求助iphone 4s 9.35降级出现这些问题

WARNING: Unable to find BbSkeyId node
Request URL set to https://gs.apple.com/TSS/controller?action=2
Sending TSS request attempt 1... TSS server returned: <html>
<head><title>403 Forbidden</title></head>
<body bgcolor="white">
<center><h1>403 Forbidden</h1></center>
<hr><center>Shield</center>
</body>
</html>
Failed to connect to 17.151.36.30 port 443: Timed out
Request URL set to http://17.171.36.30/TSS/controller?action=2
Sending TSS request attempt 11... Failed to connect to 17.171.36.30 port 80: Timed out
Request URL set to http://17.151.36.30/TSS/controller?action=2
Sending TSS request attempt 12... Failed to connect to 17.151.36.30 port 80: Timed out
Request URL set to https://gs.apple.com/TSS/controller?action=2
Sending TSS request attempt 13... TSS server returned: <html>
<head><title>403 Forbidden</title></head>
<body bgcolor="white">
<center><h1>403 Forbidden</h1></center>
<hr><center>Shield</center>
</body>
</html>
Failed to connect to 17.151.36.30 port 80: Timed out
Request URL set to https://17.171.36.30/TSS/controller?action=2
Sending TSS request attempt 14... Failed to connect to 17.171.36.30 port 443: Timed out
Request URL set to https://17.151.36.30/TSS/controller?action=2
Sending TSS request attempt 15... Failed to connect to 17.151.36.30 port 443: Timed out
ERROR: TSS request failed: Failed to connect to 17.151.36.30 port 443: Timed out (status=-1)
ERROR: Unable to send TSS request
ERROR: Unable to get SHSH blobs for this device