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Questions tagged [nic]

NIC stands for a network interface controller (also known as a network interface card, network adapter, LAN adapter and by similar terms). It is a computer hardware component that connects a computer to a computer network.

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Airodump-ng shows no devices

Recently I have downloaded Aircrack. Everything work pretty fine, except airodump-ng. I tried to catch some network communication, so I turned my NIC into monitor mode (by airmon-ng start wlan0). That ...
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Kubuntu 18.04.1 decreasing network speed after some update

On fresh installed system the internet speed approaching the expected values (250/20 Mbit/s). After some update (it is about 1-2 weeks) the download speed lose to ~ 20 Mbit/s. This phenomenon is ...
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wireshark monitor mode ethernet card Ubuntu

I read somewhere that is best to disable all protocols on the capture card to avoid the card itself sending and receiving any traffic, in Windows you can just uncheck all protocols on the card ...
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161 views

Network Card (NIC RTL8111HS) Driver installation 18.04

I just installed Ubuntu Server (Bionic Beaver) on a new PC. It seems like my internet connection does not work at all (pinging Google does not work and the orange LED on the ethernet port lights ...
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216 views

Ubuntu 18.04 PXE-booting with Realtek r8152-based NIC, no interface found

I am upgrading my PXE boot infrastructure with 18.04, but I am running into a consistent problem with our Dell XPSen - when PXE-booting from the official Dell FM76N (Realtek r8152-based) USB NICs, the ...
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My Nic is using two different IPs. I do not want one of them

Recently I changed my network from 192.168.1.0 to 192.168.100.0. My ubuntu desktop seemed to cope well but after a restart, wouldn't get out to the internet, but I could ssh to it and ping it on the ...
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43 views

How to check network bandwidth capacity in my Ubuntu device?

I need to check my ethernets cards network bandwidth capacity. The software instructions gives this command: sudo ethtool eth0 | grep Speed But when I try to run it in Ubuntu, I get this error: ...
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16 views

Why am I unable to use my internal NIC? [duplicate]

This window hangs every single time I try to enable the internal NIC:
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59 views

Cant use various NIC at the same time

Recently I installed an Ubuntu 16.04 version in a PC , where I have 3 different NIC , connected to different networks, the point is that when I have all the three NIC connected and configured only one ...
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31 views

Specify Maximum TCP payload length for packets

I want my TCP packets to have 300 bytes payload atmost. In the other words, packets with more than 300 bytes must chunked to smaller 300 bytes packets. Is there any way to do that? I've tried to set ...
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216 views

RTL8188ee WiFi very slow

I recently bought a tp-link Archer wn781nd for my desktop. The WiFi speed is very slow compared to my laptop. My OS is Ubuntu 16.04 kernel 4.13.0 -41 I had a similar problem when using my laptop ...
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1answer
6k views

How can I create a bond interface in Ubuntu 18.04?

I'm trying to reinstall an Ubuntu server to 18.04. I discovered that 18.04 uses Netplan, and I'm having trouble creating a bond interface using this. Updated configuration: ############# BOND - ...
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1answer
6k views

multiple NICs under ubuntu 18.04

How to translate what we had to do to have 2 independent stream of traffic on 2 or more NIC interfaces with the new netplan.io + systemd-networkd? auto ens2 iface ens2 inet static address 192.168.5....
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disabled NIC on 17.10 - now can't get NIC enabled

I'm an Ubuntu N00b and to be "extra secure" I decided to disable my NIC (on a virtual machine version of Ubunti 17.10) I did quite a bit of searching and trying stuff out with the network adapters ...
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133 views

Ubuntu 17.10 with two NICs: routing requests to correct NIC

I have done a bunch of searches about this, and found a lot of answers that don't quite seem to fit my question. If this question has been answered already, I apologize. My PC has Ubuntu 17.10, and ...
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445 views

Disable NIC offload on boot up/reboot

Trying to disable common nic offload features on boot up/reboot. Created the attached script. Works fine/as expected when run as sudo from command line. Tried executing via rc.local, systemctl ...
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198 views

Same hardware & OS, different network adapter name

I'm currently installing 2 new servers, exactly the same hardware & installation procedure. Both machines have 4 NICs, 2 x 1Gbit and 2 x 10Gbit The 1Gbit ones get a different name and I have no ...
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How to directly connect computers that are also on the same LAN?

