No TLS, Custom WebSocket Port

Same as the simplest setup, but the WebSocket port is moved off the default 8080.

TLS off (ws://)

No credentials

WS port 8777

nats-server.4-ok-ws-port.conf

1. Setup (nats-server.conf)

nats-server.conf

# Must expose the same websocket port in the docker run command
# (nats-server-start.sh) and in this config file, otherwise the browser
# viewer will fail with "Unable to connect to NATS over WebSocket at
# ws://<host>:<port>".

listen: 0.0.0.0:4222
http_port: 8222

# WebSocket transport — required for the browser to connect at all.
websocket {
  port: 8777
  no_tls: true
}

# JetStream — required for KV buckets and Streams.
jetstream {}

Docker port mapping (nats-server-start.sh)

docker run -d --restart unless-stopped \
  -p 4222:4222 -p 8222:8222 -p 8777:8777 \
  ...

One-time nats-cli setup

# nats-cli always talks to the core NATS port (4222), never the
# WebSocket port — the custom port above only matters to the browser viewer.
nats context add tutorial-custom-port \
  --server="nats://10.135.32.227:4222" \
  --select

In Connection section, enter:

NATS server host: 10.135.32.227
WS port: 8777
TLS (wss): off
Username: (leave blank)
Password: (leave blank)

2. Creation of subject / KV bucket / stream

Subject

In the Subscriptions form: Type: Subject · Target: orders.>

No setup required — just add the subscription above.

KV Bucket

In the Subscriptions form: Type: KV Bucket · Target: my-bucket

nats kv add my-bucket

JetStream Stream

In the Subscriptions form: Type: JetStream Stream · Target: ORDERS · Filter: orders.created (optional)

nats stream add ORDERS --subjects "orders.>" --storage file \
  --retention limits --max-msgs=-1 --max-bytes=-1 --max-age=0 --defaults

System Service

Not available

This configuration has no `accounts`/`system_account`, so $SYS.> system events are never published. See Tutorial 2 (No TLS, With Credentials) to enable system monitoring.

3. Message generation

Subject

nats pub orders.created '{"id": 1, "total": 42.5}'

KV Bucket

nats kv put my-bucket hello world

JetStream Stream

nats pub orders.created '{"id": 1}'

Open Spy NATS