"The ipad could not be restored because the firmware was corrupt" Error 1403, Error 3194

I have iPAD 2[wifi only] and upgraded it to 9.3.2 but after one day it's stuck in boot looping. i tried the Recovery and DFU mode and try to restore it through iTunes, but it doesn't work. When i used the old iOS versions like 9.3 or 9.3.1 it says "Error 3194"[clear the host file but doesn't work] and when i used 9.3.2 it says "the ipad could not be restored because the firmware was corrupt". I used many Website to download different IPSW file and try all but no luck. Afterward I used to download it through iTunes, which took 2 hours but after the download is complete, it says "Download is Corrupted due to some unknown error [usually Error 1403]" . Even my Wifi is working perfectly and there is no issue in it. After that i put the downloaded IPSW in the directory[ Users\<User>\AppData\Roaming\Apple Computer\iTunes\iPhone Software Updates for windows 7 users ] now itunes will detect the IPSW but still the same error. Now it seems like my IPAD has error 56 😟 . Please help.