Step 1) Install VNC on the PC you wish to Remotely Control and make sure it's listening
You first need to Setup/Enable the host computer so it can accept remote VNC connections and make sure your client has the VNC Viewer client application. You also need to setup a VNC password on the system. For more details on setting up VNC, and using the VNC Viewer client application, click below: http://www.realvnc.com/gettingstarted.html
Now that you have the "host" (the computer you want to control remotely) computer setup with VNC, you should then set a STATIC LAN IP address on that system. This ensures that when the host system is restarted, or rebooted, it will always comes up to the same LAN IP address on your router. This is important to make sure the port forwarding works properly.
Step 2) Set a Static LAN IP address on the VNC Host system
Set a Static IP address of 192.168.1.200 on your host system. This is assuming that your Linksys router is setup as the default LAN IP of 192.168.1.1, if not, adjust accordingly.
Need help setting a static IP on your system? - click here
Step 3) Test the VNC Connection on your LAN
You are now ready to test and make sure that the VNC host is running properly and answering remote control requests. The first test will be a LAN test. Use a Windows Laptop or Desktop on the same LAN, and run the VNC Viewer client application on that system. To run the VNC Viewer client, click Start, Programs, VNC, and then select VNC Viewer from the VNC programs menu. You will then see a screenshot similar to the one shown below. Type in the STATIC LAN IP address that you set on the system in step 2, in this case we used 192.168.1.200 – hit OK. You should then be connected with the host system. Use your password that you set on the host when installing and configuring the VNC server. For more detail, click http://www.realvnc.com/gettingstarted.html
Hint: Having trouble with this step? Not Connecting?
If you cannot connect at this point, something went wrong. Make sure you do not have any software firewalls such as Symantec Internet security or the Windows Firewall. Check the host system is on the network, and that you have the VNC server enabled and listening on the host system as described in step 1.
Now that you have ensured VNC is up and running on the local LAN, and you can remotely control the PC, you now want to open the ports in the router. This will enable remote desktop to be accessed over the Internet. This means you can control the host from the Client and much more.
Step 4 ) Configuring port forwarding in the Applications and Gaming Menu
Opening ports in your Linksys router is very easy. You first need to log into your Linksys router
Log into the router by going to http://192.168.1.1 and using your username and password to log into the router as shown in the screenshot below:
(The Linksys default username and pw is blank/admin as shown below)
Once you log into the router, Find and Click the APPLICATIONS and GAMING link in the top menu as shown circled in the screenshot below. Your router may look slightly different, but most Linksys routers now have all port forwarding within the Applications and gaming menu.
Once you get into the APPLICATIONS and GAMING menu in the router, you will see a list of ports, and IP's as shown in the screenshots below. Keep in mind that your router will look like one of the two screenshots. Newer routers will look like the first screenshot, and older models appear similar to the second screenshot:
 Newer Linksys routers - Applications and Gaming screen.
Older Linksys routers - Applications and Gaming screen.
Step 5 ) Adding Ports into the Applications and Gaming Menu in the Linksys Router
In your router, depending on your Applications and Gaming menu, add in the “VNC” name within the Application field. You should then type exactly as shown above – Start port is 5900, End port is 5900, TCP or Both for protocol (either will work) and make sure the IP address is set to the Static LAN IP of the host computer we set earlier. In this case, we used 192.168.1.200. Now make sure the port range is enabled. Scroll down and click SAVE SETTINGS to save these settings. You are now done with the port forwarding. Double check your settings before moving to the next step.
Step 6 ) Signing up and Enabling the TZO.COM Dynamic DNS in your Linksys router
Make sure you already have a TZO account, or if not, you are at least signed up with a trial account **If you do not have a TZO Key and Domain Name selected, sign up for a free Linksys branded trial domain at http://Linksys.tzo.com and select “SIGN UP FOR A FREE TRIAL”. You will then see the screenshot shown below.
Enter your choice for a domain name (and enter the email address you wish to use. Click the CREATE MY FREE TRIAL DOMAIN NAME button and TZO will then immediately send your TZO Domain Name and TZO key to the email address you used.
IMPORTANT: *** CHECK YOUR EMAIL ADDRESS NOW TO GET YOUR TZO KEY ***
Once you have the TZO Key, Domain name and Email address used written down or available from your email, log into your router by going to http://192.168.1.1 and using your username and password to log into the router. (default username is blank and password is admin)
Once you are logged into the router, click the DDNS link in the lower left of the menu as shown circled in the screenshot below:
You will now see a screenshot similar to the one below. This is the DDNS section of the router. You should enable the TZO Dynamic DNS service, and then input the Domain Name, TZO Key/Password and Email Address/Username into the router DDNS setup. Click Save Settings at the bottom of the page. You now have setup the TZO DDNS properly.
This domain name is good for 60 days for your use and testing. After 60 days the TZO Dynamic DNS service will expire. You can purchase the TZO standard Dynamic DNS service for this domain name at https://www.tzo.com/cgi-bin/Orders.cgi?ref=linksys before it expires. When ordering, use the domain name and the same email address you used when signing up.
The TZO Dynamic DNS is now monitoring your IP address of your broadband connection. If your IP address changes your TZO Dynamic DNS running in your router will then update the TZO DDNS servers. You can now go to the last step and start using your TZO Domain name to remotely control your PC over the Internet!
Step 7 ) Connecting and Controlling your PC with VNC via the Internet
You are now ready to test and make sure that the VNC host is running properly and answering remote control requests over the Internet. This means you must leave the network where the Host PC is located to test over the WAN. If your PC you want to control is at Home, go to work and test this step, or go to a friends house with a broadband connection and test from there.
Connect a system to the Internet and the run the VNC Viewer client application on that system. To run the VNC Viewer client, click Start, Programs, VNC, and then select VNC Viewer from the VNC programs menu. You will then see a screenshot similar to the one shown below. You will then see a screenshot similar to the one shown below. Type in the TZO DOMAIN NAME that you set in the router in step 2, in this case we used Name.LinksysNet.com – hit OK. You should then be connected with the host system. Use your password you set in step 1 when setting up VNC Server. For more detail, click http://www.realvnc.com/gettingstarted.html
Hint: Having trouble with this step? Not Connecting?
If you cannot connect at this point, something went wrong. Make sure you connected properly in Step 3 (Local LAN testing). Have someone at the remote location check that the host system is power up and that you have the VNC server enabled and listening on the host system as described in step 1. You should also check that you are using the proper domain name, and that you check that the ports are opened properly in the router.
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