Questions tagged [network-interface]

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

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Configuring network namespace for dedicated IP address

I have a Debian 10 system that is connected to a VPN with Wireguard. I want one application – Tor – running as a service to connect directly to the internet and to have its own IP address in my ...
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Why is my Oracle Linux 7.8 server spamming “eth0: bad gso: type: 1” errors?

I have an Oracle Linux 7.8 server with terrible network performance. When I run dmesg, I see that it is spamming "eth0: bad gso: type: 1" errors. I tried disabling gso/tso on the interface,...
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Routing between two interfaces on the same machine

I'm somewhat new to network building and I have encountered an issue while building a small network. I've the following network setup for it: server firewall ...
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Connect to wifi w/out DE and DM

When installing LAMP server, I went for tasksel, and got my DE (Xfce) and seemingly also display manager (LightDM) removed (this is a known "bug", believe it or not). Now I just need to ...
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help with RHEL 7 linux network scripts and interface names

RHEL 7.9, I have a quad port NIC ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127....
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“Cable unplugged”, network issues on Linux Mint dual boot

I have recently bought a new router (D-Link EXO DIR-878 AC1900) and I am now experiencing weird network issues on my dual boot machine (Win 10 / Mint 20). On Windows and all other connected devices ...
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rtl8168 based NIC not detected on Ubuntu 20.04

As the NIC itself is currently not working, I have only limited information as I am not running the system right now. The issue I have is that after a kernel upgrade the NIC stopped working. I saw the ...
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How can I select the network interface for installing a program in linux?

I need to install remotely Omxplayer on a Raspberry Pi. RPi is connected by a LTE modem through PPP0 interface. My RPI is placed another country and I connect to Raspberry through my VPN using SSH. My ...
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Can't change netmask to other than /32 for a Debian virtual machine created on google cloud platform

I have created two virtual machines in google cloud platform both are on the same VPC 10.164.0.0/20. One machine is configure with static IP 10.164.0.2, and the other machine is configure with static ...
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How do you change the netmask?

Is there a command that would let me change the netmask of an IP assigned to an interface ? example : $ ip a show eth4 2: eth4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state ...
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What exactly rx-vlan-filter means on a network interface?

In particular, ethtool -k gives me a line stating that rx-vlan-filter: on [fixed]. How does it affect reception of vlan-tagged packets on raw socket (PF_PACKET, SOCK_RAW)? I am currently diagnosing ...
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How to rename a network interface on NixOS?

How to rename existing interfaces to a standardized names (i.e "internet0", "dmz0", etc). The goal is to use the same names across different configuration.
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Cannot find bridge device with ifupdown

Please note that I am using Void Linux. Here is my /etc/network/interfaces.d/br0 file: auto br0 iface br0 inet dhcp bridge_ports eth0 bridge_stp off bridge_waitport 0 bridge_fd ...
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Linux loses static IP on Ethernet on disonnection

I have a Linux (Ubuntu 20.04) which is running isc-dhcp-server on an ethernet interface. I configured a static IPv4 on the interface with the following lines in /etc/network/interfaces: auto eno1 ...
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Creating a SSH tunnel with bind option and no remote host

I create a SOCKS5 proxy via SSH tunnel as ssh -N -D 8081 -B tun1 user@Remote-IP to use 127.0.0.1:8081 proxy (e.g., in FireFox). However, I do not want to connect to Remote-IP. I just aim to pass the ...
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Hard Blocked In Kali Linux

When I boot up kali linux from virtual box I get no problems. Then when I type: ifconfig in the terminal sometimes my wifi adapter shows up right away and sometimes it doesn't but if it doesn't then I ...
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How to set up a bridge interface, add eth0 to it, and have internet connection

I am trying to set up br0 with eth0 and veth1 on a headless server where I am logged in via ssh. I am doing this as a preparation to run a systemd service in a special namespace. This namespace will ...
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What network services are restarted when a PC is shutdown?

