Questions tagged [tap]
The tap tag has no usage guidance.
76
questions
1
vote
0answers
20 views
Is there a tool I can use to test out multiple vpn tunnels in one machine?
I use wget -q -O https://checkmyip.com/csv to determine if I am connected to a VPN but I want to verify multiple VPN tunnels on the same machine. Is there a tool that can allow me to send a command ...
0
votes
0answers
192 views
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 ...
0
votes
1answer
57 views
two tap device connect each other in same pc
What I want to implentent is something like below.
192.168.1.1 192.168.1.2
+--------+ +----------+ +-----------+ +---------+ ...
0
votes
0answers
52 views
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 ...
3
votes
0answers
44 views
How to migrate OpenVPN architecture TAP to TUN
I did a tunnel system with OpenVPN to let a distant client act like a private network client to access private resources. It uses a client on the private network as a gateway.
DistantClient <-> ...
0
votes
0answers
322 views
OpenVPN TAP without bridging
I'm trying to make use of my VPS as OpenVPN server for "LAN" gaming which involves broadcasts, so I need to configure TAP. Typically, when I look up some examples of tap configuration, it uses ...
3
votes
2answers
176 views
Windows: Send all network traffic from script/app through specific TAP adapter
I have created a script in Node.js to remotely manage a server. To work the script needs to be connected to a VPN. The VPN it needs to connect to is different from the one I want Windows to use. Both ...
1
vote
2answers
196 views
OpenVPN - client connected to server, but cannot ping server or server's LAN
I am trying to ping the network of the Ubuntu server from Windows 7 (client). Both Ubuntu and Windows are clients on another OpenVPN server with the option client-to-client. The client can connect ...
0
votes
0answers
46 views
Understand linux bridge tunneling configuration
I have a VPN software that creates a tap device connected to a bridge:
$ brctl show vpnbr
bridge name bridge id STP enabled interfaces
vpnbr 8000.6630fabc3f2b yes tnl-2c5a50e
$ ...
1
vote
1answer
850 views
Forwarding ICMP response to TAP interface
I am trying to do a test where I forward ICMP responses to a TAP interface. I created a TAP interface and assigned it the address 10.0.4.1/24.
My linux setup uses the interface enp0s3 as the default ...
2
votes
1answer
1k views
Multiqueue tun/tap interface
I am trying to understand how Multiqueue tuntap interface works. Following the instructions provided at: https://www.kernel.org/doc/Documentation/networking/tuntap.txt
I was able to create multiple ...
0
votes
1answer
92 views
Can only access the gateway at the end of my ssh ethernet tunnel why?
I have a remote private network connected to the internet via a Linux gateway. The gateway has the following arrangement:
eth0 - external IP
br0 - with eth1, and tap0 devices added to the bridge.
...
0
votes
1answer
519 views
How to redirect traffic sent to tap to a specific ip addr
I created a tap device using the following commands:
sudo ip tuntap add mode tap tap7
sudo ip link set tap7 up
sudo ip addr add 77.0.0.1/24 dev tap7
Now, I am using c++ sockets programming to write ...
0
votes
1answer
859 views
OpenVPN server with two tap interfaces, how to allow tap0 to see tap1
I'm new to OpenVPN but have managed to install it on an Ubuntu machine. The requirement is to allow Mikrotik and then laptop clients to connect to the VPN. I managed to make this work by running two ...
4
votes
1answer
15k views
Cannot ioctl TUNSETIFF tap0: Device or resource busy (errno=16)
I'm having this weird issue that when I run bridge-start together with openvpn, the service won't start. If I don't let openvpn run bridge-start, and add the necessary interfaces (tap0, br0) manually (...
0
votes
1answer
559 views
SSH TAP tunnel & multicast groups
Is it possible to do UDP multicasting over an SSH TAP tunnel?
I have set up a TAP tunnel using SSH between my Ubuntu PC and a Raspberry Pi sitting in a remote office, using this command:
$ ssh -o ...
1
vote
1answer
4k views
Host to guest connection via SSH (using qemu vm)
I am having trouble to enable a host-to-guest communication using qemu VMs. The goal is to connect via SSH from the host to the guest VM.
I have the following setting:
host: local access to SSH ...
2
votes
1answer
4k views
OpenVPN TAP vs TUN in parallel
I have a few questions about our existing OpenVPN server setup and a requirement that we have to expand our access.
