{"id":9533,"date":"2025-11-05T23:12:25","date_gmt":"2025-11-05T14:12:25","guid":{"rendered":"https:\/\/sinbidays.com\/%f0%9f%93%a1-what-is-dns-hacking-intro-day-1-my-first-cybersecurity-practice\/"},"modified":"2026-03-09T15:35:29","modified_gmt":"2026-03-09T06:35:29","slug":"%f0%9f%93%a1-what-is-dns-hacking-intro-day-1-my-first-cybersecurity-practice","status":"publish","type":"post","link":"https:\/\/sinbidays.com\/en\/%f0%9f%93%a1-what-is-dns-hacking-intro-day-1-my-first-cybersecurity-practice\/","title":{"rendered":"\ud83d\udce1 What is DNS? Hacking Intro Day 1: My First Cybersecurity Practice"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/What-is-DNS.jpg\" alt=\"A clean, illustrative photo explaining what a domain is.\" class=\"wp-image-4402\" style=\"width:602px;height:auto\" srcset=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/What-is-DNS.jpg 800w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/What-is-DNS-300x300.jpg 300w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/What-is-DNS-150x150.jpg 150w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/What-is-DNS-768x768.jpg 768w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/What-is-DNS-12x12.jpg 12w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">&#8220;<strong>Could DNS really be this emotional&#8230;?<\/strong>&#8220;<br\/>(Shinbi Security Day 1, first step into emotion + practical skills.)<\/figcaption><\/figure>\n\n<p><br\/><\/p>\n\n<script async=\"\" src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-1714963467738367\" crossorigin=\"anonymous\"><\/script><!-- click-breeze --><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1714963467738367\" data-ad-slot=\"8109743087\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n<p><\/p>\n\n<h2 class=\"wp-block-heading\">Hacking? No, it&#8217;s the start of an emotional routine. <\/h2>\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"800\" height=\"327\" src=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/Hacking-Movie-1024x418.jpg\" alt=\"Four cards with human silhouettes are placed, exuding a mysterious atmosphere. \" class=\"wp-image-4403\" style=\"width:594px;height:auto\" srcset=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/Hacking-Movie.jpg 800w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/Hacking-Movie-300x122.jpg 300w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/Hacking-Movie-768x314.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n<p>Today, the word &#8216;hacking&#8217; suddenly popped into my head.<br\/>I&#8217;m not sure why. I was meditating,<br\/>and suddenly the phrase <strong>&#8220;cybersecurity expert&#8221;<\/strong> crossed my mind.<br\/>Actually, that was my childhood dream: a white hat hacker.  <\/p>\n\n<p>In movies, hackers shake up big corporations, uncover hidden truths, and bring justice, right?<br\/>Of course, you shouldn&#8217;t do that in real life, haha.<br\/>Anyway, to me, it felt like a <strong>&#8220;job that could change the world.&#8221;<\/strong><\/p>\n\n<p>From elementary school, when my dad bought me my first computer, sitting in front of it was my favorite thing.<br\/>I first encountered the internet, explored websites, watched Flash animations, and then played games&#8230;<br\/>In college, I even made Tetris with C language and Breakout with MFC.<\/p>\n\n<p>But as time passed, that dream faded,<br\/>and as I adjusted my university, career, and life to reality,<br\/>cybersecurity felt like a distant, far-off story.<\/p>\n\n<p>But you know what?<br\/>For the past few years, as I&#8217;ve consistently practiced <strong>affirmations and meditation<\/strong>,<br\/>my life has surprisingly started flowing naturally<br\/>in the direction I&#8217;d always wished for.<\/p>\n\n<p><strong>Coding, logo design, blog management, monetization, content creation&#8230;<\/strong><br\/>Everything was flowing under the name &#8216;Shinbiverse,&#8217;<br\/>and now, the keyword &#8216;security&#8217; has naturally fit right into that flow! <\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">What is DNS?<\/h2>\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"800\" height=\"731\" src=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/DNS-What-This-1024x936.jpg\" alt=\"This is the DNS completion screen on the TryHackMe site, showing a YouTube tutorial video. \" class=\"wp-image-4401\" srcset=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/DNS-What-This.jpg 800w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/DNS-What-This-300x274.jpg 300w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/DNS-What-This-768x702.