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JDK on Amazon, Security, CRM Setup, and other

22 Jan 2019 - friendbear

Java Tips

Security

  • DNS Hosts file

https://github.com/drduh/macOS-Security-and-Privacy-Guide#hosts-file

$ curl https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts | sudo tee -a /etc/hosts

$ wc -l /etc/hosts
65580

$ egrep -ve "^#|^255.255.255|^0.0.0.0|^127.0.0.1|^0 " /etc/hosts | sort | uniq | sort
::1 localhost
fe80::1%lo0 localhost
[should not return any other IP addresses]

DNSCrypt-proxy

https://github.com/drduh/macOS-Security-and-Privacy-Guide#dnscrypt

$ brew info dnsproxy
$ brew info dnscrypt-proxy
dnscrypt-proxy: stable 2.0.19 (bottled), HEAD
Secure communications between a client and a DNS resolver
https://github.com/jedisct1/dnscrypt-proxy
/usr/local/Cellar/dnscrypt-proxy/2.0.19 (12 files, 11.8MB) *
  Poured from bottle on 2019-01-15 at 09:27:12
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/dnscrypt-proxy.rb
==> Dependencies
Build: go ✔
==> Options
--HEAD
	Install HEAD version
==> Caveats
After starting dnscrypt-proxy, you will need to point your
local DNS server to 127.0.0.1. You can do this by going to
System Preferences > "Network" and clicking the "Advanced..."
button for your interface. You will see a "DNS" tab where you
can click "+" and enter 127.0.0.1 in the "DNS Servers" section.

By default, dnscrypt-proxy runs on localhost (127.0.0.1), port 53,
balancing traffic across a set of resolvers. If you would like to
change these settings, you will have to edit the configuration file:
  /usr/local/etc/dnscrypt-proxy.toml

To check that dnscrypt-proxy is working correctly, open Terminal and enter the
following command. Replace en1 with whatever network interface you're using:

  sudo tcpdump -i en1 -vvv 'port 443'

You should see a line in the result that looks like this:

 resolver.dnscrypt.info

To have launchd start dnscrypt-proxy now and restart at startup:
  sudo brew services start dnscrypt-proxy

$ sudo brew services restart dnscrypt-proxy

$ sudo lsof -Pni UDP:5355
COMMAND     PID   USER   FD   TYPE            DEVICE SIZE/OFF NODE NAME
dnscrypt- 16387 nobody    7u  IPv4 0xc0d1987dc8b08a3      0t0  UDP 127.0.0.1:5355
dnscrypt- 16387 nobody   10u  IPv6 0xc0d1987dc8b2bfb      0t0  UDP [::1]:5355
dnscrypt- 16387 nobody   12u  IPv4 0xc0d1987dc8b08a3      0t0  UDP 127.0.0.1:5355
dnscrypt- 16387 nobody   14u  IPv6 0xc0d1987dc8b2bfb      0t0  UDP [::1]:5355

Dnsmasq setup faild

Try again

https://github.com/drduh/macOS-Security-and-Privacy-Guide#dnsmasq

Check Firewall

 /usr/libexec/ApplicationFirewall/socketfilterfw --listapps
ALF: total number of apps = 7

1 :  /Library/Java/JavaVirtualMachines/amazon-corretto-8.jdk/Contents/Home/bin/java
 	 ( Allow incoming connections )

$ scutil --dns | head
DNS configuration

resolver #1
  nameserver[0] : 127.0.0.1
  flags    : Request A records, Request AAAA records
  reach    : 0x00030002 (Reachable,Local Address,Directly Reachable Address)

resolver #2
  domain   : local
  options  : mdns
 k22  m6  ~  Posts  master  $ 
 networksetup -getdnsservers "Wi-Fi"
127.0.0.1
 k22  m6  ~  Posts  master  $ 
 dig +dnssec icann.org

; <<>> DiG 9.10.6 <<>> +dnssec icann.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62152
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 4096
;; QUESTION SECTION:
;icann.org.			IN	A

;; ANSWER SECTION:
icann.org.		599	IN	A	192.0.43.7
icann.org.		599	IN	RRSIG	A 7 2 600 20190203113621 20190113072110 37170 icann.org. PLr/I2F3vtEl7ehskLkj3oBtFkzdeqV7gbmD7Jz5E+4YVdaMiMynQpKu F7hf5EIlUcGbqWIuPyvPX/u7EAET9FiAox5oDNvm+0CU8RIaCTyhkly3 Z6CbOrqjwEe2uQ8wAIfdanhgMqfQ7YYGz0k/jsEAoZQoahCYGcMHDXWl GfQ=

;; Query time: 209 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jan 22 15:18:41 JST 2019
;; MSG SIZE  rcvd: 241

$ dig www.dnssec-failed.org

; <<>> DiG 9.10.6 <<>> www.dnssec-failed.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 64166
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1252
;; QUESTION SECTION:
;www.dnssec-failed.org.		IN	A

