When I use my laptop which has to be connected to wifi in the campus network, I encounter some problems as described in some pages:
WiFi password and CA certificate warning windows come out again and again when enable the connection in the edit dialog box.
click ignore and click “Don’t warn me again” But the error keeps coming up.
The solution is
The warning was happening again and again. What I ended up doing was first I did this I clicked the “Choose a Certificate Authority certificate…”
Then I went to “/usr/share/ca-certificates/mozilla/AddTrust_External_Root.crt” and Added that as my certificate.
The certificate error went away but the password prompt for the WiFi did not
So I went to “Edit Connections” and selected my wireless connection.
Then I went to “General” tab and unticked “All users may connect to this network”
No more CA prompt or wireless password prompt.
The certificate error went awayfor me but password prompt for the WiFi doesn’t disappear. My solution is to open the browser and then login interface (from TAMK server) automatically, then the password prompt dialog box disppear and I can loginnot to internet. Try to ping in the terminal: ping http://www.google.com or other sites, it success to access.