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This guide provides step-by-step instructions for installing OpenConnect and establishing a GlobalProtect SSL VPN connection to the Stony Brook University Computer Science network across various Linux distributions.
Step 1: Install OpenConnect
Open a terminal window and run the installation command corresponding to your Linux distribution:
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Distribution
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Installation Command
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Ubuntu / Debian
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sudo apt install openconnect
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CentOS
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sudo yum install openconnect
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Fedora
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sudo dnf install openconnect
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Step 2: Connect to the VPN
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Initiate Connection Command:
Run the following command in terminal (replace username with your actual CS Active Directory User ID):
sudo openconnect --protocol=gp --background --user='cs\username' vpn.cs.stonybrook.edu
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Enter Password:
When prompted with Password:, enter your CS Active Directory password.
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Verify Active Session:
Upon successful login, OpenConnect will display connection status details and return to running in the background:
Connected as 130.245.X.X, using SSL, with ESP in progress
Continuing in background: pid [Process-ID]
Step 3: Disconnect from the VPN
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Locate Process ID (PID):
Find the running OpenConnect process ID using:
pgrep -a openconnectTake note of the numerical process ID (PID) displayed at the beginning of the output line (e.g., 9089).
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Terminate the Connection:
Terminate the background process using the identified PID:
sudo kill <Process-ID>Example: sudo kill 9089
Terminal output will confirm Logout successful and the process will exit cleanly.