Apr 09, 2019 · Linux comes with various command line utilities to dig information about network adapters such as Ethernet, WiFi and other installed in your system. This page shows how to find network adapter status in Linux using bash or any other modern shell.
TUN/TAP provides packet reception and transmission for user space programs. It can be seen as a simple Point-to-Point or Ethernet device, which, instead of receiving packets from physical media, receives them from user space program and instead of sending packets via physical media writes them to the user space program. A bridge interface doesn't require an ip address to switch frames between ports. Sure, you can configure a bridge interface without an ip address. In this case your linux host will work as a simple L2 switch. When you assign an ip address on a bridge interface, you can consider your linux host as a advanced L3 switch. Jun 02, 2016 · (1) Setting up a virtual TUN interface. # create a tun interface called 'asa0' sudo ip tuntap add dev asa0 mode tun # set an ip address sudo ip addr add 10.0.0.1/24 dev asa0 # bring the interface up sudo ip link set dev asa0 up # let's see the settings now and then ping to our IP address of the TUN # interface ip addr show ping 10.0.0.1 Mar 26, 2010 · Network interfaces in Linux don't appear under /dev; the only thing you'll see there is /dev/net/tun, which is the device that should be opened as the first step to create a tun/tap interface. If you run the sample code, you'll be able to see and configure the interface you create by using "ip link" while the program is running; when the Aug 06, 2009 · Hi all, I'm trying to write a script that will turn off the network interface eth0 on a linux Gentoo machine and then turn it back on, any help? Thanks, Neked | The UNIX and Linux Forums
I'm quite used to see "incorrect" TCP checksums on interfaces that have hardware TCP checksum offloading (because pcap sees the packet before it's handed to the hardware for checksumming) - but on a *tun* interface, with no hardware to actually offload it to? Is this something new in the way Linux tun operates?
Jan 14, 2016 · I'm trying to do something with the virtual network interface on Windows10, in which I need to operate directly on the virtual network device (similar to tun/tap). As is known, tun is native to Linux so it's fine to use it in Linux. And I'm wondering if there is any such "native" virtual network interfaces in Windows10? Thanks in advance. I'm quite used to see "incorrect" TCP checksums on interfaces that have hardware TCP checksum offloading (because pcap sees the packet before it's handed to the hardware for checksumming) - but on a *tun* interface, with no hardware to actually offload it to? Is this something new in the way Linux tun operates? The interface name is followed by the name of the address family that the interface uses. This will be "inet" for TCP/IP networking, but there is also some support for IPX networking ("ipx"), and IPv6 networking ("inet6"). Following that is the name of the method used to configure the interface.
Aug 06, 2009 · Hi all, I'm trying to write a script that will turn off the network interface eth0 on a linux Gentoo machine and then turn it back on, any help? Thanks, Neked | The UNIX and Linux Forums
48. Tun|Tap Poll Mode Driver. The rte_eth_tap.c PMD creates a device using TAP interfaces on the local host. The PMD allows for DPDK and the host to communicate using a raw device interface on the host and in the DPDK application. The device created is a TAP device, which sends/receives packet in a raw format with a L2 header. The default interfaces file looks like the following: Where auto starts the interface at boot and iface calls the network interface (in this case lo, loopback). All lines beginning with “ auto ” specify the interfaces which will be enabled when running “ ifup -a ”, a command executed at boot. Aug 05, 2009 · # "dev tun" will create a routed IP tunnel, # "dev tap" will create an ethernet tunnel. # Use "dev tap0" if you are ethernet bridging # and have precreated a tap0 virtual interface # and bridged it with your ethernet interface. The configuration file /etc/interfaces also allows setups for the Bootstrap Protocol [6] (bootp), PPP (ppp) as well as IPX [7]. Showing the interface configuration. Up to the release 8 of Debian GNU/Linux use the command “/sbin/ifconfig” to display the interface configuration. See the configuration for the first ethernet interface below.