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/tryhackme.com\/dashboard\" target=\"_blank\" rel=\"noreferrer noopener\">TryHackMe: (https:\/\/tryhackme.com\/dashboard<\/a>)<\/figcaption><\/figure>\n\n<p>The first concept I covered in practice was &#8220;DNS.&#8221;<br\/>It would be really hard if we had to remember internet addresses as numbers, right?<br\/>So, DNS is the system that manages how computers actually understand<br\/>the <strong>domain names<\/strong> we use.<\/p>\n\n<p>DNS (Domain Name System) is a system that converts complex numerical addresses (IPs)<br\/>into easy-to-remember textual addresses (domains).<\/p>\n\n<p>For example,<br\/>instead of remembering an IP like <code>104.26.10.229<\/code>,<br\/>you can easily access it with a domain like <code>tryhackme.com<\/code>.<\/p>\n\n<h2 class=\"wp-block-heading\">\ud83e\udde9 Components of a Domain<\/h2>\n\n<style>\n  details {\n    padding: 12px 16px;\n    margin-bottom: 12px;\n    border: 1px solid #ddd;\n    border-radius: 8px;\n    background-color: #fefefe;\n    font-size: 16px;\n    line-height: 1.7;\n  }\n\n  summary {\n    font-weight: 600;\n    cursor: pointer;\n    font-size: 17px;\n    padding: 4px 0;\n  }\n\n  summary::marker {\n    color: #6c63ff;\n  }\n\n  code {\n    background-color: #eee;\n    padding: 2px 6px;\n    border-radius: 4px;\n    font-size: 95%;\n  }\n<\/style>\n\n<details>\n  <summary>1\ufe0f\u20e3 TLD (Top-Level Domain)<\/summary>\n This is the <strong>very end part<\/strong> of a domain. \n Examples: <code>.com<\/code>, <code>.org<\/code>, <code>.kr<\/code>, etc.<br\/><br\/>  &#8211; <code>.com<\/code>: Company\/Commercial \n &#8211; <code>.org<\/code>: Non-profit organization \n &#8211; <code>.kr<\/code>: Korean site<br\/><br\/>  \u2714\ufe0f In practice, <code>.com<\/code>, <code>.co.kr<\/code>, and <code>.net<\/code> are the most commonly used.\n<\/details>\n\n<details>\n  <summary>2\ufe0f\u20e3 Second-Level Domain (SLD)<\/summary>\n This is the <strong>core name part<\/strong> of a domain. \n Example: In <code>sinbidays.com<\/code>, <code>sinbidays<\/code> is the SLD.<br\/><br\/> \u2714\ufe0f This is the most important name when purchasing a domain, as it reflects your brand or site identity.\n<\/details>\n\n<details>\n  <summary>3\ufe0f\u20e3 Subdomain<\/summary>\n This is the <strong>part added to the front<\/strong> of a domain, used to differentiate services.<br\/> Example: In <code>admin.sinbidays.com<\/code>, <code>admin<\/code> is the subdomain.<br\/><br\/>  \u2714\ufe0f In reality, it&#8217;s used for various service distinctions like <code>blog.<\/code>, <code>shop.<\/code>, <code>mail.<\/code>, etc.\n<\/details>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">\ud83e\uddfe Commonly Used DNS Record Types in Practice<\/h2>\n\n<style>\n  details {\n    padding: 12px 16px;\n    margin-bottom: 12px;\n    border: 1px solid #ddd;\n    border-radius: 8px;\n    background-color: #fafafa;\n    font-size: 16px;\n    line-height: 1.7;\n  }\n\n  summary {\n    font-weight: 600;\n    cursor: pointer;\n    font-size: 17px;\n    padding: 4px 0;\n  }\n\n  summary::marker {\n    color: #6c63ff;\n  }\n\n  code {\n    background-color: #eee;\n    padding: 2px 6px;\n    border-radius: 4px;\n    font-size: 95%;\n  }\n<\/style>\n\n<details>\n  <summary>\u2714\ufe0f A Record<\/summary>\n Connects a domain to an IPv4 address.<br\/> Example: <code>sinbidays.com \u2192 104.26.10.229<\/code><br\/> This is the most basic setting for website connections.\n<\/details>\n\n<details>\n  <summary>\u2714\ufe0f AAAA Record<\/summary>\n This record is used to connect an IPv6 address.<br\/> (The address length is longer than before.)<br\/> Example: <code>2606:4700:20::681a:be5<\/code><br\/> Used for future-proofing, but A records are more common currently.\n<\/details>\n\n<details>\n  <summary>\u2714\ufe0f CNAME Record<\/summary>\n Used to connect a domain to another domain.<br\/> Example: <code>shop.sinbidays.com \u2192 shops.shopify.com<\/code><br\/> Often used for connecting external services or configuring subdomains.\n<\/details>\n\n<details>\n  <summary>\u2714\ufe0f MX Record<\/summary>\n Specifies the mail receiving server.<br\/> Example: <code>sinbidays.com \u2192 mail.google.com<\/code><br\/> Essential for integrating email systems like Google Workspace or Naver Works.