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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SOLVED - Debian 11: Mr. Unconnectable

I solved it; I thank the community for that. But I'll delete this question, because I don't like the idea of people changing my words. Thanks.
1 vote
1 answer
29 views

How to reset status of a network adapter before assigning the name in a udev ruleset?

Part 4 of the problem with the usb3 nic interfaces after debian 6.1.0-20 kernel update. See the other posts here: Debian 12 - All of sudden my USB3 Lan adapter get assigned random mac address each ...
0 votes
1 answer
16 views

Use usb path of an usb nic address in udev rules in order to assign an interface name instead of mac address

Related to: Debian 12 - All of sudden my USB3 Lan adapter get assigned random mac address each reboot Use parrent attribute "serial" in UDEV configuration to assign lan interface another ...
1 vote
1 answer
38 views

Use parrent attribute "serial" in UDEV configuration to assign lan interface another name instead of relying on the mac address

Given this kernel problem awaiting to be fixed and that randomly assign mac address to this usb3 lan adapters: Debian 12 - All of sudden my USB3 Lan adapter get assigned random mac address each reboot ...
0 votes
1 answer
3k views

Ethernet Interfaces missing in RHEL 8

Earlier there was nothing in Network-scripts directory, but after installing network-scripts from ISO almost all files came and network interfaces went missing in RHEL 8 VM. Network interfaces ...
2 votes
2 answers
3k views

How to automatically change DNS nameserver

My ISP's DNS server has problems resolving lots of important websites like google, github, gmail etc. As a hack I manually edited the /etc/resolv.conf file to Google's 8.8.8.8. But the changed file ...
5 votes
1 answer
9k views

Debian 11/12 rename network interfaces

I spent a lot of time to correctly rename the network interfaces to Debian 11, since I had to collect information in fact bit by bit, I decided to create this question. Task: Rename ens86f[0-3] to ...
0 votes
0 answers
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Virtual interface pair forwarding packets to each other

The goal is very simple: anything sent to pair1, as outgoing packet, should appear on pair0 as an incoming packet and vice versa. I am thinking on a layer3-only, virtual interface now. tun could do ...
2 votes
1 answer
2k views

Error with the wifi and the network manager in the Deepin launcher

I have a very strange error, it turns out that my Wi-Fi interface is not being managed by the Wi-Fi icon of my launcher in Deepin 15.5. It does not show me other Wi-Fi networks nearby, however the ...
1 vote
1 answer
92 views

docker complain I have a bridge name conflict with a invisible network

When I reboot machine disabled the docker.service, I do not have br1 in my ip a output. However, after start docker, the br1 appears. But sudo docker network inspect does not show any related network. ...
3 votes
1 answer
86 views

Why is my WiFi is always hard-blocked on my HP Pavilion G6?

I wish you could help me with this matter which is WiFi hard blocked in my Linux machine and can't get the WiFi up. My device is an HP Pavilion G6 and WiFi card is Ralink 5390; the default of the ...
1 vote
0 answers
24 views

Is it possible to configure Ethertype DSA VLAN tagging on an Ethernet port that has a real PHY connection to the outside world?

I am working on an embedded system that will connect a processor running Linux to an Ethernet switch via a "conduit" Ethernet link (e.g. eth0) using the port-based Ethertype DSA (Marvell) ...
3 votes
1 answer
32 views

Which is My Static IPv6 Interface Identifier?

I've been accustomed to IPv4 for so long and I'm really unfamiliar with IPv6. I recently wanted to add a firewall rule to my OpenWRT router to allow inbound IPv6 connection to a certain port of my ...
0 votes
1 answer
2k views

Needing to reboot after adding/removing same gateway route

As a matter of study I'm using VirtualBox with Debian 8 to learn basics of networking with the interface in bridge mode. I deactivated dhcp of my network interface eth0 on /etc/network/interfaces: # ...
2 votes
1 answer
4k views

QEMU VM has no IP

I tried to run a VM on QEMU, but the VM is up without an IP address associated with eth0. I configured the bridge and tap interface on the host, and I can see that: brctl show bro bridge name ...
6 votes
2 answers
2k 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 ...
6 votes
3 answers
12k 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 ...
0 votes
1 answer
2k 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 ...
0 votes
1 answer
4k views

Add .ucode driver in Debian installer

When I install Debian, installer request network connection. But Debian can't found my Ethernet card (Intel(R) Dual Band Wireless-AC 8260). I use non-free installer and try put .ucode file in /...
0 votes
1 answer
54 views

How to deterministically vary the delay in programs like netem?

