Usually tun/tap network interfaces are created on demand when a program opens the associated character device.What Apple announced. What is Tunnelblick doing about it For the latest information about Tun and Tap VPNs on macOS Big Sur, see Tunnelblick and macOS Big.First, I read about what TunTap is at Wikipedia and VTUN Sourceforge.
Tun Tap Driver Originated InBeing network devices supported entirely in software, they differ from ordinary network devices which are backed by physical network adapters. The Universal TUN/TAP Driver originated in 2000 as a merger of the corresponding drivers in Solaris, Linux and BSD.Go here Tun TAP driver for MAC OS X and download the installer package for Leopard.MAC drivers, features and settings for TS1 Digital Highlighter. They create a set of character devices /dev/tunX and /dev/tapX, respectively, where X is a number between zero and the maximum number of supported virtual interfaces.This is a TAP driver for Solaris that can be used forI made changes somewhat and added some code to it for supporting EthernetTunneling feature, since Universal TUN/TAP driver for Solaris only supportsSince there has not been TAP driver for Solaris, OpenVPN does not have codeFor handling a TAP device for Solaris. It enables TS1 to scan text and numbers to.Extract the package using Stuffit Expander (free app, google for it), and this will create a pkg file. This is a self installing script package so use Finder to run it, it will ask for your password so as to root privileges to install the Tun and Tap drivers into your dev directory.After this I went into my /dev directory and did an ls and you can see the Tun and Tap driver are there.Setup Dynagen to connect to the TAP driverThe next step is to then to create the TAP configuration in your dynagen net file. The following a sample:Image = /Users/gregferro/Documents/dynalab/dyncode/c3640-js-124-17.imageOnce you have get this to successfully start you will now be able to see the interfaceLo0 gif0 stf0 en0 fw7 en1 vmnet8 vmnet1 en3 en2 tap0We need to give this interface an ip address:Gf:smalllab gregferro$ sudo ifconfig tap0 198.18.0.250/24 upNow you will be able to configure R1 with an IP address and you can now reach your OS X system.Enter configuration commands, one per line. End with CNTL/Z.000033: *Mar 1 00:04:17.795 UTC: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up000034: *Mar 1 00:04:18.795 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, changed state to upR1(config-if)#ip add 198.18.0.1 255.255.255.0000035: *Mar 1 00:04:23.403 UTC: %SYS-5-CONFIG_I: Configured from console by consoleSending 5, 100-byte ICMP Echos to 198.18.0. The driver is used by other popular software so it looks like it is here to stay. On HostC, install TAP driver and openvpn, andAt this time, ifconfig on HostC looks like as below.Inet 172.29.73.55 netmask ffffff00 broadcast 172.29.73.255Inet 10.0.0.10 netmask ff000000 broadcast 10.255.255.255Now, HostC joins Network1 via tap0 interface through openvpn.But, please note that there's some limitation. To tun.c file.If you want to apply patch(1), put patch.openvpn-xxx.tun.c on the directory where you extractedSource code of OpenVPN, and run patch(1) command like as below.Inet 172.29.73.90 netmask ffffff00 broadcast 172.29.73.255Inet 10.0.0.90 netmask ff000000 broadcast 10.255.255.255 (2011.04.28).So if you are going to use OpenVPN 2.2.0 or later, you don't need to apply following patch.Put tun.c on the directory where you extracted source code of OpenVPN, and swap existing tun.cPlease note that you should rename tun.c. You can accessThese devices through /dev/tun and /dev/tap.Patch for OpenVPN has been merged into OpenVPN 2.2.0. tuntap.tar.gz (Last Update: 17th Jul 2012)After extracting tuntap.tar.gz file, run './configure', 'make', and 'make install' as usual.Both 'tun' and 'tap' driver will be built and installed on your system. hme driver transfer the packet to the wire, but never forward it to IP module.Of course, HostC can communicate with all the other hosts on Network1, but. Bridge module forwards packet to hme driver as RAW data. TAP driver forwards packet to bridge module. Ethernet packet from OpenVPN headed to HostB is passed to TAP driver. tunctl.tar.gz (v0.1.0) (Last Update: 27th Nov 2011)This is a Solaris version of tunctl command which was originally written by Jeff Dike.The tunctl command enables administrator to preconfigure a TUN/TAP device.This command would be useful for testing, or for those who wants to useTun/tap interface just as a virtual interface.After extracting tuncntl.tar.gz file, run './configure', 'make', and 'make install'.By default, tunctl command is installed in /usr/local/binThis Solaris version of tunctl command doesn't support the -u option,Which enables administrator to specify an user who can use the interface.I've tested on following Solaris version and platform. So, after executing2nd openvpn on HostB, you need to re-setup the bridge again.First, you need to drop existing settings. Once openvpn running on HostB is terminated,Bridge setting will be invalidated. Modified brdgadm.c file to make it to be able to handle e1000g. In open_tun() of openvpn, changed it to use I_STR ioctl command toThis will allow openvpn to specify instance number using 'dev' option, like In tun_ioctl() of tap driver, reverted to original TUN/TAP driver'sCode which retrieves ppa from user program. Confirmed that the driver was able to work with OpenVPN 2.0.9.And also confirmed that tun.c file included in OpenVPN 2.0.9 has notSo the above tun.c file can be compiled with OpenVPN 2.0.9 as well. Added tun_generate_mac_addr() to generate MAC address for tap device. Modified tun_unitdata_req() to work on x86 Solaris 9 Modified tun.c file of OpenVPN file to make it be able to be compiled with openvpn 2.1. Modified Makefile.in for brdgadm command, so that it allows to specifyInstallation directory by -prefix option of configure script. Added "-mno-red-zone" compile option for amd64. Removed unnecessary debug code from brdgadm.c. Modified configure script of both bridge module and tun/tap driver to Added -xmodel=kernel option for Sun Studio compiler on amd64 platform.(Formerly loading the driver failed with relocation error) Modified configure.in, Makefile.in and make it be able to build using Sun Studio Compiler.(Tested on Sun Studio 12) Modified openvpn patch file(tun.c) and make openvpn commnad won't fail because of failure of I_POP ioctl command. Modified configure.in and changed the way of checking GNU ld because latest OpenSolaris ld has -version option. Modified Makefile.in to be able to specify target directory using DESTDIR macro. Modified configure.in script to be able to build 32bit module on 64bit environment using -disable-64bit. ![]() tuntap: Changed configure.in to use uname -r for version checking instead of uname -v. tuntap: Changed tun.c configure.in to be able to build on Solaris 11 EA (snv_173).Because snv_173 doesn't have ddi_power kernel function and DDI_PM_SUSPEND macro. brdgadm: replaced strncpy with strlcpy. tuntap: Improved throughput perfomance by increasing q_hiwat of read side stream head queue. This enable driver compiled by gcc-45 to be loaded to the system without err(e.g relocation error: R_AMD64_32) tuntap: Modified configure scrip to use -mcmodel=large for gcc-45. Old games for cheetah mac osUse this at your own risk.But your advice or comment would be appreciated. Since this has not been tested well, please DON'TInstall this on production system. tunctl: Fixed to make tunctl bring tap interface up.I wrote this just for fun.
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