1. Download Cisco Packet Tracer

2. Unzip the file and run ./install

3. Add wheezy archive to /etc/apt/sources.list

deb http://archive.debian.org/debian wheezy main

4. Update apt

5. Get version number of packages

apt-cache policy libpng12-0
apt-cache policy libssl1.0.0

6. Install correct version

7. Overwrite file

sudo apt install libpng12-0 libssl1.0.0
sudo cp -i /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0 /opt/pt/bin/

8. Run Packet Tracer

cd /opt/pt/bin

9. Copy the .desktop file

cp /opt/pt/bin/Cisco-PacketTracer.desktop ~/Desktop

10. Edit the desktop file from Desktop
Exec=/opt/pt/packettracer %F

11. Change the desktop file to executable

chmod +x ~/Desktop/Cisco-PacketTracer.desktop

12. Move the new shortcut created to the applications folder in order for our new shortcut to show up in the start menu

sudo mv Cisco-PacketTracer.desktop /usr/share/applications

13. Remove the old desktop from /opt/pt/bin1

sudo rm /opt/pt/bin/Cisco-PacketTracer.desktop