Here is the layout of my local network: Client (Running Ubuntu 17.10). Server (Running Ubuntu Server 16.04). Simplified ASCII art of my network: Client~~~~~~~Server | | | ...
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If I have bound two IP address on one NIC, So How can I use both at same time ? Or can I switch to each other?

If I have bound two ip address on same NIC in ubuntu 16.04. So how can I use both either at same time or by switching to each other ?
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195 views

Can't get second NIC to work on Ubuntu Server

I've got Dell t5500 I've re-purposed as a server. It has one ethernet port (enp6so). I added a second NIC to get a second (10 GBE) port (virbr0). It's not plug and play, unfortunately. I can't get ...
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163 views

Wired ethernet connection randomly dropping out on 16.04.3 - can't find workable answer

Having similar issue with wired ethernet randomly dropping out. Sometimes works fine for hours, other times drops out whenever it feels like. Only way I can resolve is to reboot. Network immediately ...
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1answer
2k views

How to create a virtual network interface in Ubuntu?

I'm testing a network program on Ubuntu. Is there any way to create a virtual network interface in Ubuntu. Something like lo is good, but unfortunately there is bunch of packets on lo with 127.0.0.1 ...
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Tap NIC Auto Up on Reboot Issues

I am running Ubuntu 16.04.3 and have 2 NICs, ens160 and ens192. Ens160 is for management and functions fine, however, ens192 is receiving data from a tap. The problem I'm having with ens192 is that it ...
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942 views

How can I change my Mac address permanently!?

I am new to Linux platform. I need to change mac address permanently. I tried various methods. Everything thing works on VMware. But not on my Ubuntu system. Did anyone tried to change and succeed!??
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Network Traffic Spiking

I have recently installed an 10 GBit NIC from Asus, the XG-C100C 10 GBit Network Card, which is connected to a Switch using a 5GBit Link. I am using an AMD Threadripper 1950x with an X399 Aorus ...
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1answer
49 views

Xubuntu 16.04 boots so fast, network not up on-time. Can the test be delayed?

I upgraded my Xubuntu 16.04; removed the SSD disk, installed SSD M2 memory card. Xubuntu now boots in 15sec instead of 40. Unfortunately, the system now boots so fast, the NIC is slower than the boot ...
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644 views

How do I setup multiple static IP's on multiple NIC's with one gateway?

I'm using Ubuntu 16.04.3 LTS. Currently I have this in /etc/network/interfaces auto lo iface lo inet loopback auto eno1 inet static address 198.167.16.164 netmask 255.255.240.0 gateway ...
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233 views

No Eth0 - Unclaimed I350 - Ubuntu 14.04 LTS

Preface: This is my first time on this site asking questions. I have searched for a solution far and wide and have found nothing. I have a 14.04 server that I set up two months ago, no network issues. ...
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1answer
51 views

2 nics each with static IP addresses - how to tell only one to accept inbound

I have 2 nics on my motherboard in a Linux Mint 18 box. I have setup static ip addresses for each nic (100 and 101). I want to address the box by a single hostname from remote machines (which means ...
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1answer
235 views

Internet access when setting 2 NICS using Iptables

I have set 2 NICS on ubntu. One to internet having IP 192.168.1.101, another to LAN having IP 192.168.1.100 , and internet GW is 192.168.1.1 My configuration is as below using Iptables: iptables -A ...
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1answer
13k views

TL-WN722N is not recognized

I'm relatively new to Linux. I'm running Ubuntu GNOME (4.8.0-36-generic) on my laptop (Dell Inspiron 5520 15R). I've bought TP-LINK TL-WN722N usb wireless adapter with Atheros AR9271 chipset but my ...
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222 views

secondary nic pass trough to qemu-kvm

My hardware setup has 2 nics; first nic is for root ubuntu, and I want my secondary nic only accessible by qemu-kvm (bridge for different VM's) without being seen by the host os. I tried everything, ...
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135 views

How to assign two different interface name on the same NIC card (Hardware MAC address)

