175 lines
10 KiB
HTML
175 lines
10 KiB
HTML
<!doctype html><html lang=en>
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<meta charset=UTF-8>
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<meta http-equiv=X-UA-Compatible content="IE=edge">
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<meta name=viewport content="width=device-width,initial-scale=1">
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<title>Caileb's Knowledgebase</title>
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<meta name=description content="Caileb's Knowledgebase">
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<link rel=icon href=/images/favi.png type=image/png>
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<link rel=apple-touch-icon href=/images/favi.png>
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<link rel="shortcut icon" href=/images/favi.png>
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<link rel=preload href=/webfonts/Poppins-Regular.woff2 as=font type=font/woff2 crossorigin>
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<link rel=preload href=/webfonts/Poppins-SemiBold.woff2 as=font type=font/woff2 crossorigin>
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<link rel=preload href=/js/u.js as=script>
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<link rel=stylesheet href=/css/u.css>
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<style>:root{--background-color:#1e1e1e;--text-color:#cfcfcf;--heading-color:#ffffff;--code-block-bg:#333;--code-block-border:#4d9cfa;--code-color:#dcdcdc;--link-color:#4d9cfa;--link-hover-color:#4d9cfa;--input-border:#f39c12;--input-focus-border:#e67e22;--collapsible-bg:#2d2d2d;--collapsible-hover-bg:#3a3a3a;--scrollbar-bg:#2d2d2d;--scrollbar-thumb-bg:#4d9cfa;--scrollbar-thumb-hover-bg:#3971a3;--section-divider:#333;--section-accent:#f39c12}body{background-color:var(--background-color);color:var(--text-color);margin:0;line-height:1.4;display:flex;flex-direction:column;align-items:center;padding:20px}.container{max-width:700px;width:100%}h1,h3,h4{color:var(--heading-color);margin-top:0}h2{color:var(--heading-color);margin-top:0;margin-bottom:15px;position:relative;padding-bottom:10px;display:inline-block;cursor:pointer}h2:hover::before{content:"#";position:absolute;left:-1.6rem;color:var(--link-color);opacity:.7}h2::after{content:"";position:absolute;bottom:12px;left:0;width:100%;height:2px;background:var(--section-accent)}.section{margin-bottom:40px;padding-bottom:20px;position:relative}.section::after{content:"";position:absolute;bottom:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--section-divider) 10%,var(--section-divider) 90%,transparent)}.section:last-child::after{display:none}.code-block{background-color:var(--code-block-bg);color:var(--heading-color);padding:10px;border-radius:5px;overflow-x:auto;white-space:nowrap;width:100%;box-sizing:border-box;position:relative;margin-bottom:20px;border:1px solid var(--code-block-border)}.code-block.command::before{content:"$";color:var(--code-block-border);position:absolute;left:10px;top:11px;font-family:Consolas,courier new,monospace}code{font-family:Consolas,courier new,monospace;color:var(--code-color)}code.command{padding-left:15px}a{color:var(--link-color);text-decoration:none}a:hover{text-decoration:underline}.collapsible-label{background-color:var(--collapsible-bg);color:var(--text-color);cursor:pointer;padding:10px;width:100%;border:2px solid var(--input-border);text-align:left;outline:0;font-size:18px;border-radius:5px 5px 0 0;margin-bottom:0;display:flex;justify-content:space-between;align-items:center;max-width:700px;box-sizing:border-box;transition:background-color .3s,border-color .3s;position:relative;z-index:2}.collapsible-label:hover{background-color:var(--collapsible-hover-bg);border-color:var(--input-focus-border)}.collapsible-input{display:none}.content-wrapper{width:100%;position:relative;z-index:1;margin-bottom:20px}.content{max-height:0;overflow:hidden;background-color:var(--collapsible-bg);box-sizing:border-box;width:100%;border:2px solid transparent;border-top:none;transition:max-height .45s ease,padding .45s ease,border-color .45s ease;padding:0 10px}.collapsible-input:checked+.collapsible-label+.content{border-color:var(--input-border);padding:10px}.arrow{transition:transform .3s}.collapsible-input:checked+.collapsible-label .arrow{transform:rotate(180deg)}.step{margin-bottom:20px}.step h4{margin-bottom:10px}</style>
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<script src=/js/u.js async></script>
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<div class=container>
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<div class=section id=fail2ban>
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<h2>Fail2ban</h2>
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<div class=content-wrapper>
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<input type=checkbox id=collapsible-fail2ban class=collapsible-input>
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<label for=collapsible-fail2ban class=collapsible-label>
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Setup Fail2ban
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<span class=arrow>▼</span>
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</label>
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<div class=content>
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<div class=step>
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<h4>Step 1: Install Fail2ban (Debian/Ubuntu)</h4>
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<p>First, install Fail2ban by running:
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<div class="code-block command">
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<code class=command>sudo apt install fail2ban</code>
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</div>
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</div>
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<div class=step>
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<h4>Step 2: Navigate to the Fail2ban Directory</h4>
