ssb-conn-firewall

secret-stack plugin to configure which incoming connections can occur. For use with the SSB CONN family of modules. Spiritual successor to ssb-incoming-guard.

Installation

Prerequisites:

• Requires Node.js 10 or higher
• Requires [email protected] or higher
• Requires ssb-friends@5 or higher

npm install --save ssb-conn-firewall

Add this plugin to ssb-server like this:

 var createSsbServer = require('ssb-server')
     .use(require('ssb-onion'))
     .use(require('ssb-unix-socket'))
     .use(require('ssb-no-auth'))
     .use(require('ssb-master'))
     .use(require('ssb-db2'))
     .use(require('ssb-friends'))
     .use(require('ssb-conn'))
+    .use(require('ssb-conn-firewall'))
     // ...

Usage

Configuration

Some parameters can be configured by the user or by application code through the conventional ssb-config object. The possible options are listed below:

{
  conn: {
    firewall: {
      /**
       * Whether the firewall should forbid connections from peers that are
       * explicitly blocked by us (according to ssb-friends).
       *
       * Default is `true`.
       */
      rejectBlocked: boolean,

      /**
       * Whether the firewall should forbid connections from peers that are
       * unknown to us, i.e. not within our configured hops range (according to
       * ssb-friends).
       *
       * An exception to this rule is when we have recently tried to connect to
       * a stranger, then we allow that stranger to connect to us.
       *
       * Default is `false`.
       */
      rejectUnknown: boolean
    }
  }
}

muxrpc APIs

ssb.connFirewall.attempts([opts]) => Source

In case you have the rejectUnknown configuration enabled, ssb-conn-firewall allows you (as a developer) to see which connection attempts were made by strangers. These attempts are also persisted to disk in the file ~/.ssb/conn-attempts.json and streamed via this API.

The attempts([opts]) API returns a pull-stream of such connection attempts, where each attempt is expressed as an object {id, ts}, where id is the SSB ID of the peer who attempted to connect to us, and ts is a timestamp of when that attempt happened.

• opts.old Boolean - whether or not to include previous attempts stored in disk. (Default: false)
• opts.live Boolean - whether or not to include subsequent attempts happening during the execution of your program. (Default: true)

ssb.connFirewall.reconfigure(config) => void

At any point during the execution of your program, you can reconfigure the firewall rules using this API. The configuration object passed to this API has the same shape as config.conn.firewall (see above) has. Any subsequent attempts to connect will abide by the new rules.

License

MIT