;; Query time: 389 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jan 22 15:19:39 JST 2019
;; MSG SIZE  rcvd: 50

$ dig +dnssec icann.org

; <<>> DiG 9.10.6 <<>> +dnssec icann.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8197
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 1252
;; QUESTION SECTION:
;icann.org.			IN	A

;; ANSWER SECTION:
icann.org.		599	IN	A	192.0.43.7
icann.org.		599	IN	RRSIG	A 7 2 600 20190203113621 20190113072110 37170 icann.org. PLr/I2F3vtEl7ehskLkj3oBtFkzdeqV7gbmD7Jz5E+4YVdaMiMynQpKu F7hf5EIlUcGbqWIuPyvPX/u7EAET9FiAox5oDNvm+0CU8RIaCTyhkly3 Z6CbOrqjwEe2uQ8wAIfdanhgMqfQ7YYGz0k/jsEAoZQoahCYGcMHDXWl GfQ=

;; Query time: 256 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jan 22 17:53:00 JST 2019
;; MSG SIZE  rcvd: 241

Proxy configuration(Wifi)

cmd

$ sudo networksetup -setwebproxy "Wi-Fi" 127.0.0.1 8118

$ sudo networksetup -setsecurewebproxy "Wi-Fi" 127.0.0.1 8118

$ scutil --proxy
<dictionary> {
  ExceptionsList : <array> {
    0 : *.local
    1 : 169.254/16
  }
  FTPPassive : 1
  HTTPEnable : 1
  HTTPPort : 8118
  HTTPProxy : 127.0.0.1
  HTTPSEnable : 1
  HTTPSPort : 8118
  HTTPSProxy : 127.0.0.1
  SOCKSEnable : 0
}

Install Wireshark

$ tshark -Y "http.request or http.response" -Tfields   -e ip.dst   -e http.request.full_uri   -e http.request.method   -e http.response.code   -e http.response.phrase   -Eseparator=/s

Capturing on 'Wi-Fi'
239.255.255.250 http://239.255.255.250:1900* M-SEARCH
10.0.1.171   200 OK
10.0.1.171   200 OK
10.0.1.171   200 OK
10.0.1.171   200 OK
10.0.1.35 http://10.0.1.35:8200/rootDesc.xml GET
10.0.1.147 http://10.0.1.147:2869/upnphost/udhisapi.dll?content=uuid:6300ae58-f771-4946-bf51-617e8c5f8385 GET
10.0.1.168 http://10.0.1.168:60000/upnp/dev/976f8f9f-c68d-ec53-0000-00007b3772f0/desc GET
10.0.1.171   200 OK
10.0.1.171   200 OK

Setup CRM

  • HubSpot

kumasora programming lesson

  • .NET.CORE
  • VSCode
    • dotnet build
    • dotnet run
  • dotnet command reference 
    コマンド     関数
dotnet build     .NET Core アプリケーションをビルドします。
dotnet build-server     ビルドによって起動されたサーバーとやり取りします。
dotnet clean     クリーン ビルド出力です。
dotnet help     コマンドのより詳細なドキュメントをオンラインで表示します。
dotnet migrate     有効な Preview 2 プロジェクトを .NET Core SDK 1.0 プロジェクトに移行します。
dotnet msbuild     MSBuild コマンド ラインへのアクセスを提供します。
dotnet new     指定されたテンプレートの C# または F# プロジェクトを初期化します。
dotnet pack     コードの NuGet パッケージを作成します。
dotnet publish     .NET Framework に依存するアプリケーションまたは自己完結型アプリケーションを発行します。
dotnet restore     指定されたアプリケーションの依存関係を復元します。
dotnet run     ソースからアプリケーションを実行します。
dotnet sln     ソリューション ファイルのプロジェクトを追加、削除、一覧表示するオプション。
dotnet store     ランタイム パッケージ ストアにアセンブリを格納します。
dotnet test     テスト ランナーを使用してテストを実行します。

Install Software

  • brew cask install macdown
  • Coda2
  • Transmit

Try Scala

  • RockScalaAdvanced
    • JVM Thread Communication
    • Producer-Consumer, Level2
    • Producer-Consumer, Level3
Snippet 

#!/usr/bin/env amm
@main
def ThreadCommunication(args: String*) = {
  /*
    the producer-consumer problem

    producer -> [ ? ] -> consumer
  */
  class SimpleContainer {
    private var value: Int = 0

    def isEmpty: Boolean = value == 0
    def set(newValue: Int) = value = newValue
    def get = {
      val result = value
      value = 0
      result
    }
  }

  lazy val naive = {
    def naiveProdCons(): Unit = {
      val container = new SimpleContainer

      val consumer = new Thread(() => {
        println("[consumer] waiting...")
        while (container.isEmpty) {
          println("[consumer] actively waiting...")
        }
        println("[consumer] I have consumed " + container.get)
      })

      val producer = new Thread(() => {
        println("[producer] computing...")
        Thread.sleep(500)
        val value = 42
        println("[producer] I have produced, after long work, the value" + value)
        container.set(value) // Change isEmpty => True
      })

      consumer.start
      producer.start
    }
    naiveProdCons()
  }

  // wait and notify
  lazy val smart = {
    /*
      Synchronized
      val someObject = "hello'
      someObject.synchronized {
        // code
      }


      wait() and notify()

