TCP port monitor

Port reachability and TLS handshake timing for anything non-HTTP.

What it checks

Opens a TCP socket to a host:port and optionally sends a probe string + matches the reply. Use for databases, message queues, mail servers, game servers, and any protocol where HTTP is overkill.

When to use it

• Postgres / Redis / RabbitMQ ports (reachability only — do not expose credentials).
• SSH on non-standard ports.
• Game or VPN servers.
• Custom TCP protocols with a known greeting (e.g. SMTP banner).

Config fields

Fields marked * are required.

Example config

{
  "name": "smtp.example.com banner",
  "type": "tcp",
  "config": {
    "host": "smtp.example.com",
    "port": 25,
    "expect": "220 "
  },
  "interval_sec": 300
}