Computer Security question

3" (20%) For SSH (Secure Shell), the server listens on port 22 for incoming connection request. The user end is on a TCP port number above 1023. To build a packet filter rule set allowing inbound and outbound SMTP traffic, you generate the following rule set: Rule Direction Src Addr Dest Addr Protocol Dest Port Action External Internal Internal ExternalTCP Internal External External Internal 1023Permit TCP TCP 1023Permit Either AnyAnyAny Any Deny a. Describe the effect of each rule. b. Your host IP address is 172.16.1.1. Someone try to access from a remote host with IP address 192.168.3.4 to the SSH server on your host. And a user on your host sends an email to the remote system. Four packets as shown. Indicate which packets are permitted or denied and which rule is used in each case. Packet Direction Src Addr Dest Addr Protocol Dest Port Action In 192.168.3.4 172.16.1.1 TCP Out 172.16.1.1 192.168.3.4 TCP 172.16.1.1 192.168.3.4 TCP 1234