The cause of iTunes Error 3194This error 3194 usually occurs when your iTunes program tries to validate the downloaded restore file which is the (.ipsw) and it can't reach the Apple's server for the validation process. This usually happens when something is blocking the connection such as your firewall, antivirus or might be your hosts file.
How To Fix iTunes Error 3194? Please Follow These StepsSolution 1:
Step 1: Quit iTunes
Step 2: Download TinyUmbrealla. (Check for the latest version or previous version if needed)
Step 3: Open TinyUmbrealla
Step 4: Choose your iPhone and click "Advanced".
Step 5: Untick "Set Hosts to Cydia on Exit".
Step 6: Apply Changes.
If steps above doesn't work on your please proceed below and hope this will finally solves your problem
Solution 2: Modifying your hosts file.
Note: make it sure that you have the admin's privilege so that you can edit your hosts file.
For Windows users: go to "C:\Windows\system32\drivers\etc\hosts" and then remove any related or same to this line 18.104.22.168 gs.apple.com.
For Mac OS X users: "/etc/hosts” or “/private/etc/hosts"
Note: It is also best to disable your Firewall and Antivirus upon doing the steps above.
That's it! Hope this solves your problem, if not you can leave your message below and we will try to help you as humanely as possible.