openssh-server

Provides the OpenSSH server implementation (sshd) for accepting SSH connections, authenticating users, and providing secure remote shell/SFTP/port forwarding capabilities on a host.

Evaluated Apr 04, 2026 (25d ago)
Homepage ↗ Repo ↗ Infrastructure infrastructure security networking ssh remote-access server
⚙ Agent Friendliness
25
/ 100
Can an agent use this?
🔒 Security
64
/ 100
Is it safe for agents?
⚡ Reliability
40
/ 100
Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality
0
Documentation
40
Error Messages
0
Auth Simplicity
55
Rate Limits
20

🔒 Security

TLS Enforcement
85
Auth Strength
80
Scope Granularity
10
Dep. Hygiene
70
Secret Handling
75

SSH transport is encrypted (not TLS, but provides confidentiality/integrity). Strong security is achievable with key-based auth and modern algorithm configuration; however, there is no fine-grained scope/authorization at the API level (access is primarily via accounts/permissions and SSHD configuration). Actual security posture is configuration- and environment-dependent (keys, ciphers, logging, patching).

⚡ Reliability

Uptime/SLA
0
Version Stability
70
Breaking Changes
60
Error Recovery
30
AF Security Reliability

Best When

You control the host environment (network, firewalling, account management) and can apply standard SSH hardening (keys, permissions, cipher/MAC/KEX policies, logging).

Avoid When

You need an agent-friendly HTTP API, or you cannot enforce secure configuration practices (key-based auth, disabling weak algorithms, least-privilege accounts).

Use Cases

  • Run an SSH server for remote command execution and secure administration
  • Enable SFTP for file transfers
  • Provide SSH tunneling/port forwarding for internal services
  • Set up bastion hosts/jump servers for restricted network access
  • Remote automation by allowing SSH-based workflows

Not For

  • Public internet exposure without strong hardening and monitoring
  • Use as an application-layer API service with REST/GraphQL/SDK expectations
  • Scenarios requiring mTLS-based client authentication without SSH-native mechanisms
  • Environments that disallow network daemons or inbound connections

Interface

REST API
No
GraphQL
No
gRPC
No
MCP Server
No
SDK
No
Webhooks
No

Authentication

Methods: Public key authentication Password authentication (optional, configurable) Keyboard-interactive (configurable) Certificate-based auth (sshd supports SSH certificates, if configured) Host-based authentication (configurable)
OAuth: No Scopes: No

Authentication is performed via SSHD mechanisms (keys/password/interactive/certificates). There is no OAuth-style scoped API authorization model.

Pricing

Free tier: No
Requires CC: No

Typically distributed as open-source software; operational costs come from running the server/host.

Agent Metadata

Pagination
none
Idempotent
False
Retry Guidance
Not documented

Known Gotchas

  • SSH is interactive by nature (prompts, TTY requirements) which can complicate automation if misconfigured.
  • Security depends heavily on sshd_config hardening; a misconfiguration can negate the security properties.
  • Host key verification and key management must be handled carefully in automated agents.
  • Rate limiting is not an API concern; connection limits and Fail2Ban-style tooling may be needed externally.

Alternatives

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Scores are editorial opinions as of 2026-04-04.

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