I am trying to set up a network scenario in which there is a variable delay between two nodes. Netem allows to set up a fixed delay and add a jitter according to some probabilistic distribution. ...
3 votes
2 answers
104 views

How does the Linux Kernel store hardware TX and RX filter modes?

I am working on a C program which gets the timestamping information for a given network interface, like my own version of ethtool. My goal is to get the information printed by $ ethtool -T myNetIf. ...
0 votes
0 answers
17 views

Configure BFD OSPF (FRR 3.0.4)

I installed an old version of FRR (v. 3.0.4) and can't figure out why ospf bfd is not working. How to turn it on correctly? I couldn't find user guide documentation for old version of FRR. ...
3 votes
1 answer
3k views

Route incoming traffic on openVPN server to client

I have a VPS with a public IP that is running OpenVPN and a local server that is the only VPN client on this. Is it possible to route incoming traffic on lets say port 80 to the client? My local ...
0 votes
3 answers
4k views

MT7902 driver for Ubuntu

I recently purchased a laptop from Asus (Asus X1504VA) and installed Ubuntu 22.04.3 LTS on it.  But I'm having trouble with the Wi-Fi adapter. Specs are follows: Laptop model: Asus X1504VA OS: Ubuntu ...
1 vote
1 answer
10 views

Trying to conifugre bridge on GRE interface, facing issue

I have created an ipv6 tunnel by using the following commands: ip link add gre_test type ip6gre remote 2001:4860:4860::8888 local ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff ttl 255 removed actual ipv6 ...
5 votes
1 answer
11k views

How can I find active network interface from userland?

I know that I can find which network interface is currently being used by parsing the output of: # ifconfig or # route But how can I get this information as a non-root user? Is there a way I can ...
1 vote
2 answers
94 views

Machine MAC address with Ubuntu on top of WSL2

Running Ubuntu 22.04.3 LTS on top of WSL2 Output of ifconfig: eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1492 inet 172.28.193.11 netmask 255.255.240.0 broadcast 172.28.207.255 ...
3 votes
1 answer
2k views

"ndd" equivalent of "ethtool" on Solaris

I've to restore a large file from a NAS backup on Solaris 10 ZFS. I'm using this following command: rsync -av [email protected]:from/NAS/files/system to/solaris/files/system And I've got this ...
2 votes
0 answers
126 views

Predictable network interface names with BusyBox

I want to map each hardware NIC to a specific linux network interface (ethX) persistently, as currently when an ethernet cable is reconnected, it picks an interface seemingly at random. This is ...
0 votes
0 answers
7 views

Routing Rx and Tx traffic to/from a port on separate interfaces

I have a Guest OS that looks sort of like this: Host OS Guest OS Intranet --- eth0 -------|--- eth0 / eth1_in <--|--< eth1 <--\ <some app> | ...
0 votes
0 answers
25 views

Is it correct to physically remove a PCI-E device after 'removing' it via sysfs?

Sometimes I have to replace a PCI Express device, for example a network card (NIC) on a Linux server. I was always wondering if it is possible to do without downtime. I had success with adding new ...
3 votes
2 answers
3k views

Enabling networking in a systemd-nspawn container

I'm trying to setup container that has access to the internet but have been unsuccessful so far. # sudo systemd-nspawn -nb -M debian-tree # systemctl enable --now systemd-networkd systemd-resolved # ...
0 votes
1 answer
5k views

How to read iw allowed interface lists?

I wanted to set up promiscuous Wi-Fi monitoring into Wireshark. Tried to do it like I used to with iwconfig, but this system sets me back to managed as soon as I bring the interface back up. I see ...
0 votes
0 answers
20 views

how to get network interfaces in linux of my docker containers

i launch some docker nginx containers liket that : docker run --rm -d nginx docker run --rm -d nginx docker run --rm -d nginx then i get the ip adresses of my containers, by doing.. docker inspect ...
0 votes
2 answers
342 views

Is there a way to find the original network interface name of a udev-renamed interface?

