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I have an application and want to start a firefox where all network traffic from firefox goes through the application which does magic (doesn't really matter what it does). The idea I have is to open ...
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I have 2x internet connections on a linux box (running slackware btw). The ascii schematic is the following +------------------+ | eth1| --- modem #1 --- ...
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I have a physical network with several VLANs. One of my computers (my main workstation) is connected to two different VLANs on this network, one tagged, the other not. I have successfully set this ...
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I have a docker container with the internal ip addr 172.17.0.2, that is connected to the docker's virtual interface with ip 172.17.0.1 on my host: root@ldc1:/# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> ...
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I have here a process from which I do not want to access the internet, except from my company VPN. My company VPN is using a tun device. If the VPN is not active or does not work, the expected ...
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I'm using a fresh minimal Ubuntu server 24.04.1 LTS install. I run these commands as root to set up networking and do some experiments: apt install -y netcat-traditional tcpdump inetutils-ping ip ...
Adrian's user avatar
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I'm using a fresh minimal Ubuntu server 24.04.1 LTS install. I run these commands as root to set up networking and do some experiments: If you have seen this post, it's the same setup but with the ip ...
Adrian's user avatar
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I'm using a fresh minimal Ubuntu server 24.04.1 LTS install. I run these commands as root to set up networking and do some experiments: apt install netcat-traditional ip netns add ns1 ip netns add ...
Adrian's user avatar
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I'm trying to run socat forward ttyACM0 into UDP. It works with command. socat UDP-LISTEN:14550,fork,reuseaddr FILE:/dev/ttyACM0,b57600,raw Problem is, I need to access socat via ip address, which is ...
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A couple of days ago I had a motherboard failure and as a result I bought a new computer. I swapped in the old hard drives and after a couple of hiccups, everything was nearly the same again. It is ...
Shaav's user avatar
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This question hints that it is possible to create a veth (which normally requires root) from inside a user and network namespace, and indeed: user@host$ unshare --user --net -r =bash root@namespace# ...
F.X.'s user avatar
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I recently became aware of solutions like slirp4netns or passt/pasta which essentially work around the fact that you can't create a pair of veth network interfaces without root (or CAP_NET_ADMIN). ...
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Hello I have a simple setup for explanation purposes created with following scripts:` env.sh CON1="con1" CON2="con2" NODE_IP="10.0.0.20" TUNNEL_IP="172.16.1.100&...
TheCoolDrop's user avatar
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I want to write a udev rule (ACTION=add) that will create a new network namespace, move the newly added device to it and exec some commands inside it. I was using irpoute2 to do so (Inside the rule): ...
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I have an AppImage which I need to run 3 instances of, concurrently. Each instance will use it's own profile (Home directory). That's all very easy: HOME=/home/user/home AppName.appimage Now the ...
rogerwhite's user avatar
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I'm trying to make one network namespace to be able to ping another namespace via a bridge. Here are the commands I'm executing: # create two namespaces ip netns add ns0 ip netns add ns1 # create a ...
AhmedWas's user avatar
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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 ...
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I'm running my own flavor of Debian (trixie, 6.1.0-9-amd64). I had set up a custom systemd service to establish a network namespace and route VPN traffic through it (which has worked flawlessly for ...
stevo1977's user avatar
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I am using unshare to create a network namespace: unshare -rn bash I already have the a working setup with veth-interfaces as described in this guide: https://josephmuia.ca/2018-05-16-net-namespaces-...
Aykut's user avatar
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I am trying to run google-chrome with a specific network namespace, but when I do there is no audio. I run the command so that it is running in the network namespace as follows: sudo ip netns exec ...
Mark's user avatar
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I'm running Arch Linux on a laptop. What I want to achieve: Multiple users When each user logs in on a tty (which could be while another user is logged in on another tty---they're all me), they're in ...
user747267's user avatar
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I have a lima VM with linux running Ubuntu 23.04 with kernel 6.2 and cgroupsv2. This VM is meant to serve as docker host. When I create docker network in this VM I get an interface in its own ...
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I am having a dumb, and I am hoping you lovely people can jumpstart my brain. I am running a service in a local network namespace. The namespace looks like this: # ip -n ns1 addr 1: lo: <LOOPBACK,...
larsks's user avatar
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I am trying to communicate between two network namespaces that are connected through the root namespaces using veth pairs as seen in the diagram. I am unable to perform a ping from netns A to netns B. ...
Rahul Raj Purohit's user avatar
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I sometimes run my browser in a VPN netns, like this: sudo ip netns exec vpnns sudo -u myuser google-chrome & This works great, except sometimes it seems that the netns "steals" the ...
Thomas's user avatar
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My aim is to route the default namespace through my vpn, and create a new namespace which does not route through the vpn (so i can selectively launch programs that should not have access to the remote ...
