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

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Ip Forwarding: wlan0 <=> eth0: without NetworkManager?

I enabled ip-forwarding between my interfaces wlan0 and eth0 : in /etc/sysctl.conf sh "echo 1 > proc/etc..." 3 iptables rules. IpTables rules: sudo iptables -t nat -A POSTROUTING -o eth0 ...
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1answer
16 views

inet address not being assigned in /etc/network/interfaces

I am running raspbian and have plugged in two wifi usb dongles. In my /etc/network/interfaces I have assigned them both ip address. ... iface wlan0 inet static address 192.168.2.100 ...
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1answer
27 views

Subnet Issue - Multiple instances match the same subnet

I have my /etc/network/interfaces file configured as the following auto lo iface lo inet loopback iface eth0 inet static address 192.168.1.100 netmask 255.255.255.0 gateway ...
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14 views

Is the ordering of blocks within /etc/network/interfaces important? if so why?

I am using raspbian and have came accross a problem when using isc-dhcp-server . The problem seems to arrise when I change the ordering of the blocks within my etc/network/interfaces file For ...
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11 views

isc-dhcp-server conflicting with /etc/network/interfaces - Multiple instances match the same subnet

I am running Raspbian and trying to run cmd service isc-dhcp-server start. This returns the msg [FAIL] Starting ISC DHCP server: dhcpd[....] check syslog for diagnostics. ... failed! my ...
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1answer
16 views

WLAN & Debian based Linux distros: Soft-enable WLan by default

It seems Debian based Linux's have wlan soft-blocked by default. I verify it on my Linux Mint laptop: even if you rfkill unblock all interfaces (in rc.local or in a service...): 2 seconds after boot ...
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2answers
48 views

Putting network interface in promiscuous mode (not monitor mode)

I'm looking to capture Wifi request probes while still associated with a network and otherwise not affecting that connection. I can successfully enable monitor mode but, of course, can't join ...
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12 views

cannot ping nodes on same ad-hoc network with certain adapters

I'm setting up an ad-hoc network made mostly of Raspberry Pis and I'm running into a problem where nodes using certain wireless adapter cards cannot interact with other nodes on the network. I know ...
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30 views

Convert vnstat log file to csv

My goal is to log daily network activity (rx/tx) from each ethernet interface. I installed vnstat, and while it reports daily and monthly stats, it doesn't offer a nice way to convert to csv to ...
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1answer
39 views

How to use network interface as non-root user on Android? [closed]

I want to communicate between my Android device and my Linux box over IP through the USB network interface mode. I have connected my Android device to my Linux box with and put the Android device ...
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0answers
21 views

How to permanently update /run/network/ifstate [closed]

I had a system (ubuntu server 14.04) installed on a machine with only 1 NIC. I moved the hard drive to one where there is two. I can properly configure my network, but each time I edit ...
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11 views

Can i use single Gateway with multipal /2 lan card in linux 5.2

i have two interface eth0 and eth1 in same network eth0 ip : 192.168.10.10 gateway : 192.168.10.5 eth1 IP : 192.168.10.11 can i use same gateway : 192.168.10.5 for eth1 i am able to ping only ...
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0answers
16 views

Server network connectivity problem

I have a server (RH6 x86_64) that is pingable from a remote host but does not allow ssh. On the server the ssh and network service statuses are both up however the server gets no response when pinging ...
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1answer
11 views

Relation between Interface Speed and Processing times

i have a question regarding processing time delays, i want to know is there a relation between the rate of data packets received and their processing time at the receiving host or is the processing ...
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2answers
28 views

How to use routing to use the next available inetface

My system has 2 interfaces (eth0, eth1). I open a socket and bind it with an ip attached to eth0, now I want the OS to route the packets to another ip (which attached to eth1 but i'm not sure it's ...
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1answer
47 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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19 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 ...
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0answers
79 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 ...
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1answer
64 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
29 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
36 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
30 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. ...
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1answer
72 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 ...
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1answer
53 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 ...
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1answer
52 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 ...
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1answer
36 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 ...
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1answer
51 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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25 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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13 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 ...
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1answer
74 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 ...
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2answers
248 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 ...
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1answer
33 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 ...
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1answer
67 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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11 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
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1answer
36 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 ...
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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 ...
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1answer
149 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
251 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
35 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
467 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: # ...
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1answer
44 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
48 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
64 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
57 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 ...
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1answer
85 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 ...
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1answer
92 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 ...
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1answer
291 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
173 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
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1answer
33 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 ...
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1answer
59 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 ...