Our current setup is as follows:
1 OpenVPN server (in TAP mode)
Multiple VM ...
0
votes
1answer
995 views
How to set up single client TAP/TUN on the client for my OpenVPN?
My laptop OpenVPN client establishes a TAP device. My client config is TUN, though. This devices shows under ifconfig /ALL with the IP 10.8.0.6
and a subnetmask of 255.255.255.252. (!!!)
This ...
2
votes
1answer
1k views
Bonding over OpenVPN, for fault tolerance
I have two OpenVPN server, and two machines connecting to them.
Server 1 openvpn address: 10.158.1.1
Server 2 openvpn address: 10.158.2.1
Machine 1 has address 10.158.1.11 on server 1, 10.158.2.11 ...
0
votes
1answer
1k views
OpenVPN bridged client can contact local router, but not other hosts
I have an OpenVPN Server running on Ubuntu 16.04.1. I have set this up as a TAP/Bridging server and added bridging configuration to my /etc/network/interfaces file. My client is a Windows 10 laptop.
...
1
vote
1answer
2k views
Issues setting up TINC on Mac OSX 10.12.2
I have TINC setup on a few linux boxes and they are working great.
linux001 (static ip vps - 10.0.0.1)
macosx002 (connects to linux001 - 10.0.0.2)
linux050 (connects to linux001 - 10.0.0.50)
I also ...
2
votes
0answers
501 views
Tap interface is not receiving packets
I'm configuring a tap interface and trying to send and receive packets through it, i configure it like this:
ip tuntap add name tap0 mode tap multi_queue
ip link set tap0 up
i'm using scapy to send ...
0
votes
2answers
2k views
centos-7 missing /dev/net/tap
Going ls -l /dev/net shows the tun device (device 10,200) but there is no tap entry. Any ideas on how to get it working?
find /dev -name \*tap\*
finds nothing
CentOS Linux release 7.1.1503 (Core)
...
1
vote
1answer
3k views
Linux + OpenVPN; bridge interface not responding to ARP
I am trying to set up an OpenVPN connection with a Layer2 ethernet bridge to bridge two LANs. ARP responses do not seem to being generated correctly...
Please note I want to create a full Layer2 ...
0
votes
1answer
846 views
Restrict client IP address on OpenVPN using TAP interface
I've set up an OpenVPN + PF setup on a FreeBSD 10.3 server.
Clients to my VPN include administrators, which should have full access to the network and untrusted users who should ONLY be able to ...
2
votes
1answer
3k views
icmp ping reply not received by ping process, seen by tcpdump/wireshark
I'm having an issue with getting the actual ping process to receive the reply even though I can clearly see the response in the tcpdump output.
I'm running on:
Mac OS X 10.11.4 El Capitan
Bridge ...
3
votes
1answer
1k views
Openvpn tap interface configuration gets self assigned IP
I have a strange misconfiguration on my openvpn tap network.
Clients can connect and get there IP address in 192.168.42.x as intended, but after few seconds another address gets assigned to it, self-...
0
votes
1answer
432 views
OpenVPN TAP network
I have a question about the OpenVPN in TAP configuration.
I want to access local resources through VPN connection from outside network. I think I need TAP configuration, because I want to send ...
1
vote
1answer
338 views
How to correctly set up a bridge interface in GCE
I'm trying to set up a bridge interface as described in many docs, for instance:
https://help.ubuntu.com/community/OpenVPN
My setup in identical to that one, except obviously I used my GCE internal ...
google-compute-engine
0
votes
1answer
32 views
Endpoint to security gateway tunnel
I want to establish a connection between the client and the proxy server through a VPN tunnel in android device.
I want to do this at layer 2 or 3 , where a packet can captured and encrypted.
Please ...
0
votes
1answer
2k views
Ubuntu + bridge +qemu + tap + virtio dropping packets
I've got what I think is the standard qemu bridge/ubuntu tap interfaces set up running variety of VMs on my Ubuntu host. All the VMs I'm having trouble with are Windows images.
I have researched this ...
1
vote
2answers
89 views
Public IP is appearing while tapping network instead of private IPs
In my test environment, I connected a tap switch in front of the wireless router. This tap has 5 ports and port 5 is the mirror port which is connected to a computer. At port 1, modem is connected, ...
1
vote
0answers
49 views
Create 3 virtual interfaces that can ping6 each other
In Linux, how can you create 3 virtual interfaces that are bridged together through a virtual switch so that they can ping6 each other?