When I run ip addr show, this will show an interface being named enp3s0f0 or similar. This name is assigned by udev. This happens after mounting the / drive. Thus it happens after luks file encryption....
0 votes
1 answer
98 views

Connect IPSEC VPN to network interface

I have a StrongSwan IPSEC VPN configured on my Ubuntu 22.04.4 LTS server. The VPN starts up and connects to the primary interface (eno1) successfully. Using qBittorrent, I bind to the IP Address that ...
2 votes
0 answers
36 views

Prevent process from performing network scan

On a linux 20.04 LTS, I'm trying to stop a process from entering promiscuous mode and/or from scanning my network. To be more specific, I'll have to install LsAgent from LANSWEEPER in a company's ...
0 votes
0 answers
14 views

How to find out, which network device is created by an USB port?

I see a networking device in the USB bus: lsusb shows it well and it looks working well. As a network device, it also generates a network interface. Yes, ip link ls shows them, and some of them is ...
0 votes
1 answer
2k views

ifconfig-changes not saved after reboot - In CENTOS ssh? <Red Hat>

I configured manually the eno2 interface with static ip and ifconfig file for that eno2 configuration is : (vi /etc/sysconfig/network-scripts/ifcfg-eno2 ) < Red Hat > TYPE=Ethernet PROXY_MODE=...
1 vote
0 answers
17 views

USBGuard issue with Realtek NIC on Dell Tablet and Docking Station

I am facing an issue with a Dell Tablet running RHEL 8.9 and utilizing a non-Dell docking station. The docking station is equipped with a Realtek NIC, and I've configured usbguard to manage USB device ...
5 votes
1 answer
5k views

dummy interface on linux

I need to create a second separate virtual interface on Linux. I choose dummy. And do these steps: $ cat /etc/modules-load.d/dummy.conf # Load dummy.ko at boot dummy $ cat /etc/sysconfig/network-...
32 votes
7 answers
222k 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 network scripts looks like this, after modification: # cat /...
0 votes
0 answers
43 views

linux Invalid ip_forward setting

The Linux system I customized runs on device A, which uses an ARM processor. Device A has two network cards: eth2 (fixed IP: 192.168.5.1) and wlan2 (fixed IP: 192.168.1.6). wlan2 is a USB to WiFi ...
0 votes
0 answers
59 views

Customized Linux system, wired and wireless connectivity interoperability?

The Linux system I customized runs on device A, which uses an ARM processor. Device A has an eth2 (fixed IP 192.168.5.1) and a wlan2, which is a wireless transmitter with a fixed IP 192.168.1.6. My ...
2 votes
2 answers
3k views

Cannot change UDP fragmentation offload

I have a Dell PowerEdge R740 server with an Intel Corporation Ethernet Controller x710 for 10GbE SFP+ network interface. I have installed RHEL 8 on it. I am trying to enable UDP fragmentation offload ...
0 votes
0 answers
36 views

Why does the use of traceroute not display the IP address of the route?

My device A uses a Linux customized system and an ARM processor, with two network ports: eth1 (ip: 192.168.1.1) and wlan1 (ip: 192.168.1.6). wlan1 uses a wireless transmitter, so it can be assigned an ...
1 vote
1 answer
128 views

How to create a linux vlan aware bridge with ingress packets untagged and egress packets tagged

I am trying to implement an obscure workaround to a specific problem tied to a switch misconfiguration I observe in a real case scenario. Please just assume the following : My system is plugged to a ...
5 votes
1 answer
45k views

How do I fix Debian that refuses to connect to the internet in VirtualBox?

The way Linux is designed, once you lose internet connection you're screwed. Because without internet, you can't install programs, and you just might need some programs to set up internet. Debian ...
5 votes
1 answer
3k views

Maintain ip link settings across reboot

Every time I turn on my computer, I have to manually set # ip link set wlp5s0 up in order to use my wireless card. Is there a way to maintain this setting across reboots? So if I set the interface up ...
7 votes
3 answers
2k views

How to find unspoofed MAC address of NIC

In Red Hat Enterprise Linux (RHEL) 8, if someone does ifconfig eth0 hw ether abcd12341234, all I know is ifconfig and ip -a, so then is there a way to reliably get the real MAC address of that eth0 ...

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