I am running Linux Mint and if I switch from a wireless connection to a wired connection, then I am unable to connect to the internet. It will give me the notification that I'm wired to a network, but ...
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systemd isolate service that binds to loopback address

I run a number of services that I run on my own server that I put behind a reverse proxy for authentication. However a number of the services only support listening to localhost for a non-public ...
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Only lo interface in /etc/netplan Ubuntu 20.04

I build a PC with a Gigabyte GA-MA790XT-UD4P motherboard. And i installed Ubuntu 20.04 as OS. But i realized i was not connected to the internet. Until suddenly i saw that my Ubuntu machine only has ...
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dmesg + how to know if we need to update the network driver

We have 326 linux servers in our Hadoop cluster. All servers are rhel 7.2, and linux kernel version is 514.26.2.e17.x86_64. We notice the following message from dmesg (kernel massages): 140e the ...
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eth0 network card cannot be detected after I purge pcscd libpcsclite1

I am on ubuntu 18.04 and I ran into a strange situation: After I execute sudo apt-get purge pcscd and sudo apt-get purge libpcsclite1: john@home:~/$ sudo apt-get purge pcscd Reading package lists... ...
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Ubuntu 20.04 iwlist scanning : [interface] Interface doesn't support scanning : Operation not supported

I'm using ubuntu 20.04 (LTS). I can't scan networks with iwlist. $ sudo airmon-ng PHY Interface Driver Chipset phy0 wlp1s0 ath10k_pci Qualcomm Atheros QCA9377 802.11ac Wireless ...
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SNMP Support in Linux for IF-MIB

I am trying to setup an SNMP agent in my Linux Box. I installed net-snmp and did some basic config. However while performing snmpget,snmpwalk operations. I am able to get the outputs for only system ...
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Unpredictable predictable network names

I have a machine that I believe I originally set up with Debian 8. Because I didn't understand predictable network names (nor do I now) I changed the names to eth0, eth1, eth2. The renaming is done in ...
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DNS and Internet connection broke after uninstalling docker

I've been having a brutal issue with connecting to the internet on my debian stretch computer. The weirdest thing is that every time I start my computer in able to connect to websites (google or ...
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Internal wifi card (BCM43142, Ubuntu 20.04) stopped seeing my home wifi network

This is a strange one, just like the title says one day I woke up, turned on my computer(Dell Inspiron 3521, Ubuntu 20.04) everything was as usual, except the computer didn't connect to the internet. ...
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Pass traffic from one network interface to another

I have a project where I have 4x RPiZ plugged into a single RPi4. The RPiZs appear as Ethernet over USB devices as network interfaces ethpi1, ethpi2, ethpi3, and ethpi4 with IP addresses 10.0.11.2, 10....
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run a script after a binary was called

I would like to modify iptables after VPN connection. What is the best approach to achieve that ? I already tried through systemd with a custom unit in NetworkManager dispatcher.d directory but it ...
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Changing MAC address in udev and KERNEL==“eth*”

I have a server with ubuntu on it and everything work fine.All network interfaces are working. I decide to move the drive to a new server and it boots to the OS without issue. The network interfaces ...
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Specify SSID for option wifi.cloned-mac-address=random in NetworkManager

As from title, how to set an specify ssid for option wifi.cloned-mac-address in NetworkManager.con for ignore? Thanks
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Ubutntu always freezes when I try to turn on Monitor Mode…Please Help!

Ubuntu freezes and everything stops working when I try to set my wifi into monitor mode. ifconfig wlo1 down iwconfig wlo1 mode monitor ifconfig wlo1 up This is the way I am turning the monitor mode ...
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Auto config dhcp and allow-hotplug to all network interfaces

Lets suppose I have a debian system with 2 network interfaces which comes up with names ens3 and ens4. For the following I have the configuration in the /etc/network/interfaces files as follows, allow-...
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Intel I350 NIC randomly switches off Ethernet ports until system reboot on Ubuntu 20.04

I have a Dell PowerEdge R620 with Ubuntu 20.04 LTS installed. This system features an Intel I350 NIC. This card had 4 Ethernet ports. After boot or when normally running, I can plug an Ethernet cable ...
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Linux wifi hardware that supports many managed interfaces