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<p>Change to the Fail2ban configuration directory:
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<div class="code-block command">
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<code class=command>cd /etc/fail2ban/</code>
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</div>
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</div>
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<div class=step>
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<h4>Step 3: Copy the Example Configuration File</h4>
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<p>Copy the example configuration file as a base for your custom configuration:
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<div class="code-block command">
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<code class=command>sudo cp jail.conf jail.local</code>
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</div>
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</div>
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<div class=step>
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<h4>Step 4: Create a New Filter</h4>
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<p>Navigate to the filter.d directory and create a new filter file:
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<div class="code-block command">
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<code class=command>cd filter.d/</code>
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</div>
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<div class="code-block command">
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<code class=command>sudo nano nginx-4xx.conf</code>
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</div>
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</div>
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<div class=step>
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<h4>Step 5: Define the Filter to Block Repeated 4xx Errors</h4>
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<p>Add the following content to the <code>nginx-4xx.conf</code> file:
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<div class=code-block>
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<code>[Definition]<br>failregex = ^<HOST>.*"(GET|POST|HEAD|CONNECT).*" (404|444|403|400) .*<br>ignoreregex = 127.0.0.1 127.0.0.0/8 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16</code>
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</div>
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</div>
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<div class=step>
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<h4>Step 6: Edit the Jail Configuration to Use the New Filter</h4>
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<p>Go back to the previous directory and edit <code>jail.local</code>:
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<div class="code-block command">
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<code class=command>cd ..</code>
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</div>
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<div class="code-block command">
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<code class=command>sudo nano jail.local</code>
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</div>
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<p>Add the following section:
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<div class=code-block>
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<code>#<br># Repeated 4xx errors (Nginx)<br>#<br>[nginx-4xx]<br>enabled = true<br>port = http,https<br>logpath = /var/log/nginx/access.log<br>maxretry = 4</code>
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</div>
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</div>
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<div class=step>
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<h4>Step 7: Restart Fail2ban for the Changes to Take Effect</h4>
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<p>Restart the Fail2ban service:
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<div class="code-block command">
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<code class=command>sudo systemctl restart fail2ban</code>
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</div>
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</div>
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<div class=step>
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<h4>Step 8: Check the Filter Status</h4>
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<p>Verify the filter is working:
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<div class="code-block command">
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<code class=command>sudo fail2ban-client status nginx-4xx</code>
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</div>
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<h4>OR</h4>
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<p>For a prettified output:
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<div class="code-block command">
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<code class=command>sudo fail2ban-client get nginx-4xx banip | tr ' ' '\n'</code>
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</div>
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</div>
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</div>
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</div>
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</div>
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<div class=section id=pm2>
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<h2>Node PM2</h2>
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<p>Restart
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<pre class="code-block command">
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<code class=command>pm2 restart caileb.com</code>
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</pre>
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</div>
