views

Routing Problem with IP Forwarding on Ubuntu 14.04 and VirtualBox

I'm not entirely sure how to best title this question as the set up is a little complicated... but basically I have a routing problem with IP forwarding on my ubuntu server. On my ubuntu server (an ...
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0answers
60 views

Linux Packet Drops Increasing Over Time

I have Linux machine red-hat version 7.1 ( VM machine ) I see that dropped value increase every second!!! Please advice how to find the problem , and if red-hat 7.1 need some patch update in order ...
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1answer
103 views

Installing Netis WF2190 driver on Ubuntu 14.04 w/ kernel 4.2.0-27-generic gives me an error: implicit declaration of function ‘strnicmp’

Linux # lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.4 LTS Release: 14.04 Codename: trusty uname # uname -a Linux qb123 4.2.0-27-generic ...
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0answers
37 views

CJDNS `Network is unreachable`

I'm not shure if this question belongs here, but anyway. I was trying to run cjdns on my android phone (OnePlus One runnig CyanogenMod 13) (actually tried on several devices), but it ain't working. It ...
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0answers
42 views

Red Hat vNIC(Virtual NIC) association to physical NIC

I have a virtual network interface named bond0.700 connected to a vlan (ID 700), and 6 physical NIC (eth0 to 5) on RHEL 5.5. Hint : [root@rhle ~]$ cd /sys/devices/virtual/net [root@rhle net]$ ls ...
0
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1answer
79 views

CentOS “service network restart” FAILED - where is the error log?

In CentOS, I ran the following command. But it doesn't give me explicit errors to investigate. How can I troubleshoot further or find the errors? service network restart
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16 views

Is there a tool or a command to change the “tagtype” from VLAN tags (single and double tag) before sending the frame over a VLAN Interface?

I have to talk to a device in a VLAN network. It requires that the tagtype field of both VLAN tags are the value 9100 or it refuses to answer. Thanks