This should be automatic on a mac no Even when I use all manual and insert the same subnet settings as the EZ share are showing (all internal sans the DNS ) I still get no love.How do I set NAT and port forwarding under MAC OS X How do I forward ports using OS X for BitTorrent clients Network address translation (NAT) is the process of modifying network address information in IP packet headers while in transit across a traffic routing device for the purpose of remapping a given address space into another.
Mocha Tn3270 , Select Menu - Help - Insert Manual And InsertIn other words, if your Mac book connected to the Internet, you can share its Internet connection with other computers on your LAN. ADVERTISEMENTS In this example, your Macbook is connected to the Internet via Airport and you are sharing the Internet via Ethernet which is connected to your desktop. Mocha Tn3270 , Select Menu - Help - Insert Mac OS X EthernetAirport gets a public IP address via ISP connection and Ethernet has the following manual IP settings: Mac OS X Ethernet Network Settings WARNING These examples may stop networking and the Internet on your laptop and desktop computer if not executed with care. Turn On Internet Sharing Open System Preferences by visiting Apple menu System Preferences: Fig.01: Mac OS X System Preferences Click Sharing: Fig.02: Mac OS X Sharing the Internet Connection Select Internet Sharing: Fig.03: Mac OS X Sharing Airport Internet Connection With Ethernet Connected Computers You need to select your Internet connection using Airport. How Do I Use Shared Internet Connection On Other Computers You need to input the following networking settings for desktop computer called desktop1: IP address 192.168.2.2 IP netmask 255.255.255.0 IP gateway 192.168.2.1 IP DNS server 192.168.2.1 For example, if you are using Ubuntu Linux on desktop update networking configuration as follows in etcnetworkinterfaces: auto eth0. However, you can create a shell script as follows (open terminal and create a script called osxfw.sh): binbash. My Ubuntu desktop connected to transmission BT client: Fig.04: Transmission Ubuntu BT Client Connected To The Internet Via OS X Router References: Apple natd(8) man page. Keep it up, And Thanks, Jaysunn Reply Link nixCraft Jan 10, 2010 6:31 Thanks Jaysunn Im getting lots of questions about OS X via email and I think it is a time to address all of them. In short, you will see more OS X here but no Windows 7 soon:) heh Reply Link Andrew Jan 21, 2010 13:55 Sorry moderator the above post was mangled here is the correct one please ignore the first in moderating This is not really the best way to do it if you already have and existing network as OS X will change your network settings to its own defaults 10.0.0.x8 on airport and 192.168.2.x24 on ethernet. If your internet connection is pppd based you are better of calling usrsbinsysctl -w net.inet.ip.forwarding1. This ensures your network remains the way it is, and you are not running unnecessarily services on your OS X machine, as enabling internet sharing via the GUI automatically starts up a named DNS proxy server, a BOOTP service and NATD which you may not really need in an existing network. DISCLAIMER, The above examples do not include firewall protection, they are just to show a command line based way of achieving this in a better way. Reply Link Patrick Dec 20, 2010 20:30 How can I reset all the changes Ive made Reply Link Cedric Mar 3, 2011 20:07 Many thanks for this useful article and posts. You propose calling the following processes from the init files: usrsbinnatd -clampmss -dynamic -unregisteredonly -interface 1 sbinipfw add divert natd all from any to any via 1 I dont understand why it is necessary to provide the via 1 argument and Im also wondering whether this is correct. I understand from the man page of ipwf that the via argument causes the interface to always be checked. I understand that we may want to masquerade before sending out packets coming from our internal LAN. So the interface is always checked, packets will be sent to natd for masquerading when coming in. To make it clearer, if WAN is on en0 and LAN is on en1, then the script should probably rather call: usrsbinnatd -clampmss -dynamic -unregisteredonly -interface en0 sbinipfw add divert natd all from any to any via en1 i.e. Do you agree Thanks. Reply Link nixCraft Mar 3, 2011 21:35 1 indicates that those commands are stored in a shell script. I have been supplied with a wireless router Huawei Echolife HG521, and I need to enable port forwarding for UDP port 16000. How does this need to be set up Reply Link Rick Apr 29, 2011 7:43 I am writing from my friends account who is a tech but out of town. So I have enabled airport, selected create computer to computer network, set up name, password, etc. It can be see by other air computers but it only selbf assigns a faux IP. When I go to DCHP manual using a subnet that the orig ethernet input is giving me, it still will not translate to usable addys.
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