Freedom251 › Internet Filtering Software
modDNS
What modDNS is
modDNS is an open-source DNS filtering service that blocks ads and trackers by filtering DNS queries. Users can combine preset and individual lists from Hagezi, OISD, and other providers, then add allowlist or denylist rules with wildcard patterns. Separate profiles support different devices or purposes and provide unique identifiers. Profiles work with DNS-over-HTTPS, DNS-over-TLS, and DNS-over-QUIC, with DNSSEC enabled. Query logging is disabled by default. If enabled, users can choose retention, review requests by device, and download logs. The service states that it does not log IP addresses; device IDs and retention are optional, with retention from 1 hour to 30 days. Cure53 independently audited modDNS in 2025, and the project’s implementation is open source. Blocklists update every 1–3 hours. modDNS is included in IVPN Plus for $80 a year and IVPN Pro Suite for $100 a year, with no standalone plan. It filters DNS queries but does not encrypt other network traffic.
Who it suits
It suits users wanting customizable DNS ad and tracker blocking across Windows, macOS, Linux, iOS, Android, browsers, routers, or firewalls through IVPN bundles.
What it does well
- Custom allowlists, denylists, and wildcards
- Multiple encrypted DNS protocols
- Query logging off by default
- Open-source implementation
- Independent Cure53 audit available
What to know first
- No standalone plan
- Does not encrypt other network traffic
- Aggressive lists may break legitimate services
- New malicious domains may be missed initially
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| IVPN Pro Suite | $100/YEAR · IVPN / 10 Devices · Mailx · modDNS · Portmaster Pro | $100 a year |
| IVPN Plus | $80/YEAR · IVPN / 5 Devices · Mailx · modDNS | $80 a year |
As app.moddns.net lists them, read 11 Oct 2026. The maker's own page has the final word.
Verdict
modDNS offers configurable DNS filtering, profiles, and optional query reporting across many device types. Access requires IVPN Plus or Pro Suite, and it does not protect non-DNS network traffic.
Facts from modDNS's own pages
- Access
- modDNS is included in IVPN Plus and Pro Suite, and the page says no standalone plan is available. · app.moddns.net, 11 Oct 2026
- Blocklists
- Users can combine presets and individual lists from Hagezi, OISD, and other providers. · app.moddns.net, 11 Oct 2026
- Blocklist updates
- Blocklists update every 1–3 hours, and the page says new malicious domains may not be blocked immediately. · app.moddns.net, 11 Oct 2026
- Custom rules
- Users can add allowlist and denylist entries, including wildcard patterns. · app.moddns.net, 11 Oct 2026
- Limitations
- The service filters DNS queries but does not encrypt other network traffic, and aggressive blocklists may break legitimate services. · app.moddns.net, 11 Oct 2026
- Open source
- The entire modDNS project is open-source and its implementation is available for review. · app.moddns.net, 11 Oct 2026
- Platforms
- The service lists system-wide support for Windows, Mac, Linux, iOS, and Android, plus supported browsers and router/firewall setups. · app.moddns.net, 11 Oct 2026
- Privacy
- The page states that IP logging is none, while device ID and log retention are optional, with retention from 1 hour to 30 days. · app.moddns.net, 11 Oct 2026
- Profiles
- Users can create separate DNS profiles for different devices or purposes, each with a unique identifier. · app.moddns.net, 11 Oct 2026
- Protocols
- Profiles support DNS-over-HTTPS, DNS-over-TLS, and DNS-over-QUIC, and DNSSEC is enabled. · app.moddns.net, 11 Oct 2026
- Purpose
- modDNS is an open-source DNS filtering service that blocks ads and trackers at the DNS level. · app.moddns.net, 11 Oct 2026
- Query monitoring
- Query logging is disabled by default; when enabled, users can set retention, review requests by device, and download logs. · app.moddns.net, 11 Oct 2026
- Security audit
- The service was independently audited by Cure53 in 2025, with the report available to review. · app.moddns.net, 11 Oct 2026
Where modDNS stands on Freedom251
- Internet Filtering Software#49 of 65