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Questions tagged [tap]

93 questions
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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 server inside guest VMs required guest: qemu based VMs…
Zee Age
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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 bridge, so that all traffic, including broadcast…
Jonathan Preston
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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 IP, my GCE gateway for my gateway, and set MTU to…
FuriousGeorge
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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, port 2 is connected with the WAN port of router.…
user3806770
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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 addr add scope link fd80::1/56 dev tap1i ip addr…
capr
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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 - The firewall in turn will get the traffic from the…
tripst0r
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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 sure that developping on top of a tap device is the…
Larry
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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 the binding order (advanced setting in the network…
Rich
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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 server etc using the 10.0.0.100 address, so all is…
Nick
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Tap0 not receiving traffic

I have created a tap device tap0 address 10.2.1.4 and added it to a host bridge br1 with address 10.2.1.1 I have "nc 10.2.1.4 -l 1234" running on the host and from another machine I do a "nc 10.2.1.4 1234". tcpdump -i tap0 doesn't show any of the…
user199098
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Passive ethernet tap

I'm having an hard time figuring out why can't I capture the packets flowing between two devices, in both directions, using a self made Ethernet tap, with copper cable, which looks just like this one: Both end devices (say, A and B) are connected…
bulkmoustache
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pfSense - OpenVPN - tap - client connection: Default Gateway Error

We have setup a OpenVPN Server on a pfSense v2.0.1 Router with the "OpenVPN tap Bridging Fix package" to build a bridged VPN network. We followed this HOWTO: link Nearly everything workes fine expect getting tap device online on client side (Ubuntu…
Arny80Hexa
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why tun interface in openvpn

can anyone tell me the use of tun interface in openvpn? as far as i read, it is used to tunnel all the traffic from the PC over the ssl tunnel. But incase of VPN, i suppose all the traffic initiated from remote-pc should have the ip-address assigned…
summasumma
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Check packet vlan tag using Tap virtual interface

I am trying to learn how to implement virtual interfaces using the Tap driver. So far my understanding is that using the tap driver I can create a virtual interface and then have a userspace program attach to this interface to analyse the data…
ankit
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Advice required for sending STP BPDU traffic between tap interfaces connected by common bridge

Need advice for the bridge tap interface to run stp traffic. created the tap interface and bridge   Have come across stp BPDU is consumed by bridge. i'm running the scapy on the host, however i'm not seeing the stp BPDU on the bridge nor on the…
Santosh Kumar
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