DNS & Time Sync Validation

Ensure reliable DNS resolution and accurate time synchronization before applying security policies.

Tools Used

Steps Taken

  1. Verified DNS resolution using Diagnostics → DNS Lookup (queried microsoft.com).
  2. Confirmed upstream DNS servers were reachable via Diagnostics → Ping.
  3. Ensured Unbound DNS Resolver was active and listening on LAN.
  4. Checked System → Settings → General for correct DNS server entries.
  5. Validated NTP sync via System → Settings → Time and Diagnostics → NTP Status.
  6. Confirmed system time was accurate and synchronized with upstream NTP servers.

Screenshot: DNS Lookup

DNS Lookup result for microsoft.com
Click to view full-size: DNS resolution confirmed for microsoft.com.

Screenshot: Ping to DNS Server

Ping results to upstream DNS server
Click to view full-size: Upstream DNS server reachable via ICMP.

Screenshot: Unbound DNS Status

Unbound DNS Resolver status
Click to view full-size: Unbound DNS Resolver active and listening on LAN.

Screenshot: NTP Sync Status

NTP synchronization status
Click to view full-size: System time synchronized with upstream NTP server.

Screenshot: System Time Settings

System time settings and timezone
Click to view full-size: Timezone and NTP sync source configured correctly.

Outcome

DNS resolution and time synchronization validated successfully. Firewall is now ready for policy enforcement, logging, and audit-ready operations. This step ensures that all future security events are timestamped accurately and that upstream services are reachable.