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How to - Install certificates to access the internet at TWC


School internet connection requirements


Catholic Education SA mandates all devices wishing to use the school's internet connection MUST have the required security certificate present.
This certificate helps keep our students and staff safe and ensures that the school internet connection is being used in accordance with the ICT policies and user agreements.

The certificate is only needed to access the internet at school and is not used for any other internet connection, such as at home.


There are 2 ways to install the needed certificate on your BYOD laptop:

Method #1 (Quickest) Install the certificate manually (BYOD laptops, tablets or phones)

The CESA certificate link will only work when connected to the TWC wifi network and will not work at home. 
While it is more time consuming, it does not connect your device to the schools Company Portal.

Click the links below to download the certificates to your device:

 Download CESA certificate here  Use the instructions below. MUCH simpler than those on the CESA page.

Instructions to install the certificates:

  1. Windows laptops (CESA instructions here) 
  2. Macbook (TWC instructions here-CESA/Linewize the same process once certificate has been downloaded)
  3. iPad/iPhone (CESA Instructions here)
  4. Android tablet/phone (CESA instructions here)

CESA certificate page

Method #2  Automatic install using the schools Company Portal

This automatically installs the required certificates.
The Company portal provides an easy method to install school software such as Naplan or SACE browsers and can be setup at home OR school.

  1. Windows laptop instructions (here)
  2. Macbook instructions (here)

TWC Company Portal

If you need assistance joining the company portal or installing the certificates, please visit the ICT department or log a ticket using the 'Contact ICT Support' tab at the top of the page.

Tenison Woods College respectfully acknowledges the Boandik people are the First Nations people of the Mount Gambier South Eastern region of South Australia and pay respect to all Aboriginal and Torres Strait Islander people, past, present and emerging.