A server with the specified hostname could not be found

Question

When I try to submit my app on the App Store through Xcode I got this  error      A server with the specified hostname could not be found    Is this temporary error at Apple or something to do with  Xcode   Is anyone else facing this problem

User · Answer

If the problem occured in a MacOS project  as  nstein commented in this answer just go to your Target s Signing  amp  Capabilities and allow Incoming and Outgoing network options

User · Answer

It might be DNS Pollution issue  at least for my case  in China    If you re also in China or some places that has DNS Pollution issue  you might solve this by modifying the DNS  to 8 8 8 8 as an example  for your Mac as well     I got this error inner my iPad App  amp  this happens randomly  it s such boring  Keep trying is not a good solution for me  though it might works somehow  Finally  I just changed my Wi-Fi DNS and no more error now  Steps    Your device  Settings Wi-Fi Choose connected Wi-Fi pot Press DHCP DNS Set to 8 8 8 8

User · Answer

Just to share my experience  It was caused by the Sharing   Internet Sharing inside System Preferences  I was testing and created NAT64 Network unchecking it solved my problem

User · Answer

A server with the specified hostname could not be found   I faced the same problem  In my case it was because of-    Server was not configured properly  Server subscription has been expired   Contacting to server hosting company resolve my problem   I think this is not temporary error at apple or something to do with Xcode

User · Answer

I got this error message when     from my URL is missing   Hope this help someone   ex  actual URL is  https   www myweb com login   My URL which  https   www myweb comlogin   caused this error

User · Answer

First of all check your internet connection   go to safari and check by searching something on google dont try google com only   because it can be cached   If it is working fine  then try now in your app  It must work  This is fired while not having proper internet connection

User · Answer

I faced the same problem  it turned out to be VPN related  If you are testing on a device against a corporate network  chances are your Mac has proper VPN set up  but your phone does not  Connect phone to the corporate VPN for your apps deployed to device to see corporate servers

User · Answer

I restarted my MacBook Pro and then I build again  the error was fixed

User · Answer

For me it was an issue with enabling Outgoing connections in Capabilities tab

User · Answer

Keep Trying   I have had this a few times  including today   and each time  without changing anything  it has worked when I tried again    Sometimes the 2nd time  other times 20 minutes later

User · Answer

I received A server with the specified hostname could not be found   I figured out my MacOS app had turned on App Sandboxing  The easiest way to avoid problem is to turn off Sandbox

User · Answer

Turn off the push notification  Then Restart your XCode and Turn back ON the Push Notification  It works for me

User · Answer

I faced same problem  Actually i face it often  Following three steps work for me always   Change DNS to 8 8 8 8 and 4 2 2 2 Open net properties and change    https proxyPort 443  to  https proxyPort 80   You can find net properties here  Applications Xcode app Contents Applications Application Loader app Contents MacOS itms java lib net properties Open Application Loader- Preferences- Advanced and uncheck Signiant and Aspera  Make sure DAV is checked    Thants all  Now you can submit app using both application loader and Xcode

User · Answer

In Xcode  select Target -  Capabilities  and check  Outgoing Connections  Client   to enable App Sandbox

User · Answer

I faced this issue when we changed from one domain to another for API service   Restarting the network router modem fixed this issue

User · Answer

That fixed the problem for me  when trying to upgrade to El Capitan   sudo softwareupdate --clear-catalog

User · Answer

I got this message when the device has mobile data turned on and no wifi connection  but the internet is not properly connected   Try to connect to a wifi network with an internet connection or turning off the mobile data

[ios] A server with the specified hostname could not be found

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