I need to aquire hardware (can be a wifi card or a router) that is capable of simulating many wifi stations on one wifi radio. Something similar to this (from arch linux wiki): $ iw list Wiphy phy1 .....
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cant connect tap interface with eth

I wrote a simple c program which can send and receive ether net frames using /dev/net/tun and I connected the tap interface with my ethernet nic using both the virtual bridge and veth pair. I expected ...
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Bridge and VLAN bridge with same IP

I enabled VLAN bridge filtering and configured it like this: br-lan 10 PVID Egress Untagged 20 wlan0.0 10 PVID Egress Untagged wlan0.1 20 PVID Egress Untagged wlan0.0 and wlan0.1 are ...
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ifconfig vs iproute2: alias and?

If below config is called alias auto eth1 address 10.255.255.1/24 auto eth1:0 address 10.0.0.1/24 how iproute2 configuration with secondary ip address is called? auto eth1 address 10.255.255.1/24 ...
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Dell Latitude 5411 - CentOS 7 NIC driver not found

Have you all had any success installing Centos 7 on a Dell Latitude 5411 and getting it to recognize the NIC? For us, it will not recognize the NIC from the CentOS-7-x86_64-DVD-2009.iso. If we hook ...
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One VM[VMware] can ping second VM[on Oracle VM], but second[Oracle] could not ping first VM[VMware]

all! I tried to create to opposite VM's on different softwares. First VM (Centos 8) i create on Oracle VM, second one on VMware (Centos, too). Machine on ORACLE VM: In network settings on Oracle VM i ...
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Neighbour advertisement messages not coming from sub interface linux

I created a macvlan interface with eth0 as the parent interface. I can see NS for eth0 and NA msgs from eth0 but not for macvlan interface. However when I ping the gateway from macvlan, then NS msgs ...
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How to send a traffic from Linux machine A to linux Machine C Via Linux Machine B, when all linux machine are in same network?

I have 3 VMs A,B and C which are running on Ubuntu. Those VMs are connected like follows :- A (eth0/10.1.1.10) <------>(eth0/10.1.1.20)B(eth1/10.1.1.30)<------------>(eth0/10.1.1.40)C ...
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Is there a way to change network interface without rebooting the operating system AND disconnecting the network?

I understand that in order to change the espn0 to eth0 without rebooting, I could do the following with script: #!/bin/bash ip link set espn0 down ip link set espn0 name eth0 ip link set eth0 up It ...
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P-t-P and Mask on tun interface (device)

Sorry having to raise a new thread as I cannot comment on existing one: Uunderstanding tun0 addresses The answer to Q2 there isn't clear to me. Could anyone please explain what exactly the Mask ...
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What steps must be taken to manually setup a shared internet connection?

I am looking to find out exactly what steps must be taken to manually provision a shared internet connection on a workstation running a Linux based operating system. I am aware that when using any ...
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Debian 10 renamed network interface and vlan

I discovered that renamed interface by file /etc/systemd/network/10-unifi.link [Match] MACAddress=da:38: [Link] Name=unifi` and configured with vlan in interfaces auto unifi unifi.33 allow-...
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Unable to connect via SSH to when eth0 is disconnected

I've seen a few similar questions, to this one, but have not found a solution. I'm working on a Raspberry Pi and wiring up a second Ethernet port (ultimately it will be the only port on a Pi Zero, ...
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WiFi adapter is delaying packets when low throughput

I was testing a WebSocket connection when I noticed jitter; some TCP packets were getting delayed. So I started pinging the destination. The TCP packets were no longer getting delayed. I stopped ...
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Issue with dummy network interface

I have a VPS which i need to add a virtual dummy adapter to it to hold a local ip which is a requirment for a software i built. i have created the needed files which were the dummy.conf and the ifcfg-...
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How many services are listening on the target system on all interfaces? (Not on localhost and IPv4 only)

I need to find out how many services are listening to my interfaces (ipv4 only, not localhost) $ ifconfig ens192: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.129.56.137 ...

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