I need to configure an ubantu firewall to do this things When firewall is runnin

Question

I need to configure an ubantu firewall to do this things

When firewall is running, (20 points)
The local computer (the computer where the firewall is running) can
   (5) Ping other computers on the local network;
   (6) Remotely log into (e.g., ssh) other computers on the local network;
   (7) Visit web servers on remote networks (e.g., www.google.com).

The local computer cannot
   (8) Ping other computers on remote networks (e.g., ping www.google.com);
     Make sure to choose a remote computer which is not behind a firewall blocking incoming ping messages.
   (9) Traceroute a computer on remote networks (e.g., traceroute www.yahoo.com).

Other computers on the local network cannot
   (10) Ping the local computer;
   (11) Remotely log into (e.g., ssh) the local computer.

Explanation / Answer

1) When firewall is running,the local computer can remotely log into (e.g., ssh) other computers on the local computers.

2) The local computer can't ping other computers on remote networks (e.g., ping www.google.com).

3) Other computers on the local network can't remotely log into the local computer.

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