What I did:
tunctl -t tap1i
tunctl -t tap2i
tunctl -t tap3i
ip ...
0
votes
1answer
2k views
Multiple TAP devices on OpenVPN Server
So we have a number of clients that have their own VPS instances which we host via Proxmox. The clients servers are all behind a NAT firewall and we forward ports per client request to our various ...
1
vote
1answer
5k views
What exactly happens to packets written to a TUN/TAP device?
I'm trying to send packets to an application listening on eth0 from machine's user-space as if they were coming from a remote machine.
What I can't seem to find good documentation for is the exact ...
1
vote
0answers
32 views
Can a firewall handle packets being sent to it by a network TAP?
We have the intention of examining incoming mails for security purposes.
In order to do so we figured out the solution will include:
Network TAP - To copy all SMTP traffic to the firewall
Firewall - ...
0
votes
0answers
87 views
OpenVPN tunnel not able to support secure connect request
In CentOS 7 host we have installed openvpn package and did create an tunnel using OpenVPN tunneling for eth9 and tap9.
Everthing work fine for unsecure connection but when we try to connect to server ...
1
vote
2answers
2k views
TCP - TAP performance
Linux.
Is there a performance loss from using a tap device vs a hardware one like eth0 ?
The goal is to create a user space tcp/ip stack and avoid the kernel as much as possible.
I would like to be ...
0
votes
1answer
330 views
how to connect/bridge two interfaces on different processes
I have two processes A and B (simulating real hardware device), each with their own TAP interfaces. If I want to send an ethernet packet to A, I send it on interfaceA, and similarly if I want to send ...
0
votes
1answer
546 views
Openvpn, two tap network adapters
I have installed openvpn client on my pc (windows 7) and I have two tap network adapters. In this way I can open two openvpn connections at the same time. What I would like to understand is how it's ...
0
votes
1answer
4k views
Softether vpn ufw firewall config - is it correct?
I've correctly installed and configured Softether on my Ubuntu 14 x64 VPS in local bridge mode with a virtual TAP interface.
What I have now is a fully functioning L2TP/IPSEC server with two network ...
1
vote
0answers
190 views
OpenVPN TAP binding order issue
I am running a 64bit Windows 7/8 AD environment using OpenVPN on remote computers to access our network/servers in our main office.
Typically, once we install OpenVPN on a new machine and configure ...
4
votes
2answers
12k views
OpenVPN Linux Client does not bring up tap0 interface
I have an OpenVPN client on Linux connecting to an OpenVPN server. The server assigns IPs via DHCP, thus I connect using the tap interface rather than the tun interface.
OpenVPN connects, ...
0
votes
0answers
632 views
pfSense LAN network unable to communicate with remote network on OpenVPN TAP connection
I set up pfSense to connect to a remote network (192.168.122.0/24) that only accepts tap connections.
The connection is being initiated successfully.
pfSense (192.168.1.1/24) itself can connect to ...
11
votes
2answers
10k views
Ping not working from tap interface attached to bridge interface with ip on same subnet as that of bridge to outside
My requirement is to create a multiple tap interfaces, each with ip address on same subnet.
I tried this by creating a bridge
br0 (192.168.1.199)
___________|...
0
votes
0answers
78 views
Setup PERMANENT TAP adapter in VPS without dissapear after reboot
I'm installing Softether in a new VPS and all works fine. System is a CentOS 6.5 32bit.
The issue is that after rebooting the VPS the TAP adapter dissapear.
I would like to know if I can define ...
4
votes
3answers
10k views
Assign static IPs to tap clients in pfSense's OpenVPN server
I am trying to set up a pfSense server with OpenVPN.
The OpenVPN will use the tap interface, tun clients are no option for us.
The LAN network is 10.0.0.0/24, the pfSense machine is 10.0.0.10 and ...
2
votes
1answer
2k views
Ping (DUP) with Linux bridges and tap devices
http://imgur.com/qPoy2QJ
I have two Linux (Ubuntu 12.04) VM (running on KVM) that networked together using two Linux bridges as shown above. The network interfaces are Linux TAP devices.
The problem ...
1
vote
0answers
536 views
TUN/TAP VPN no internet connection
I have set up a tun/tap vpn to a VPS. For this, I created a 10/24 network and gave the server the IP 10.0.0.100 and my client got 10.0.0.200.
I can now successfully ping the server / access my mail ...
