I have a web app running on apache tomcat 7.0.69 that is only accessible on an internal network via VPN. If I try to reach the site on VPN enabled laptop/desktop computer, everything works fine. However, if I try to access the site on VPN enabled mobile device (ipad, iphone, android etc...), I see a server not found error.
If I try to access other internal sites on the mobile devices, they all work fine, so I think that the problem is with my site specifically.
I am struggling with how to troubleshoot this issue. Is it possible that our IT set up a firewall for this site for the mobile browsers specifically? Could there be a blocked port on my server that is not accessible to mobile browsers?
Any advice on things to try would be much appreciated.
EDIT: Here are the exact error messages:
iPad: 'Safari cannot open the page because the server cannot be found.'
iPhone: 'Safari cannot open the page because the server cannot be found.'
Samsung: This one is apparently not on the VPN, working on this then I will update with error.