Questions tagged [linux-networking]
Linux Networking refers to any networking function performed by a server running Linux. A Linux server operating as a router or firewall are the most common applications.
3,418 questions
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Can we implement file attachment or file transfer restrictions through VPN policies (e.g., WireGuard or OpenVPN)? [closed]
I'm exploring how to control or restrict file attachments and file transfers at the VPN level, using WireGuard or OpenVPN, to prevent users from uploading or downloading certain files while connected ...
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How to give QEMU (Debian 12) internet access via tun/tap on Android 15 (Termux, root) without using bridge?
I have an Android 15 device with root access and LinuxDeploy and LAN-interface.
The device is connected to a router via eth0 (192.168.1.128).
Inside LinuxDeploy, I’m running QEMU with Debian 12, ...
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Configure a VLAN with Internet access on a single linux box [migrated]
I am trying to setup a single-box network environment to test my application against a variety of network conditions. The basic thought is:
Create a VLAN, that has internet access.
Apply tc qdisc on ...
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How can I route traffic through a public server to a home server while preserving the client IP address? [closed]
I have two Ubuntu servers:
Public server – has a public IP and is accessible from the Internet.
Home server – server running in my house, only accessible from the public server.
I want the public ...
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I need RedHat to use default gateway on LAN NIC but still route WAN traffic out other NIC
RHEL 7.9 (will be upgrading soon). It's purpose is to host a commercial java based server/client app. The machine has two NICs: one for private LAN and one for public internet WAN. The purpose of the ...
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External IP on AWS EC2 instance not availble to applications and not reachable externally
I have associated an elastic IP with an EC2 instance. For security reasons, I don't want to post the exact IP here.
The instance is not reachable from that IP address. This is the result of an IP ...
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Things to do after DHCP offer and DHCP ack in Ubuntu [closed]
I have sent DHCP Discovery and Request and get response of DHCP Offer and ACK in Python scapy. What do I need to do after getting DHCP offer?
I have change my Ethernet adapter IPv4 as per DHCP offer. ...
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How to network-boot Debian clients without modifying the main DHCP server (PXE alternatives)
Summary:
In our network, we need to boot Debian 6, 9, or 12 clients over the network, preferably loading the entire OS into RAM. The goal is to be able to serve multiple system versions and custom ...
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Path MTU on Linux when there are multiple routes with different MTUs
On my Linux (actually OpenWrt) device, I have two default routes:
root@<>:~# ip route
default via 10.111.7.76 dev eth1 proto static metric 10 linkdown
default via <redacted> dev wwan0 ...
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Talos OS and TrueCharts - Failed to create network namespace for sandbox error
I have a Kubernetes deployment using Talos OS v1.10.3 with three masters deployed to ARM based hosts (two Turing RK1 and one Raxda CM5).
I used to run my cluster on my TrueNAS server using TrueCharts (...
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Using `ipvX.method=shared` in Network Manager: how to disable automatic NAT?
TLDR
I would like to create a virtual bridge in Network Manager, and take advantage of its "shared connection" feature to provide DHCP and DNS services over said bridge. But I do not want ...
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Linux IPv6 routing periodically stops for one client
I have a Linux-based router that sits between my PPP connection to my ISP and my home network and handles routing and a few other services. The ISP supports native v6 and the router broadcasts SLAAC ...
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Kolla-Ansible Openstack all-in-one Ubuntu 24.04 node unable to reach external network from internal network and router and vice versa
New to Openstack and trying to run a Single Host Node with Kolla-Ansible Openstack on a Ubuntu 24.04 server.
able to deploy and build instance, but I'm not able to get my instance or any internal ...
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Why wouldn't iptables rules be immediately applied?
I ran into a weird issue where commands to iptables didn't appear to be fully honoured by the kernel (5.14.0-570.18.1.el9_6.x86_64).
As part of debugging a separate issue, I decided to add a rule to ...
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Metallb not responding to requests from the public IPAddressPool
I've set up a k8s cluster to host several services for a project. The whole thing runs on a "one-box-wonder" which is a Rocky 9 Linux server acting as a KVM hypervisor (image below).
Each ...
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