\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{bytebar}
\pdfinfo{
  /Title (common-network-ports.pdf)
  /Creator (Cheatography)
  /Author (bytebar)
  /Subject (Common Network Ports Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{A3A3A3}
\definecolor{LightBackground}{HTML}{F3F3F3}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Common Network Ports Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{bytebar} via \textcolor{DarkBackground}{\uline{cheatography.com/218949/cs/48435/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}bytebar \\
  \uline{cheatography.com/bytebar} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 14th September, 2026.\\
   Updated 14th September, 2026.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.


\begin{tabularx}{17.67cm}{x{3.7994 cm} x{13.4706 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Must-Know Ports}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{20/21}} & TCP — FTP (data/control). "FTP is 21, data rides 20" \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{22}} & TCP — SSH / SCP / SFTP. Secure remote — the secure 2's \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{23}} & TCP — Telnet. {\bf{Insecure}} — never use, know why \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{25}} & TCP — SMTP. Sending email \tn 
% Row Count 7 (+ 1)
% Row 4
\SetRowColor{LightBackground}
{\bf{53}} & TCP/UDP — DNS. UDP for lookups, TCP for zone transfers \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{67/68}} & UDP — DHCP (server/client). "DHCP gives, 67/68 delivers" \tn 
% Row Count 11 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{69}} & UDP — TFTP. Trivial — no auth, PXE boot \tn 
% Row Count 13 (+ 2)
% Row 7
\SetRowColor{white}
{\bf{80}} & TCP — HTTP. Unencrypted web \tn 
% Row Count 14 (+ 1)
% Row 8
\SetRowColor{LightBackground}
{\bf{110}} & TCP — POP3. Downloads email (deletes from server) \tn 
% Row Count 16 (+ 2)
% Row 9
\SetRowColor{white}
{\bf{123}} & UDP — NTP. Time sync \tn 
% Row Count 17 (+ 1)
% Row 10
\SetRowColor{LightBackground}
{\bf{143}} & TCP — IMAP. Email stays on server \tn 
% Row Count 19 (+ 2)
% Row 11
\SetRowColor{white}
{\bf{161/162}} & UDP — SNMP (manager/trap). Monitoring \tn 
% Row Count 21 (+ 2)
% Row 12
\SetRowColor{LightBackground}
{\bf{389}} & TCP/UDP — LDAP. Directory lookups \tn 
% Row Count 23 (+ 2)
% Row 13
\SetRowColor{white}
{\bf{443}} & TCP — HTTPS. Encrypted web \tn 
% Row Count 24 (+ 1)
% Row 14
\SetRowColor{LightBackground}
{\bf{445}} & TCP — SMB/CIFS. Windows file sharing — ransomware loves it \tn 
% Row Count 26 (+ 2)
% Row 15
\SetRowColor{white}
{\bf{636}} & TCP — LDAPS. LDAP over TLS \tn 
% Row Count 27 (+ 1)
% Row 16
\SetRowColor{LightBackground}
{\bf{993}} & TCP — IMAPS. IMAP over TLS \tn 
% Row Count 28 (+ 1)
% Row 17
\SetRowColor{white}
{\bf{995}} & TCP — POP3S. POP3 over TLS \tn 
% Row Count 29 (+ 1)
% Row 18
\SetRowColor{LightBackground}
{\bf{1433}} & TCP — Microsoft SQL. Database default \tn 
% Row Count 31 (+ 2)
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{3.7994 cm} x{13.4706 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Must-Know Ports (cont)}}  \tn
% Row 19
\SetRowColor{LightBackground}
{\bf{3306}} & TCP — MySQL/MariaDB. Database default \tn 
% Row Count 2 (+ 2)
% Row 20
\SetRowColor{white}
{\bf{3389}} & TCP — RDP. Windows remote desktop \tn 
% Row Count 4 (+ 2)
% Row 21
\SetRowColor{LightBackground}
{\bf{5432}} & TCP — PostgreSQL. Database default \tn 
% Row Count 6 (+ 2)
% Row 22
\SetRowColor{white}
{\bf{5900}} & TCP — VNC. Remote screen sharing \tn 
% Row Count 8 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{17.67cm}}{Memorize the bold ones first.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{8.635 cm} x{8.635 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Secure vs Insecure Pairs}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Telnet (23)}} & SSH (22) \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\bf{FTP (21)}} & SFTP/SCP (22) or FTPS \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{HTTP (80)}} & HTTPS (443) \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
{\bf{SNMP v1/v2 (161)}} & SNMP v3 (auth + encryption) \tn 
% Row Count 6 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{POP3 (110) / IMAP (143)}} & POP3S (995) / IMAPS (993) \tn 
% Row Count 8 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{17.67cm}}{Security+ exam favorite: know the secure replacement for each insecure protocol.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{5.0083 cm} x{12.2617 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Email Ports at a Glance}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Send (SMTP)}} & Plain: 25 (587 submission) → Secure: 465 (SMTPS) \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{Receive/read}} & Plain: 110 POP3 / 143 IMAP → Secure: 995 / 993 \tn 
% Row Count 4 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{17.67cm}}{Know the secure port for each email job.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}



\end{document}