I am using a Ubuntu Linux system. For my task I have to run some modules by executing the respective scripts. All the modules must run at the same time in the background but all have different ...
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2answers
7k views

how to configure RTL8101/2/6E PCI E to detect link

I have a newly acquired dell notebook that came with a RTL8101/2/6E PCI E Ethernet card installed. After scouring the Internet I can not find any solutions to get it to detect the cat5 cable when ...
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1answer
64 views

How to put NIC on different CPU socket? [closed]

I want NICs in the different sockets, because for now I have NIC on the same CPU socket. Could you help me how to change it? I've attached how it looks like for now:
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Ubuntu 16.04 - cannot re-connect the WiFi network after connection changes

Say my Ubuntu laptop connected to a WiFi network. For some reason I had to restart my wireless router. After the router rebooted successfully, the WiFi network list will not update itself and only ...
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1answer
52 views

3 NICs, one connected to GW, the other two to 1 host each. How to connect hosts?

i'm doing some tests for my class, i have a Ubuntu Server 16.04, totally stock. This server has 3 Ethernet NICs, one of them is connected to my gateway, 192.168.1.1, and the other two are connected ...
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1answer
58 views

How to find out what driver the Ethernet NIC is using?

I have a 10Gbps Ethernet NIC on my Ubuntu box which is named eth0. Is there any way to find out which driver is loaded to work with this NIC?
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1k views

Configuring multiple NIC's via preseeding (Ubuntu Server 16.04)

This question has been previously asked here, but was closed due to be being too localized. Many people on that thread disagreed with the closure and it was never answered. How do I configure two NICs ...
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1answer
438 views

Can bonding two NIC give me double speed on LAN?

I have three PC, named A, B, S. A have one NIC 100 Mb/s, B is like A. S have two NIC, each one is 100 Mb/s. I use a 1 Gbs switch. All NICs of A, B, S are connected to switch. Now a write a tool in ...
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334 views

Simulation Network Interface Controller (NIC) for bonding testing in VmWare Ubuntu virtual machine

I have a PC with 1 NIC, running Ubuntu 16.04. I need to test [network bonding][1], which need at least two NICs to test. The syntax is like below: #eth0 is manually configured, and slave to the "...
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2answers
956 views

issue with settingup multiple ipaddresses on ubuntu desktop (v14.04 and v16.04)

I am trying to setup my desktop such that I have multiple IP addresses using a single NIC. First, I tried to do this temporarily using ip, this works fine, however is only temporarily. To try to set ...
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0answers
44 views

Extra NIC extranet IP issues

For the question scroll down past italic font :) A quick recap: Started with FreeBSD but it was a pain to install on Hyper-V environment, then tried with CentOS, easy install but I found ...
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35 views

VMworkstaition NIC 2 no interface name

I have install 15.10 Server Wily with 1 NIC and after installation added additional NIC. But I only see eno16777736. Second NIC not displayed root@maas:/etc/udev/rules.d# lshw -class network *-...
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1answer
1k views

difference between eth0:1 and eth0.1

Is there any difference in eth0:1 and eth0.1. I a little confused with dot and colon notation. Have seen different approaches but appears both work in the same way, but I need some clarification on ...
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1answer
471 views

How can I get the NIC to respond to jumbo packets when MTU is set to 4000

I have a mythbuntu 14.04 server. # uname -a Linux KISE-055 3.16.0-55-generic #74~14.04.1-Ubuntu SMP Tue Nov 17 10:15:59 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux I have the MTU set to 4000 vice 1500 ...
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1answer
884 views

How can I change my wireless card's regulatory domain (Dbm higher than 30)?

For educational purposes we are trying to change the wireless devices txpower higher than domain regulations per country... To operate outside of specific bands or power levels, we know you have to ...
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1answer
578 views

How to rename or change the names of the network interface cards given by the hardware abstraction layer? (Ubuntu 14.04.3)

I created a live system using Systemback in "computer A" and installed it with no problems in "computer B" but the only annoyance is that HAL gave my network interface cards the names eth1 to the ...
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1answer
1k views

How to create multiple VNICs on kvm?

I have installed kvm on ubuntu, and created a virtual machine. I want to create VNIC s on the same. How can i do that.?
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1answer
109 views

Driver change doesn't persist

I want to change my NIC driver to an older version to have wol activate. I'm talking about alx driver. I did this process on debian and after a lot of tries I could get it working and the change ...