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paulgalow/checkTCP.js

Last active December 31, 2019 08:17
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Revisions

  1. paulgalow revised this gist Dec 31, 2019. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion checkTCP.js
    View file
    Original file line number Diff line number Diff line change
    @@ -1,6 +1,6 @@
    const { createConnection } = require("net");

    function checkTCP(host = "1.1.1.1", port = 443) {
    function checkTCP(host = "1.1.1.1", port = 53) {
    return new Promise((resolve, reject) => {
    const client = createConnection({ host, port }, () => {
    console.log(`TCP connection established on port ${port}`);
  2. paulgalow created this gist Dec 31, 2019.
    24 changes: 24 additions & 0 deletions checkTCP.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,24 @@
    const { createConnection } = require("net");

    function checkTCP(host = "1.1.1.1", port = 443) {
    return new Promise((resolve, reject) => {
    const client = createConnection({ host, port }, () => {
    console.log(`TCP connection established on port ${port}`);
    client.end();
    resolve();
    });

    client.setTimeout(3000);

    client.on("timeout", err => {
    console.error(`TCP connection on port ${port} timed out`);
    client.destroy();
    reject(err);
    });

    client.on("error", err => {
    console.error(`Error trying to connect via TCP on port ${port}`);
    reject(err);
    });
    });
    }