⚠️ Version Policy Note
H2O no longer uses version tagging since January 2020. The master branch is considered stable.
| Resource | URL | Status |
|---|---|---|
| Official Website | https://h2o.examp1e.net/ | ✅ Online |
| Documentation | https://h2o.examp1e.net/install.html | ✅ Available |
| GitHub Repository | https://github.com/h2o/h2o | ✅ Active |
| Installation Guide | https://h2o.examp1e.net/install.html | ✅ Available |
| Configuration Reference | https://h2o.examp1e.net/config.html | ✅ Available |
| Resource | URL | Status |
|---|---|---|
| Community Docker Image | https://hub.docker.com/r/micrograils/h2o | ✅ Available |
| Docker Image Source | https://github.com/micrograils/h2o | ✅ Available |
| Debian Package Tracker | https://tracker.debian.org/h2o | ⚠️ Removed (May 2025) |
| RPM Package (OKey) | https://rpm.pkgs.org/9/okey-x86_64/h2o-2.2.6-2.el9.x86_64.rpm.html | ✅ Available |
| Homebrew Formula | https://formulae.brew.sh/formula/h2o | ✅ Available |
| FreeBSD Port | https://www.freshports.org/www/h2o | ✅ Available |
| Resource | URL | Notes |
|---|---|---|
| Security Contact | h2o-vuln@googlegroups.com | Report vulnerabilities |
| GitHub Security Advisories | https://github.com/h2o/h2o/security/advisories | CVE database |
| Debian Security Tracker | https://security-tracker.debian.org/tracker/source-package/h2o | CVE status |
| CVE-2025-8671 | https://security-tracker.debian.org/tracker/CVE-2025-8671 | HTTP/2 DoS |
| CVE-2024-45397 | https://security-tracker.debian.org/tracker/CVE-2024-45397 | TLS 1.3 + QUIC |
| CVE-2024-25622 | https://security-tracker.debian.org/tracker/CVE-2024-25622 | Header bug |
| Resource | URL | Notes |
|---|---|---|
| H2O Manual | https://h2o.examp1e.net/ | Main documentation |
| HTTP/3 Implementation | https://github.com/h2o/h2o/blob/master/docs/QUIC.md | QUIC specifics |
| Mruby Integration | https://github.com/h2o/h2o/blob/master/docs/mruby.md | Scripting guide |
| libh2o Documentation | https://github.com/h2o/h2o/blob/master/include/h2o.h | Library API |
For comparison or if H2O doesn’t meet your needs:
| Server | Link | Use Case |
|---|---|---|
| Nginx | Nginx | High-performance, reverse proxy |
| Caddy | Caddy | Easy setup, automatic HTTPS |
| Apache | Apache | Feature-rich, .htaccess support |
| HAProxy | HAProxy | Load balancing |
| OpenLiteSpeed | OpenLiteSpeed | High-performance PHP |
| Distribution | Status | Notes |
|---|---|---|
| Debian 12 (Bookworm) | ⚠️ Available (vulnerable) | 5 unpatched CVEs |
| Debian 13 (Trixie) | ❌ Removed | No maintainer (May 2025) |
| Ubuntu 22.04/24.04 | ⚠️ May be outdated | Check PPA |
| RHEL 9 | ✅ OKey repository | Version 2.2.6 |
| Fedora | ❌ Not in EPEL | Build from source |
| macOS | ✅ Homebrew | Tracks master |
| FreeBSD | ✅ Port available | www/h2o |
Any questions?
Feel free to contact us. Find all contact information on our contact page.