\n<\/details>\n\n<details>\n  <summary>\u2714\ufe0f TXT Record<\/summary>\n A record that allows text-based information to be entered.<br\/> Example: Google Search Console verification, email security (SPF, DKIM) settings, etc.<br\/> Used for domain ownership verification or spam prevention.\n<\/details>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">\ud83e\udde9 Summary<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>DNS is the <strong>&#8216;internet phonebook&#8217;<\/strong> that links website domains and IP addresses.<\/li>\n\n\n\n<li>Domains are divided into <strong>TLD, SLD, and Subdomain<\/strong>,<br\/>and understanding each component is fundamental for practical work.<\/li>\n\n\n\n<li>A, CNAME, MX, and TXT records are frequently used when setting up domains.<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">DNS Request Flow Summary<\/h3>\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"621\" height=\"588\" src=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/DNS-Going.jpg\" alt=\"An image illustrating the DNS flow. It briefly outlines a 4-step process. \" class=\"wp-image-4397\" srcset=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/DNS-Going.jpg 621w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/DNS-Going-300x284.jpg 300w\" sizes=\"(max-width: 621px) 100vw, 621px\" \/><\/figure>\n\n<ol class=\"wp-block-list\">\n<li>My computer checks its cache.<\/li>\n\n\n\n<li>If not in cache, a request is sent to the ISP&#8217;s recursive DNS server.<\/li>\n\n\n\n<li>If still not found, it proceeds to the Root DNS server \u2192 TLD server \u2192 authoritative name server.<\/li>\n\n\n\n<li>The final response returns and is delivered back to my computer.<\/li>\n<\/ol>\n\n<p>\u2192 This is how we connect to the actual server just by entering a domain!<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">Practice Review: My First TryHackMe Challenge!<\/h2>\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"800\" height=\"575\" src=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/TryHackMe-Study-1024x736.png\" alt=\"The screen shows problem-solving during a TryHackMe completion course. All answers are correct. \" class=\"wp-image-4399\" srcset=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/TryHackMe-Study.png 800w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/TryHackMe-Study-300x216.png 300w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/TryHackMe-Study-768x552.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"800\" height=\"341\" src=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/Linux-game-1024x437.png\" alt=\"This is the Linux CMD (command prompt) screen.\" class=\"wp-image-4398\" srcset=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/Linux-game.png 800w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/Linux-game-300x128.png 300w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/Linux-game-768x328.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n<p><\/p>\n\n<!-- flow-point -->\n<ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1714963467738367\" data-ad-slot=\"5283844161\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n<p><\/p>\n\n<p>Today, I tried my first practice on <strong><a href=\"https:\/\/tryhackme.com\/dashboard\" target=\"_blank\" rel=\"noreferrer noopener\">TryHackMe<\/a><\/strong>.<br\/>A black window, similar to a Linux prompt, opened up,<br\/>and I had to solve problems by typing commands directly!<\/p>\n\n<p>At first, I was a bit nervous. It had been a while since I&#8217;d seen Linux commands&#8230;<br\/>But once I started, it was so much fun! <\/p>\n\n<p>Every time I solved a problem, a &#8220;Success!&#8221; message popped up like in a game,<br\/>and the thrill was incredible, seriously \u314e\u314e\u314e<\/p>\n\n<p><br\/><\/p>\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"800\" height=\"663\" src=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/DNS-Security-Success-1024x849.jpg\" alt=\"A certificate of completion for DNS details. It shows difficulty and achievements like a game. \" class=\"wp-image-4396\" srcset=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/DNS-Security-Success.jpg 800w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/DNS-Security-Success-300x249.jpg 300w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/DNS-Security-Success-768x637.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n<figure class=\"wp-block-pullquote\"><blockquote><p>&#8220;Ah, I did it&#8230;!