These mean iTunes or Finder could not reach Apple's update and verification servers during the restore. Restoring the connection resolves them. Jump to your situation below or work through the methods in order.
iPhone restore errors 17, 3014 and 3200 mean iTunes or Finder could not reach Apple's update and verification servers while restoring or updating. The restore needs to contact Apple to verify firmware, and anything that blocks that connection triggers these codes: no internet, a VPN or proxy, security software intercepting the connection, a modified hosts file redirecting Apple's servers, or an outdated iTunes. The fix is to clear the path to Apple: confirm the internet connection works, disable any VPN or proxy, remove gs.apple.com entries from the hosts file, allow iTunes or Finder through the firewall and antivirus, and make sure the tool is up to date. Once the computer can reach Apple's servers, the verification completes and the restore proceeds.
A restore is not purely local: iTunes or Finder must contact Apple to verify the firmware for your device. Errors 17, 3014 and 3200 mean that contact failed, so the tool could not confirm the build and stopped.
The block is somewhere on the network path to Apple: the connection itself, a VPN or proxy diverting it, security software filtering it, or a hosts file pointing Apple's address somewhere wrong. Clearing each of those, and updating the tool, restores the path.
“Errors 17, 3014 and 3200 are the restore trying to phone home to Apple and not getting through. So I clear the path, one thing at a time. Is the internet actually up? Is there a VPN or proxy in the way, turn it off. Is there a gs.apple.com line in the hosts file redirecting Apple, delete it. Is antivirus or a firewall filtering iTunes, allow it. And make sure iTunes is current. Once the computer can actually reach Apple's servers, the verification goes through.”
gs.apple.com from the hosts file:C:\Windows\System32\drivers\etc\hosts (Windows) /etc/hosts (Mac)
17, 3014 and 3200 mean the computer could not reach Apple's servers to verify the firmware. Confirm the internet works, disable any VPN or proxy, remove gs.apple.com lines from the hosts file, and allow iTunes or Finder through the firewall and antivirus. Update the tool, then retry.
If the connection is clean and iTunes is current but the server errors persist, Apple's servers may be briefly busy, or a corporate network may filter them; trying again later or on a home network confirms whether it is the network. You can also submit your error to us for a tailored fix.