      // thread 1
      val someObject = "hello"
      someObject.synchronized {
        // code part 1
        someObject.wait()
        // code part 2
      }

      // thread 2
      someObject.synchronized {
        // code
        someObject.notify()
      }

     */
    def smartProdCons() = {
      val container = new SimpleContainer
      val consumer = new Thread(() => {
        println("[consumer] waiting...")
        container.synchronized{
          container.wait()
        }

        // container must have some value
        println("[consumer] I have consumed " + container.get)
      })

      val producer = new Thread(() => {
        println("[producer] Hard at work...")
        Thread.sleep(2000)
        val value = 42

        container.synchronized {
          println("[producer] I'm producing " + value)
          container.set(value)
          container.notify()
        }
      })
      consumer.start
      producer.start
    }
    smartProdCons()
  }



#!/usr/bin/env amm
@main
def ProducerConsumerLevel3(args: String*) = {
 /*
    Prod-cons, level 3

      producer1 -> [ ? ? ? ] =-> consumer1
      producer2 ----^     ^----- consumer2
   */

  class Consumer(id: Int, buffer: mutable.Queue[Int]) extends Thread {
    override def run(): Unit = {
      val random = new Random()

      while(true) {
        buffer.synchronized({
          /*
            producer produces value. two Cons are waiting
            notifies ONE consumer,notifies on buffer
            notifies the other consumer

           */
          /*
          [consumer 1] buffer empty, waiting ...
          [consumer 3] buffer empty, waiting ...
          [consumer 2] buffer empty, waiting ...
          [producer 1] producing 0
          [consumer 1] consumed 0
          [producer 3] producing 0
          Exception in thread "Thread-2" [producer 2] producing 0
          [consumer 2] consumed 0
          java.util.NoSuchElementException: queue empty
            at scala.collection.mutable.Queue.dequeue(Queue.scala:67)
            at concurrency.ProducerConsumerLevel3$Consumer.run(ProducerConsumerLevel3.scala:39)
          [producer 2] producing 1
          why ?
            🔴 This is Point not if use while 🔴
           */
          while (buffer.isEmpty) {
            println(s"[consumer $id] buffer empty, waiting ...")
            buffer.wait()
          }

          // there must be at least ONE value in the buffer
          val x = buffer.dequeue() // OOps.!
          println(s"[consumer $id] consumed " + x)

          // hey producer, there's empty space available, are you lazy?
          buffer.notify()
        })

        Thread.sleep(random.nextInt(500))
      }
    }
  }

  class Producer(id: Int, buffer: mutable.Queue[Int], capacity: Int) extends Thread {
    override def run(): Unit = {
      val random = new Random()
      var i = 0
      while (true) {
        buffer.synchronized {
          while (buffer.size == capacity) {
            println(s"[producer $id] buffer is full, waiting...")
            buffer.wait()
          }
          // there must be at least ONE EMPTY SPACE in the buffer
          println(s"[producer $id] producing " + i)
          buffer.enqueue(i)

          //todo hey consumer, new food for you!
          buffer.notify()
          i += 1
        }
        Thread.sleep(random.nextInt(500))
      }
    }
  }

  def multiProdCons(nConsumers: Int, nProducers: Int) = {
    val buffer: mutable.Queue[Int] = new mutable.Queue[Int]
    val capacity = 3

    (1 to nConsumers).foreach(i => new Consumer(i, buffer).start())
    (1 to nProducers).foreach(i => new Producer(i, buffer, capacity).start())
  }

  multiProdCons(3, 3)
}
kumasora(osu! storyboard) <https://masuqat.net/programming/csharp/OpenTKindex.php> 

// kumasora programming lesson
using OpenTK;
using OpenTK.Graphics;
using StorybrewCommon.Mapset;
using StorybrewCommon.Scripting;
using StorybrewCommon.Storyboarding;
using StorybrewCommon.Storyboarding.Util;
using StorybrewCommon.Subtitles;
using StorybrewCommon.Util;
using System;
using System.Collections.Generic;
using System.Linq;

namespace StorybrewScripts
{
    public class Black : StoryboardObjectGenerator
    {
        public override void Generate()
        {
            var layer = GetLayer("TEST");
            var BG = layer.CreateSprite("back.png", OsbOrigin.Centre);

            BG.Scale(0, 10000, 2, 2);
            BG.Fade(0, 2000, 0, 10);
            BG.Fade(8000, 10000, 10, 0);
        }
    }
}

Reference

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