automatically end the writable side when the readable side ends. See

[`net.createServer()`][] and the [`'end'`][] event for details. **Default:**

`false`.

* `blockList` {net.BlockList} `blockList` can be used for disabling outbound

access to specific IP addresses, IP ranges, or IP subnets.

* `fd` {number} If specified, wrap around an existing socket with

the given file descriptor, otherwise a new socket will be created.

* `keepAlive` {boolean} If set to `true`, it enables keep-alive functionality on

the socket immediately after the connection is established, similarly on what

is done in [`socket.setKeepAlive()`][]. **Default:** `false`.

* `keepAliveInitialDelay` {number} If set to a positive number, it sets the

initial delay before the first keepalive probe is sent on an idle socket. **Default:** `0`.

* `noDelay` {boolean} If set to `true`, it disables the use of Nagle's algorithm

immediately after the socket is established. **Default:** `false`.

* `onread` {Object} If specified, incoming data is stored in a single `buffer`

and passed to the supplied `callback` when data arrives on the socket.

This will cause the streaming functionality to not provide any data.

`0` indicates that both IPv4 and IPv6 addresses are allowed. **Default:** `0`.

* `hints` {number} Optional [`dns.lookup()` hints][].

* `host` {string} Host the socket should connect to. **Default:** `'localhost'`.

* `keepAlive` {boolean} If set to `true`, it enables keep-alive functionality on

the socket immediately after the connection is established, similarly on what

is done in [`socket.setKeepAlive()`][]. **Default:** `false`.

* `keepAliveInitialDelay` {number} If set to a positive number, it sets the

initial delay before the first keepalive probe is sent on an idle socket.

**Default:** `0`.

* `localAddress` {string} Local address the socket should connect from.

* `localPort` {number} Local port the socket should connect from.

* `lookup` {Function} Custom lookup function. **Default:** [`dns.lookup()`][].

* `noDelay` {boolean} If set to `true`, it disables the use of Nagle's algorithm

immediately after the socket is established. **Default:** `false`.

* `port` {number} Required. Port the socket should connect to.

* `blockList` {net.BlockList} `blockList` can be used for disabling outbound

access to specific IP addresses, IP ranges, or IP subnets.

For [IPC][] connections, available `options` are: