For General FAQs, click here.

If you have any questions that are not covered here, ask our Technical Support Team.

Your email will be answered at the earliest. Maximum response time is 24 hours.

• What is my IP Address? How to find out the real IP address?
  You can find it on the main screen of 123Go. Both IP addresses will appear on the screen. Else, the global IP address can be found by opening the following site:
  http://www.whatismyip.com/
  
  
• I am not able to either send or receive files. What could be wrong?
  If you want to receive or send a file to someone you must have a real IP... check your ISP for this. Also the destination IP has to be real also...This is the most secure feature of 123Go. Remember that the remote PC must have 123Go running to be able to receive files from you.
  
  IP addresses are easy to fake as well. The design principles of TCP/IP allow the sender of a packet to specify its IP address. The message will still be routed to its destination using the fake origin address. Return packets would be misrouted, however, because TCP/IP would send responses to the true location of the IP address rather than where it actually came from. This means that IP spoofing is ineffective in situations where you need to interact with a remote server, but very effective in a one-way conversation.
  
  
• What to do if both PCs are behind firewalls and routers?
  Some PCs behind router are unable to transfer. So if you want to use 123Go to transfer files to a remote PC or Laptop, one of the PC needs to have direct access to Internet.
  A router can be configured to give direct access in two ways:-
  1- DMZ host: a machine can be set as a DMZ host which means that all external traffic to the router is redirected to this machine. The router IP becomes this machine public IP and acts like it has direct access.
  2- Port Forwarding: this enables you to redirect traffic coming to the router on a given port to a specific port on a specific machine. For example, mapping router port 2223 to port 34567 (123Go uses this port to transfer files and 31234 port for Chat) on your machine.
  
  Port forwarding is the common technique used by administrators.
  
  Connections can be done between two clients (A & B) in the following cases:-
  1. (A) and (B) is on the same LAN or both have public IPs on the internet.
  2. (A) or (B) has public IP and the other is behind a router.
  3. (A) and (B) are both behind different routers, but at least one of the two routers is configured to allow incoming connections on a specified port.
  
  Connections can't be done if both (A) and (B) are behind different routers without opened ports (this is the default for all routers).
  
  We recommend that the Public PC has firewall/antivirus protection prior to making it public.
  Change your firewall settings to allow 123Go to access Internet so that you can transfer files.
  
  Contact us if you are unable to change your router's settings.
  Click HERE to contact us with your router model number and make so that we can assist you with right solution.
  
  
• How to enable the ports manually?
  123Go automatically handles ports. Registered users can change port settings manually.