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<div class=section id=ffmpeg>
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<h2>FFmpeg</h2>
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<p>Highest quality AV1
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<div class="code-block command">
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<code class=command>ffmpeg -i input -c:v av1_nvenc -preset p7 -cq 1 -b:v 0 -qmin 1 -qmax 5 -rc-lookahead 250 -spatial-aq 1 -aq-strength 15 -refs 16 -temporal-aq 1 -c:a flac -compression_level 8 highest_quality.mkv</code>
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</div>
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<p>Standard compression
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<div class="code-block command">
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<code class=command>ffmpeg -i input -vf "mpdecimate" -fps_mode vfr -c:v av1_nvenc -preset p7 -cq 30 -b:v 0 -maxrate 18.5M -bufsize 25M -g 240 -keyint_min 24 -rc vbr -c:a libopus -b:a 128k compressed.webm</code>
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</div>
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<p>Extreme compression
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<div class="code-block command">
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<code class=command>ffmpeg -i input -vf "mpdecimate,scale=-1:1080" -fps_mode vfr -c:v av1_nvenc -preset p7 -rc vbr -b:v 6M -maxrate 12M -bufsize 18M -g 300 -keyint_min 34 -c:a libopus -b:a 96k compressed.webm</code>
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</div>
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<p>Rocket.Chat
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<div class="code-block command">
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<code class=command>ffmpeg -i input -vf "mpdecimate,scale=-1:1440" -fps_mode vfr -c:v av1_nvenc -preset p7 -rc vbr -b:v 8M -maxrate 15M -bufsize 22M -g 270 -keyint_min 28 -c:a libopus -b:a 112k rocket_chat.webm</code>
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</div>
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</div>
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<div class=section id=html>
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<h2>Useful HTML Stuffs</h2>
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<p>Make iFrames/Images Lazy Load <a href=https://developer.mozilla.org/docs/Web/Performance/Lazy_loading#images_and_iframes target=_blank rel="noopener noreferrer">MDN</a>
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<p>Replace FitVids or other similar JS libraries with CSS' aspect-ratio <a href=https://developer.mozilla.org/docs/Web/CSS/aspect-ratio target=_blank rel="noopener noreferrer">MDN</a>
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</div>
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<div class=section id=malware-removal>
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<h2>Malware Removal</h2>
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<ol>
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<li>
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<strong><a href=https://www.malwarebytes.com/mwb-download target=_blank rel="noopener noreferrer">Malwarebytes Free</a></strong>
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<p>Easy-to-use tool that quickly detects and removes a broad range of malware.
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<li>
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<strong><a href=https://www.emsisoft.com/home/emergency-kit/ target=_blank rel="noopener noreferrer">Emsisoft Emergency Kit</a></strong>
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<p>Utilizes Bitdefender's engine on top of their own for a strong all-in-one cleanup.
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<li>
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<strong><a href=https://www.sophos.com/free-tools/virus-removal-tool target=_blank rel="noopener noreferrer">Sophos Scan & Clean</a></strong>
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<p>Portable scanner with effective heuristic analysis for detecting malware.
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<li>
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<strong><a href=https://www.kaspersky.com/downloads/free-virus-removal-tool target=_blank rel="noopener noreferrer">Kaspersky Virus Removal Tool</a></strong>
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<p>Efficiently finds and removes stubborn malware threats.
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</ol>
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</div>
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</div>
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<script defer>
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const collapsibleInputs = document.querySelectorAll(".collapsible-input");
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collapsibleInputs.forEach((input) => {
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input.addEventListener("change", function() {
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const content = this.nextElementSibling.nextElementSibling;
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content.style.maxHeight = this.checked ? content.scrollHeight + "px" : "0";
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});
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// Add click event to headers to update URL with section ID
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document.addEventListener('DOMContentLoaded', function() {
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// Get all h2 elements
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const headers = document.querySelectorAll('h2');
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header.addEventListener('click', function() {
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const section = this.closest('.section');
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// Update the URL without reloading the page
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