A Firewall is a security system that monitors and controls network traffic according to predefined rules. It can help block unauthorized connections while allowing legitimate communication between trusted devices, applications, and networks. Firewalls may be implemented as software, hardware, or cloud-based services and are commonly used in both home and enterprise environments. A properly configured firewall adds an important security layer against many network-based threats. Read the full article to learn how a Firewall works and why it matters for network security.
How to Organize Zones with Cloud DNS Across Multiple Projects
Cloud DNS is easier to operate across multiple projects when zones are organized by ownership, environment, and failure boundary instead of being placed in one oversized DNS zone.
How should DNS zones be divided?
Start with the question: who is responsible for this namespace?
A central infrastructure team might own example.com, while product teams receive delegated zones such as app.example.com, api.example.com, or partners.example.com. Large organizations can also separate production and non-production namespaces when that improves access control and reduces accidental changes.
The goal is not to create the maximum number of zones. It is to create boundaries that match how teams deploy, approve changes, and recover services.
What problems does zone delegation solve?
Delegation reduces the blast radius of DNS mistakes. A team working on api.example.com does not need permission to modify mail records, the corporate website, or unrelated product domains.
It also supports cleaner automation. Infrastructure-as-code pipelines can update project-specific zones using dedicated credentials, while high-risk parent-zone changes remain under stricter review.
A practical multi-project model
Consider a company with three projects:
- shop.example.com for e-commerce;
- portal.example.com for customer accounts;
- dev.example.com for non-production systems.
Each project can have a defined owner, change process, TTL policy, and recovery plan. The parent zone then contains only the records and delegations needed to connect those namespaces.
When comparing providers such as ClouDNS, look beyond the number of supported zones. Evaluate how easily your team can maintain consistent records, backups, access rules, migration procedures, and secondary DNS where required.
What should be documented?
Keep a simple inventory for every zone: owner, purpose, registrar, authoritative name servers, critical records, expected TTLs, and rollback instructions.
Key takeaway
Good Cloud DNS organization mirrors real operational responsibility. Delegate where ownership is clear, isolate environments when useful, automate repeatable changes, and keep the parent zone intentionally small.
DMARC: Strengthening Email Security Against Spoofing & Phishing
DMARC (Domain-based Message Authentication, Reporting, and Conformance) is an essential email security protocol that protects domains from email spoofing, phishing attacks, and unauthorized email use. By enabling domain owners to specify how to handle emails that fail authentication checks, DMARC helps prevent cybercriminals from exploiting an organization’s email domain.
How DMARC Works
- Authenticates emails using SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail).
- Defines policies for handling emails that fail authentication (none, quarantine, or reject).
- Provides reports on email authentication results, helping organizations detect and mitigate fraudulent activities.
Benefits of Implementing DMARC
✔ Prevents Email Spoofing – Ensures only authorized senders can use your domain.
✔ Enhances Brand Protection – Reduces the risk of phishing attacks targeting customers.
✔ Improves Email Deliverability – Authenticated emails are less likely to be marked as spam.
✔ Provides Visibility & Control – Helps monitor email activity and detect threats in real time.
As email threats continue to rise, implementing DMARC is crucial for businesses to secure their communication channels and maintain trust with customers.
Find out how DMARC can protect your email domain from cyber threats!
UDP – Definition
The short acronym UDP stands for User Datagram Protocol, which is a communications protocol. It is mainly used for setting low-latency and loss-tolerating connections between applications on the internet. UDP is great for speeding up transmissions because it allows the transfer of data before an agreement is supplied by the recipient. Find out more interesting details about UDP!
What does a CAA record mean?
The CAA record stands for Certification Authority Authorization. It is a valuable DNS Resource Record that lets the owner of a domain name specify which Certification Authorities (CAs) are allowed to issue a certificate for the domain. With it, you can achieve better control of the process of issuing certificates. Find more details about the CAA record!
Ping command explained
The Ping command is a computer network administration software utility. It is utilized to test the reachability of a host on an Internet Protocol network. The great thing about it is that it is available for almost all popular operating systems (OS) with networking capabilities. It is very easy to use, and it can provide you with a lot of valuable information. Read more about the Ping command!