The VPN software allows you not only to connect to CESGA in a secure way but also to access internal resources that you can not reach otherwise.
Site: CESGA-VPN (already pre-configured)
Username: enter your username (eg. uscfajlc)
Password: enter your password
wget http://bigdata.cesga.es/files/snx
chmod a+x snx
sudo dpkg --add-architecture i386; sudo apt update
sudo apt install libaudit1:i386 libbsd0:i386 libc6:i386 \
libcap-ng0:i386 libgcc-s1:i386 libpam0g:i386 libstdc++5:i386 \
libx11-6:i386 libxau6:i386 libxcb1:i386 libxdmcp6:i386
sudo ./snx -s secure.cesga.es -u my_username