NTLM Authentication & Smoothwall
We've recently started to have an issue with various students not being able to access the internet and an NTLM authentication popup box displaying on screen. If the users enter their logon details the issue doesn't resolve itself... the only real way to get them up and running is to reset their username/password within AD. This only appears to be happening with Windows 7 clients and is totally random (3 students here, 5 students there etc).
About a week ago we had a Smoothwall engineer access our system to carry out some much needed maintenance and apply an iOS 6 patch to allow BYOD to work correctly.
Anyone have any similar issues or ideas about whats gone wrong?