Neurofibromin's user avatar
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I'm running fedora 36 using firewalld as my firewall. I set up a network namespace called "wireguard". It contains the interface wg0 which connects to Mullvad VPN. I set it up like this: ip ...
minamikoarikui's user avatar
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The ip-vrf manual reads : A VRF provides traffic isolation at layer 3 for routing, similar to how a VLAN is used to isolate traffic at layer 2. Fundamentally, a VRF is a separate routing table. At ...
Rêve's user avatar
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I have two VMs VM-A & VM-B connected via IPIP Tunnel in a namespace. I want the application in VM-B which is under namespace to be accessed from the public IP of VM-C. Can someone help me how can ...
ph3ro's user avatar
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I have three VM's. VM-A,VM-B & VM-X. I have a application running on the backend server VM-X. VM-A is the Main frontend server which has high capacity. VM-B is just a standby server of low ...
ph3ro's user avatar
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Hey guys this is probably just something stupid I'm missing, but I'm having trouble setting up a net namespace to use for my VPN. The weird part is that this script/setup was working, and has suddenly ...
samikool's user avatar
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Following goal: I have lxd containers each set of containers should have their dedicated isolated network each should still be able to connect to the internet (e.g. apt update or curl), but not leak ...
stackbox's user avatar
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I'm currently using subprocess.run(["socat", f"udp-listen:{_to},fork,reuseaddr,bind=127.0.0.1", f"""exec:'sudo ip netns exec {netns} socat STDIO "UDP-connect:...
DrownedSuccess's user avatar
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I'm writing a container manager script which depends on nspawn, and the container is using a Virtual Ethernet Connection(-n opt). but it looks like that nspawn only support port mapping for single ...
Tsing Kwai's user avatar
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I've run sudo sysctl -w net.ipv4.ip_unprivileged_port_start=1. However, sudo ip netns exec myvpn unshare -r python -m http.server -b 127.0.0.1 2 does not work. Strangely enough, this does: sudo ip ...
DrownedSuccess's user avatar
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I would like to run a l2 evpn (vxlan) bgp speaker in a different namespace and advertise the learned addresses into another namespace. In building the following topology, the BGP daemon populates the ...
Alex Turner's user avatar
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I am trying to use iptables to packet mark packets of a certain source/destination IP in the mangle table on a given host. The packets are later forwarded to a particular network namespace on the same ...
Alexander. C's user avatar
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How do I make docker run to setns to the network namespace of my choice when starting a container? I want something like --net host mode, but aiming to the namespace of Docker server itself. Or should ...
Vi.'s user avatar
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Two containers talking to each other on overlay network with high traffic (connection frequency) occasionally got connection lag almost exact multiple of 1s. It doesn't matter whether it is same host ...
DevilaN's user avatar
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I have a network namespace and I want to run command with this netns bash pid, how can I do it in bash script? Code example: sudo ip netns add ns1 #this is my network namespace #In separate shell I ...
Spams's user avatar
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I have two Virtual Machnes (VM) in Virtualbox connected with internal network. On the first one I have network namespace named n0. I want to connect this namespace to network interface and finally ...
Spams's user avatar
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How can I capture traffic specifically from a network interface inside a network namespace using tshark? In my case, the network interface tun0 is moved into the network namespace called vpn. Normally ...
EarthIsHome's user avatar
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I am using Ubuntu Mate: $ echo $DESKTOP_SESSION; cat /etc/issue; uname -a; mate Ubuntu 20.04.4 LTS \n \l Linux mypc 5.4.0-104-generic #118-Ubuntu SMP Wed Mar 2 19:02:41 UTC 2022 x86_64 x86_64 x86_64 ...
sdaau's user avatar
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I have 3 Linux VMs connected like this: / server1 \ | ens19 2001:1::2 | \ / | / \ | ens19 2001:1::1 | | ...
Chris's user avatar
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I created a simple test netns : sudo ip netns add test Then I brought up the lo interface. I'm currently in the home directory of user1, and by executing sudo ip netns exec test ls -la I see all the ...
eric's user avatar
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Is cgroup a type of namespace? I am asking this because I have seen blogs talking as if cgroup and namespaces are different. However, in different linux commands , cgroup is considered as a type of ...
Ahmad Ismail's user avatar
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I have an app I run in a network namespace. This works well. I want to run the app multiple times, in different namespaces. For convenience, I want to bind mount the app's working directory to ...
sea chub's user avatar
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I am trying to create two tap interfaces which are connected via a userspace program which should be able to see (and later modify) all packets going over the "wire". While this works when I ...
tim0s42's user avatar
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From https://man7.org/linux/man-pages/man1/n.1.html : By default, a new namespace remains in existence only as long as it has at least one member process. A namespace can be made persistent— that ...
Carlos Vazquez's user avatar
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I'm following this video about network namespaces in Linux, and trying to practice it myself, but for some reason it doesn't work. What I've done is: After creating 2 network namespaces named "...
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