SSH Hardening Rank
SSH Hardening Rank (Reference)
SSH Security Comparison
| Security Method | Description | Security Score (1–100) | Pros | Cons |
|---|---|---|---|---|
| Cloudflare Tunnel (Zero Trust SSH) | SSH without exposing port 22 to internet + identity auth | 97/100 | No open ports, identity-based access | Requires domain + setup cloudflared |
| Use VPN (WireGuard/OpenVPN) for SSH | SSH behind VPN | 95/100 | Strong security | Requires VPN config & open ports |
| UFW Allow Known IP Only | Firewall SSH access by IP whitelist | 92/100 | Very strong if static IP | Painful if IP changes/dynamic/WFH |
| SSH Key Pair Authentication | Login with private/public keys, no password | 85/100 | Strong authentication | Still exposes port 22 to internet |
| Fail2Ban | Blocks brute-force IPs | 75/100 | Good against bots | Can be bypassed with rotating IP attacks |
| Port Knocking | Port opens temporarily after secret knocks | 75/100 | Hides SSH port | Still complicated & niche |
| Disable Root SSH Login | Force login as user first | 70/100 | Reduces risk | Still brute-force exposure |
| Change SSH Default Port | Move 22 → 2222 or random | 40/100 | Reduces noise only | Security by obscurity, not protection |
Security Power Ranking
| Rank | Method | Score |
|---|---|---|
| 1 | Cloudflare Tunnel + Zero Trust SSH | 97/100 |
| 2 | VPN Required + SSH | 95/100 |
| 3 | UFW Allow-Only Specific IP | 92/100 |
| 4 | SSH Key Pair | 85/100 |
| 5 | Fail2Ban | 75/100 |
| 6 | Disable Root SSH | 70/100 |
| 7 | Port Knocking | 75/100 |
| 8 | Change SSH Port | 40/100 |
Can Cloudflare Zero Trust Replace All Other SSH Hardening?
| Feature | Replaced by Cloudflare Tunnel? | Notes |
|---|---|---|
| SSH Key Authentication | Yes (Cloudflare identity replaces key auth) | You can even disable passwords |
| Disable Root Login | Yes (optional) | Still recommended but not critical |
| Change SSH Port | Yes (100% replace) | No need. Tunnel hides access |
| Fail2Ban | Yes | No brute-force possible anymore |
| UFW Restrict IP | Yes (no public access) | SSH port can be totally closed |
| VPN Requirement | Yes | Tunnel replaces VPN perfectly |
| Rotate SSH Keys | Yes | Use identity login instead |
Yes - Cloudflare Tunnel + Zero Trust can replace most traditional SSH hardening by making SSH private, identity-protected, and portless.
Still Recommended Together With Cloudflare
These two are still good even with Zero Trust: Disable Password Login -> use key or Zero Trust only
Disable Root SSH if possible -> reduce risk
Final Answer
Cloudflare Zero Trust can completely replace VPN-based SSH, UFW IP restriction, Fail2Ban, and port-based security. It fully hides SSH from the internet and uses identity authentication. It is currently one of the strongest SSH security approaches.