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Questions tagged [tap]

93 questions
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I cannot see my OpenVPN TAP adapters in Hyper-V external switch bridging

I cannot see my OpenVPN TAP adapters in Hyper-V external switch bridging. Is it even supported in Hyper-V? I do not see any documentation where it says it is either supported or not. I have Windows 11 Enterprise by the way. I can however see it in…
falhumai96
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SSH Ethernet Forwarding Does Not Seem to be Working

I have Ubuntu 22.04 on both the client and server. I have set PermitTunnel yes in sshd_config in both the client (I might not need it on the client) and the server. I have also set Tunnel yes and TunnelDevice any:any in the ssh_config in both the…
falhumai96
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Configure network stack to consume data from TAP device, so that application can operate as if the data was intended to it

I have two devices communicating, A and B over udp. In between there is a tap device, where C is connected. In order for C to be able to receive the traffic it needs to set the same ip and mac address as A. (1) This works showing the data intended…
Aleksandarf
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Redirect traffic in "sniff/tap?" mode to specific ip address(es), that is: rewrite destination headers to target other machine(s)

I have incoming traffic on eth1 (vlan id 201) which is emitted by another machine which is doing sudo tcpreplay -x 0.01 --loop=0 --intf1=eth12 Wireshark_bidirectional_data.pcap I would like to rewrite the destination to target other devices e.g.…
Aleksandarf
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Does Linux tap interface support tcp segmentation on ipip network traffic

Recently I experienced an issue on running kubernetes slaves on a VM with calico ipip tunnel as the network connection protocol to interconnect the kubernetes nodes. The current symptom (with the confirmation of tcpdump) is that when a tcp traffic…
lordofire
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Creating a TAP network device in GCP VM

I am trying to create a QEMU VM within a GCP VM. I want the QEMU VM to use TAP network device to communicate with the host and external world. My desired set up looks like below. +-------------------+ +-----------------+ | Physical…
onlygo
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server remot access using VPN FW - TUN vs TAP

I'm trying to improve my home Firewall set up and I'm trying to figure out the best VPN configuration. GOAL: In order to reduce the open ports of my home webserver I thought to use SSH and webmin service only over a VPN connection and keep these…
gipsea
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How to send packets from Virtual Tap to different physical host

I am running some simulations that is using virtual tap to send and receive packets. Now I want to extend my simulation and send packets to different host. My simulation is sending packets to virtual tap with local IP 192.168.3.20, I want to take…
BytesxD
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is a tap interface on linux vulnerable to snooping attacks

If you have multiple VM's on a Linux host machine, and use a single tap interface on that host machine, is that network vulnerable to spoofing/mac spoofing attacks like a normal Ethernet network would be, or is there some intelligence in the way…
Tom Ribbens
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Gentoo hangs when adding main interface to the bridge

I've VPS on WEDOS serverhosting, Gentoo there. 5.4.38 kernel. I've a network interface eth0, I need to bridge it with another one (from openvpn). Starting with adding only one interface: brctl addbr br0 brctl addif br0 eth0 Here the system hangs,…
aikipooh
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Two tap device can't communicate over bridge

I want to exchange Ethernet Packet between two tap device(for implementing TCP/IP protocol stack in usermode). The problem I encountered is that tap1 and tap2 only can receive broadcast packet through bridge but not point to point packet! For…
Miracle
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ARP Reply is not forwarded to TAP device through Linux Bridge

Create two TAP devices, each of which will be read and written by the userland protocol stack. In addition, the two TAP devices are bridged by the Linux Bridge. The script to prepare the environment is as follows. sudo ip tuntap add dev tap0 mode…
Shikugawa
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How to enable external access to the Virtual machine on private link?

I would like to benchmark virtual networking of KVM-QEMU. For this purpose, I connect two servers (server 1, and server 2) with one wire. I use server 1 to run the QEMU VM and I want to access this VM from server 2. Here's the overview of the…
Mehrshad
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Attach a VM to a host TAP or TUN device

I'm working on a project whilst in lockdown in England, and I am hoping someone can offer some advice? I have a machine with 5 physical eth interfaces on Linux Mint, 20.04. All eth interfaces communicate as expected through firewalld and the world…
Bon
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macvtap interface associated with a VM on a host cannot ping host eno1 IP

VM interface XML config has source device pointing to the host management interface eno1 that is configured with IP of 10.134.159.48/24 When the VM is launched a macvtap interface gets created for the VM. I have configured VMs ip as…
lakshmi bangalore
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