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0
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1answer
24 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
0answers
19 views

Routing with bridge and multiple taps

I have a server with VPS nodes and 3 dedicated servers in other DCs. I use OpenVPN with tun devices and policy routing for packets being routed to a correct server like this ip route add via 10.0.0.1 ...
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0answers
17 views

Share local area connection with multiple TAPs

I'm setting up an VPN server. In this server I want to have 2 different encryptions (1024, 2048), each one in different ports. So I created 2 TAP adapters, and shared the local area connection with ...
0
votes
1answer
20 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
222 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
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0answers
32 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 ...
0
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0answers
115 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
170 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 ...
2
votes
1answer
289 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) ...
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0answers
23 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 ...
1
vote
1answer
2k 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 ...
0
votes
1answer
215 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 ...
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0answers
86 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 ...
0
votes
0answers
135 views

Can't bring link state on TUN/TAP interfaces up

Trying to build a tap interface to add as a virtual interface to OVS. I've tried using both Utilities and the ip tuntap command which create the interface- I can't seem to get the interface "up". ...
0
votes
1answer
257 views

Tap interface within a virtual machine has NO-CARRIER

I am trying to hook up a virtual machine to a host using openvpn. When i create a tap interface within the virtual machine using: /usr/sbin/openvpn --mktun --dev tap1 The state of the tap interface ...
1
vote
1answer
343 views

Openvpn limit bandwidth

I would like to ask you a question concerning openvpn and the possibility to increase the bandwidth in case I want to transfer files. I have an openvpn server via which I connect to my data center. ...
1
vote
2answers
884 views

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 ...
0
votes
0answers
88 views

Bridged network on OS X only gets UDP broadcast traffic

I've created a bridged network Mac OS X 10.8.5 using ifconfig and TUNTAP for OS X to bridge my wireless connection, en0, with a virtual interface, tap0, which I can use for guest VMs: $ sudo ...
0
votes
1answer
102 views

Unbridged tap device

Good UTC evening! I've created a tap0 device on my host, it looks like: tap0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 10.0.0.1 netmask 255.255.255.0 broadcast 10.0.0.255 ...
0
votes
0answers
161 views

OpenVPN bridging for Xen VMs

I have a following situation and need your help. My client has several servers-routers in different GEO regions and some servers within one DC which are used for a Xen virtualization each. Routers ...
0
votes
1answer
131 views

What is th tap100i0 device on my debian with KVM?

I want configure a network for virtual machines on KVM. I created a bridge. But I found a new tap100i0 devise was created. Should I take it into account to get the virtual network running?
1
vote
1answer
663 views

Passive ethernet tap [closed]

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: ...
2
votes
1answer
827 views

OpenVSwitch between namespaces

I'm trying to configure a bridge between two TAP interfaces each created inside their own network namespace, on Linux. I'm using OpenVSwitch as software bridge. These are the steps that I believe ...
0
votes
1answer
211 views

./pox.py log.level --DEBUG forwarding.l2_learning not working as expected

I have installed openvswitch on my PC with runs Ubuntu 12.04.I also have virtual box running on my PC with 3 virtual machines (Ubuntu 12.04) running on them. are named vm-1 vm-2 vm-3 I have ...
0
votes
1answer
139 views

Is there a way to allow specific permissions to a non-root user?

I have a program that, at some point, create/destroys tun/tap virtual adapters. Obviously, for these specific operations this program requires root privileges. According to the program ...
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2answers
141 views

VPN with authentication/encryption with separate tap interface for each client

is there any VPN program that handles client authentication, data encryption and ends in a tap interface for every authenticated client? I need 1 shared UDP port (VPN service port) to which clients ...
0
votes
1answer
178 views

Where is the userspace used by TUN/TAP?

When I put data on a wire in qemu what sets the upper limit on the rate of data I can transmit? The situation is I set up two machines A and B create two tap interfaces openvpn --mktun ...
0
votes
1answer
139 views

OpenVPN not acquiring IP on mac client

I have an interesting problem. I can confirm that the OpenVPN server is working because I can connect successfully on other Windows machines. On my personal mac laptop though I can connect but the ...
2
votes
1answer
496 views

How to connect a virtual NIC in one QEMU-KVM instance to a virtual NIC in another QEMU-KVM instance without a bridge

Is there a way to connect a Virtual NIC one QEMU-KVM instance to a Virtual NIC on another QEMU-KVM instance. I want to be able to do this efficiently and it may be possible that the 2 instances could ...
1
vote
1answer
1k views

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 ...
4
votes
1answer
462 views

Open source network tap

I've recently begun researching network monitoring solutions. I've configured SPAN on our cisco catalyst, and it's working ok, but I've been reading up on taps too. Most of the articles I've seen ...
3
votes
1answer
1k views

ARP reply vanishes from br0 to tap0 using OpenVPN in bridging mode

i have setup a linux box (on an esxi5) which acts as an openvpn server. the server is configured to use bridging for the clients, which essentially works, with one exception. if the client pings some ...
6
votes
1answer
519 views

kvm, vlans, how to simulate a 'mirror' port

I'm working with kvm 0.14.1 on an ubuntu lucid x64 box. I've got 3 vlans configured, one that is a bridge to the host's eth1. The others are host only. I want to start playing with snort. Is there ...
1
vote
2answers
6k views

How do I enable TUN/TAP forwarding?

I have a program which writes packets (destination address 10.3.0.2) to the TUN/TAP interface. Network: host1|tun0----eth1(10.3.0.1)|-------------------host2|eth1(10.3.0.2)| Wireshark captures ...
1
vote
1answer
691 views

IP Packet Capture/Manipulation via TUN/TAP

I'm trying to capture and manipulate incoming IP packets (via eth0 interface) by using a TUN device (since I'm only concerned with IP layer). The first step I think is 1:1 packet forwarding from eth0 ...
0
votes
1answer
393 views

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 ...
1
vote
1answer
764 views

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 ...
0
votes
2answers
748 views

how does openvpn decide which interface to get IP addrs from

Using ubuntu 10.04 on both ends. We have a client and server machine on the SAME network attempting to make a vpn connection. We use the config files from here and made minimal changes. The server ...
4
votes
2answers
10k views

How can I setup OpenVPN with IPv4 and IPv6 using a tap device?

I've managed to setup OpenVPN for full IPv4 connectivity using tap0. Now I want to do the same for IPv6. Addresses and network setup (note that my real prefix is replaced by 2001:db8): ...
0
votes
2answers
432 views

OpenVPN bridging with venet interfaces

I have a VPS which uses venet interfaces for its (virtual) ethernet connections. I've managed to get an OpenVPN daemon running with tunneling, but not able to do so with bridging (tap). Is it ...
0
votes
2answers
634 views

openvpn without tap module? replacement?

I am trying to instal openvpn on a special linux distribution that has no tap kernel module, and all howtos avaliable are outdated. I was wondering if there is a way to run vpn without this kernel ...
0
votes
2answers
444 views

Dynamips and Tap Devices, To and From the same machine

I am setting up a dynamips/dynagen lab and am wondering if there is any way to get traffic to route out one tap devices, go into the lab, and come back to a tap device on the same machine. I have ...
0
votes
2answers
2k views

Cannot open TUN/TAP dev

Can someone please help me with this? I have a linux 2.6.9 server (I know it's outdated, but it has some special modules and so kernel cannot be updated/recompiled/etc), and I need to have a tun/tap ...
36
votes
6answers
51k views

Should I use tap or tun for openvpn?

What are the differences between using dev tap and dev tun for openvpn? I know the different modes cannot inter-operate. What is the technical differences, other then just layer 2 vs 3 operation. ...