About Me
MikroTik Certified Security Engineer (MTCSE)
1 Introduction to Network Security
1-1 Understanding Network Security
1-2 Importance of Network Security
1-3 Overview of MikroTik Security Solutions
2 Network Security Fundamentals
2-1 Network Threats and Vulnerabilities
2-2 Security Policies and Procedures
2-3 Risk Management and Assessment
2-4 Security Controls and Countermeasures
3 MikroTik RouterOS Basics
3-1 RouterOS Overview
3-2 RouterOS Installation and Configuration
3-3 Basic RouterOS Commands
3-4 User Management and Access Control
4 Firewall and NAT Configuration
4-1 Introduction to Firewalls
4-2 Firewall Rules and Policies
4-3 Network Address Translation (NAT)
4-4 Advanced Firewall Techniques
5 VPN Configuration and Management
5-1 Introduction to VPNs
5-2 Site-to-Site VPN Configuration
5-3 Remote Access VPN Configuration
5-4 VPN Security Best Practices
6 Wireless Security
6-1 Wireless Network Threats
6-2 Wireless Security Protocols
6-3 MikroTik Wireless Security Configuration
6-4 Wireless Intrusion Detection and Prevention
7 Traffic Shaping and QoS
7-1 Introduction to Traffic Shaping
7-2 Quality of Service (QoS) Concepts
7-3 Traffic Shaping and QoS Configuration
7-4 Monitoring and Tuning QoS
8 Intrusion Detection and Prevention
8-1 Introduction to Intrusion Detection Systems (IDS)
8-2 Introduction to Intrusion Prevention Systems (IPS)
8-3 MikroTik IDSIPS Configuration
8-4 Analyzing and Responding to Alerts
9 Security Monitoring and Logging
9-1 Importance of Security Monitoring
9-2 RouterOS Logging Configuration
9-3 Analyzing Logs for Security Incidents
9-4 Log Retention and Management
10 Advanced Security Topics
10-1 Secure Routing Protocols
10-2 Secure DNS Configuration
10-3 Network Segmentation and Isolation
10-4 Security Automation and Scripting
11 Certification Exam Preparation
11-1 Overview of MTCSE Exam
11-2 Exam Format and Structure
11-3 Study Tips and Resources
11-4 Practice Exam and Review
Secure DNS Configuration

Secure DNS Configuration

Secure DNS Configuration is essential for protecting your network from DNS-based attacks and ensuring the integrity and confidentiality of DNS queries. This page will cover key concepts related to Secure DNS Configuration, including DNSSEC, DNS Filtering, DNS over HTTPS (DoH), DNS over TLS (DoT), Split DNS, DNS Caching, DNS Redirection, DNS Blacklist, DNS Whitelist, and DNS Logging.

1. DNSSEC (Domain Name System Security Extensions)

DNSSEC is a set of extensions that add security to the DNS protocol by enabling DNS responses to be authenticated. It ensures that DNS data has not been tampered with and that the responses are from legitimate sources.

Example: Think of DNSSEC as a digital signature on a document. Just as a signature verifies the authenticity of a document, DNSSEC verifies the authenticity of DNS responses.

2. DNS Filtering

DNS Filtering involves blocking or allowing DNS queries based on predefined rules or lists. It helps in preventing access to malicious or inappropriate websites.

Example: Imagine DNS Filtering as a bouncer at a nightclub who checks IDs and only allows entry to those on the guest list. Similarly, DNS Filtering allows or blocks DNS queries based on predefined criteria.

3. DNS over HTTPS (DoH)

DNS over HTTPS (DoH) encrypts DNS queries using HTTPS, making them more secure and private. This prevents eavesdropping and tampering with DNS traffic.

Example: Consider DoH as a secure tunnel that protects your DNS queries from being intercepted by third parties, similar to a secure tunnel that protects your mail from being read by others.

4. DNS over TLS (DoT)

DNS over TLS (DoT) encrypts DNS queries using TLS (Transport Layer Security). It provides a secure and private way to resolve domain names.

Example: Think of DoT as a secure phone line that encrypts your conversations, ensuring that no one can listen in on your DNS queries.

5. Split DNS

Split DNS involves configuring different DNS servers for internal and external queries. This allows for different DNS resolutions based on the source of the query.

Example: Imagine Split DNS as a company that has different phone directories for employees and customers. Employees use an internal directory, while customers use an external one.

6. DNS Caching

DNS Caching stores DNS query results temporarily to reduce latency and improve performance. It helps in reducing the load on DNS servers.

Example: Consider DNS Caching as a library that keeps frequently requested books on hand to quickly serve patrons, reducing the need to fetch books from a distant warehouse.

7. DNS Redirection

DNS Redirection involves forwarding DNS queries to a different DNS server or IP address. This can be used for load balancing, failover, or redirecting traffic to specific servers.

Example: Think of DNS Redirection as a traffic cop who directs cars to different routes based on traffic conditions, ensuring smooth traffic flow.

8. DNS Blacklist

DNS Blacklist is a list of domains known to be malicious or inappropriate. DNS queries to these domains are blocked to prevent access to harmful content.

Example: Imagine DNS Blacklist as a list of banned books in a library. Any request for these books is denied to protect readers from harmful content.

9. DNS Whitelist

DNS Whitelist is a list of trusted domains that are allowed to be resolved. DNS queries to domains not on this list are blocked.

Example: Consider DNS Whitelist as a guest list for a private party. Only those on the list are allowed entry, ensuring a secure and controlled environment.

10. DNS Logging

DNS Logging records DNS queries and responses for auditing and troubleshooting purposes. It helps in monitoring DNS activity and detecting potential threats.

Example: Think of DNS Logging as a security camera that records all activities in a room. It provides a record of events for review and analysis.

By mastering these key concepts, you will be well-equipped to configure and manage Secure DNS on MikroTik RouterOS, ensuring the security and reliability of your network.

© 2024 Ahmed Baheeg Khorshid. All rights reserved.