Setting up your Router to Fix the "425 code"

DynDNS Explained

• Note: You’ll want to pay close attention here.

So what about this whole “DYNDNS” thing? For those of you who don’t know what this is, it’s a service that you can set up to point internet traffic to your computer when your external IP address is “Dynamic” or changes from time to time—as is the case with most public IP Addresses given by your Internet Service Provider (ISP). The set-up of such service “can” be free with a little work, but this falls outside the scope of this article at this time, another article will explain this in the future.

External IP Address

Your external IP address is the address given to you by your ISP. It should not in any way resemble your server’s IP address, or the IP address of any computer on your network. For the purpose of this Wiki we will not address the Subnet Masks, as it’s not relevant to this topic.

Internal vs. External IP Address

The internal “Private” IP address of a Network “usually” starts with 192.168.X.X (where “X” can vary), and is assigned to your computer(s) so they can talk to the Internet via the external “Public” IP address. The external address can be anything in all reality, for this Wiki we’ll pretend the outside address is 84.25.240.74.

Device Specific Instructions

Please send a request for your device to be added if you don’t see it, and we’ll do our best to add it.

Apple Airport Extreme

1. Under the Network tab of the Airport Utility there’s a section titled "port settings."
2. Click the "+" button to add a setting, either select "FTP access" from the dropdown, or add it.
3. Under both "Private TCP ports" and "Public TCP Ports" put in 21 (standard FTP Port).
   • Note: You do NOT need to allow UDP ports as they are not used for FTP.
4. Under Private IP address type the IP address of the destination computer (FTP server).
   • Note: setting a static IP address on the FTP server is strongly suggested.
5. Repeat step 3 and allow port 990 (standard TLS port).
6. Repeat step 3 one last time and
   • Under the TCP ports fill in the range of the FZS passive ports: i.e. "60000-65000" just like that.
   • Use your FZS ports. No spaces, no other characters.
7. Apply the settings to the router, and allow it to reset.
8. Test the connection.