Computer Science Please tell 3 hardening recommendations each and how they are important for the SMTPS protocol using IIS on Windows and Postfix application on Linux
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- 8. Write the iptables command:Set firewall http INPUT policy to DROP Set firewall telnet OUTPUT policy to ACCEPT 8.7.3Principles of Information Security Q : Which of the following is a disadvantage of Circuit-level gateway firewalls? 1) They’re complex in architecture or 2) They do not filter individual packets 3) - Can only handle TCP connections – new extensions proposed for UDP Explain your answer.Define the following protocols, how they work, and give example how and where to implement it. 1. PEM - Privacy Enhanced Mail 2. IPsec - Internet Protocol Security 3. VPN – virtual private networks 4. SET- Secure Electronic Transactions 5. DMARC-Domainbased Message Authentication, Reporting and Conformance 6. Terminal Access Controller Access Control System (TACACS+ ) 7. Kerberos 8. S/mime - Secure/Multipu rpose Internet Mail Extensions 9. DTLS - Datagram Transport Layer Security 10. PKI – public key Infrastructure 11. Digital watermarking and what is blind, semi-blind, non-blind watermarking 12. SSH , SSL/TLS
- Q.2.1 List all the steps of a DNS lookup for www.iie.ac.za Q.2.4 VPN concentrator aggregates hundreds or thousands of VPN connections.State whether the statement is true or false and justify your response.In what ways might DNS tunneling be blocked? How can you recognize port scanning attempts and block them? DDoS and Mitigation Strategies: Encryption vs. Hashing What is TCP/IP? To what end should DNS be watched? Why is TCP/IP related to MAC addresses and ARP? WAF? Distinctions in policy, procedure, and guidelines Inquire about and propose the following IOCs:What measures may be taken to prevent DNS tunneling? How can you recognize port scanning attempts and block them? Comparison of DDoS mitigation with encryption hashing What is TCP/IP? What is the point of doing DNS monitoring? What is the relationship between MAC addresses, ARP, and TCP/IP? WAF? Disparities in policies, procedures, and guidelines Examine the following International Olympic Committees and propose them if you agree with them:
- 22. Checksum, as used in the transport layer, can detect all errors.a. Trueb. False 23. Which of the following protocols cannot be used by a user agent to retrieve email messages fromits SMTP server?a. POP3b. SMTPc. IMAPd. HTTPe. All of the aboveIn what ways might DNS tunneling be blocked? How can you recognize port scanning attempts and block them? Comparison of DDoS mitigation with encryption hashing The TCP/IP Protocol Suite: An Explanation What's the point of keeping an eye on DNS? What is the relationship between MAC addresses, ARP, and TCP/IP? WAF? Distinctions in policy, procedure, and guidelines Please have a look at the following IOCs and provide some suggestions:86. Which of the following protocols is used by email server to maintain a central repository that can be accessed from any machine? a. POP3 b. IMAP c. SMTP d. DMSP
- In addition to port 25 for SMTP, what other "well-known" port numbers are often used for email?In what ways might DNS tunnelling be blocked? In what ways might port scanning be detected and avoided? Comparison of DDoS mitigation with encryption hashing Explanation of TCP/IP What is the point of doing DNS monitoring? What is the relationship between MAC addresses, ARP, and TCP/IP? WAF? Distinctions in policy, procedure, and guidelines IOCs to research and propose:1) What is the difference between a basic packet filtering firewall and a stateful packet filteringfirewall?2) Which network traffic uses TCP protocol and which uses UDP protocol? Can someone take the time to answer these for me? I'm doing a HW and am stumped.