Technology
DNS PTR Records: Reverse Lookups and Who Controls Them
A DNS PTR record associates an address in the reverse-DNS namespace with a domain name. Cloudflare explains the difference between an ordinary lookup…
Tag: Network Security
Technology
DNS SOA Records: Serial Numbers, Timers and Zone Ownership
A DNS SOA record contains administrative information for a DNS zone. Cloudflare explains that this start-of-authority record includes the primary nameserver, an administrator…
Technology
Secondary DNS: Redundancy, Zone Transfers and Operational Checks
Secondary DNS maintains another authoritative copy of a DNS zone in an appropriate primary-and-secondary arrangement. Cloudflare explains the roles of primary and secondary…
Technology
Hardware VPN: Evaluate Remote Access, Updates and Recovery
A hardware VPN uses a network appliance to support an approved virtual-private-network arrangement. The useful buying question is not which box looks most…
Technology
Email Deliverability Best Practices: Authentication, List Quality and Feedback
Email deliverability best practices concern whether the receiving system accepts and handles a message as intended. They do not guarantee inbox placement. Google’s…
Technology
Email Sender Authentication: SPF, DKIM and DMARC Have Different Jobs
Understand email sender authentication with SPF, DKIM and DMARC. Inventory all sending services and verify results before enforcing a policy.
Technology
SMTP Protocol AUTH: Sign-In Is Not Domain Authentication
Understand SMTP AUTH, transport encryption and domain authentication as separate layers. Use provider-approved credentials and safe diagnostics.
Ethical Hacking
Unified Threat Management: What Small Teams Should Evaluate
Unified threat management generally describes a security appliance or service combining several network-security functions under one management arrangement. The exact features vary by…
Ethical Hacking
Secure Home Wi-Fi for Remote Work: A Maintenance Checklist
Securing home Wi-Fi for remote work starts with the router and its administration. Identify the model, support status and official instructions. Keep firmware…