With port forwarding set up like this, instead of specifying a computer on the network by IP address, you are specifying one by port number and allowing the router to know which IP address to send that port information. As such, all you need to know is your router's IP address, and which port number you specified for what computer. While this tip is outlined for screen sharing, you can do this for pretty much any networking service, including AFP, SMB, and FTP file sharing services, game servers, and websites.
This is a relatively old and simple way to connect to different computers on a network, but it works and is very useful. The main problem with using port forwarding is knowing your IP address, which can be especially difficult with dynamic IP addresses. If your IP address suddenly changes because of an ISP network reset, or other situation such as loss of power to your router causes it to renew its IP from the ISP, you will be unable to connect until you can look up your router's IP address again.
There are many utilities out there that can detect the computer and router's IP addresses, and send out email notifications when the IP address has changed, and keeping one installed on a computer you always have running will ensure you're informed of your router's IP address.
One such utility I recommend is Bwanadik , which is a simple menu item that supports email alerts. Port forwarding setups are easy, but do require you to know IP addresses and enter port numbers in URLs. The easiest way to share with multiple computers is probably to subscribe to MobileMe, but many people may not wish to pay for this.
If you are one of those people, and have access to your router's admin settings, then port forwarding setups such as this one may be the next best option. Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement.
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Authored by: Support. With decades of experience, our Tech Pros are passionate about making technology work for you. We love feedback! Accessing the files stored on your Mac computer while you're away from home is easy to do, thanks to the built-in Screen Sharing feature of macOS. In this guide, we will demonstrate how to set up the Mac in your home, as well as your router for remote access via Screen Sharing.
This will allow you to access your Mac from any other Mac while you're on the go. Before You Begin: You'll need your router's administrative login and password to be able to access port forwarding settings. Select the Apple menu, then System Preference s.
Select Sharing. Place a check next to Screen Sharing. You now need to forward two ports from your router to your Mac. We're here to help! Related articles. Select Network. On the left, select your active network connection.
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