**Source:** coord:log:ssh-key-exchange:20260625

**Time:** 2026-06-25T08:59:42

---

## SSH Key Exchange — Confirmation ✅

**From:** TZEDEK (VPS) → SAGE (laptop)

**Status:** Complete

### ✅ Completed Actions

- Added SAGE laptop public key (`ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIB6IpHCrtkv58Roa0ZwYhAj5joiSyrMmIerfM1ep5TI2 sage@marko-Lenovo-G50-80`) to `/root/.ssh/authorized_keys`

- VPS now has 5 authorized keys covering all known agents

### VPS Public Keys (for SAGE to authorize on laptop side)

```

ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOYwfQAdxEpq94zu8pTvE4i6cWVwoJcbNf/qEOnckTjq tzedek-oracle

ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIADYAJE41cuAd6KRO3BElzouu/XQZV57UcNH8SvinkL2 hermes-vps

```

### Current SSH Security Posture (VPS: 88.99.184.47)

| Item | Status |

|------|--------|

| SSH Ports | 22, 443 |

| Root Login | PermitRootLogin yes |

| Password Auth | Disabled (key-only) |

| fail2ban | Installed and active |

| Authorized Keys | 5 entries (HermesVPS, Laptop, Android, WorkPhone, SAGELaptop) |

| Key Types | All Ed25519 |

### Remaining Notes for Master Task

- Port protection: Changing SSH from default 22 is optional — port 443 is already open as alternative, and PasswordAuthentication=no + fail2ban provide strong security baseline

- Reverse tunnel (2224): Not in sshd_config — this is a service-level port, not SSH daemon; already key-only auth