&#8221;<\/p><\/blockquote><\/figure>\n\n<p>It didn&#8217;t feel like studying; it was genuinely <strong>fun solving a task<\/strong>.<br\/>You know that feeling when you clear a mission in a rhythm game or strategy game as a kid?<br\/>I felt that today. In real life, for real! <\/p>\n\n<p><\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">Concluding Today&#8217;s Record with Emotion<\/h2>\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"800\" height=\"590\" src=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/TryHackMe-SNS-1024x755.jpg\" alt=\"The screen prompts to share on social media after successfully completing the DNS course.\" class=\"wp-image-4400\" srcset=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/TryHackMe-SNS.jpg 800w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/TryHackMe-SNS-300x221.jpg 300w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/11\/TryHackMe-SNS-768x566.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n<p>Perhaps because I&#8217;m combining media detox with a meditation routine these days,<br\/>I feel joy and immersion even in small daily things.<\/p>\n\n<p>Before, I would have just passed by,<br\/>but now, even learning one thing about DNS, I find meaning in it.<\/p>\n\n<p>I&#8217;m no longer just learning security.<\/p>\n\n<p>Embracing the Shinbiverse philosophy of <strong>&#8220;connecting emotion and technology,&#8221;<\/strong><br\/>I&#8217;m creating my own rhythm and routine.<\/p>\n\n<p>And I hope this record,<br\/>someday reaches someone<br\/>and makes them think, &#8220;I can do it too.&#8221;<\/p>\n\n<p><\/p>\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-shinbidays wp-block-embed-shinbidays\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"nOpNPmSM54\"><a href=\"https:\/\/sinbidays.com\/en\/shinbiverse-my-brand-my-universe\/\">SHINBIVERSE \u2013 My Brand, My Universe<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;SHINBIVERSE \u2013 My Brand, My Universe&#8221; &#8212; \uc2e0\ube44\ub370\uc774\uc988 (ShinbiDays)\" src=\"https:\/\/sinbidays.com\/en\/shinbiverse-my-brand-my-universe\/embed\/#?secret=MIfsk3u02t#?secret=nOpNPmSM54\" data-secret=\"nOpNPmSM54\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<p>I&#8217;ll take another step forward tomorrow. \u2728<\/p>\n\n<p><em>Shinbi Security Day 1, Seojun&#8217;s Diary.<\/em><\/p>\n\n<!-- value-touch -->\n<ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1714963467738367\" data-ad-slot=\"1544334733\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Hacking? No, it&#8217;s the start of an emotional routine. Today, the word &#8216;hacking&#8217; suddenly popped into my head.I&#8217;m not sure why. I was meditating,and suddenly the phrase &#8220;cybersecurity expert&#8221; crossed my mind.Actually, that was my childhood dream: a white hat hacker. In movies, hackers shake up big corporations, uncover hidden truths, and bring justice, right?Of course, you shouldn&#8217;t do that in real life, haha.Anyway, to me, it felt like&#8230;<\/p>\n","protected":false},"author":1,"featured_media":9536,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[5540],"tags":[5553,5542,5555,5544,5552,5550,5554,5548,5546],"class_list":["post-9533","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity","tag-cybersecurity","tag-dns","tag-dns-records","tag-emotional-hacker","tag-introduction-to-hacking","tag-security-practice-review","tag-shinbi-security","tag-tryhackme","tag-web-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The Start of My DNS and Cybersecurity Emotional Routine | TryHackMe Recommendation<\/title>\n<meta name=\"description\" content=\"My childhood dream: a cybersecurity expert. This is Seojun&#039;s Day 1 diary, a record of my renewed &#039;hacking sensibility&#039; through meditation and routine. It neatly summarizes what DNS is and its essential components for practical use, along with my review of learning cybersecurity relatively easily with TryHackMe.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sinbidays.com\/en\/%f0%9f%93%a1-what-is-dns-hacking-intro-day-1-my-first-cybersecurity-practice\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Start of My DNS and Cybersecurity Emotional Routine | TryHackMe Recommendation\" \/>\n<meta property=\"og:description\" content=\"My childhood dream: a cybersecurity expert. This is Seojun&#039;s Day 1 diary, a record of my renewed &#039;hacking sensibility&#039; through meditation and routine. 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