Webinar topic: Automatic Backup via FTP Part 1 Presenter: Achmad Mardiansyah & Een Fahlepi In this webinar series, How Automatic Backup via FTP works Please share your feedback or webinar ideas here: http://bit.ly/glcfeedback Check our schedule for future events: https://www.glcnetworks.com/en/schedule/ Follow our social media for updates: Facebook, Instagram, YouTube Channel, and telegram also discord Recording available on Youtube https://youtu.be/4gsbidPonps

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Automatic
backup via FTP
GLC Webinar,
1 Feb 2022
Achmad Mardiansyah
Een Pahlefi
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Automatic backup

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Agenda
● Introduction
● Review prerequisite knowledge
● FTP protocol
● Mikrotik FTP support
● Live practice
● Q & A
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introduction
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What is GLC?
● Garda Lintas Cakrawala (www.glcnetworks.com)
● Based in Bandung, Indonesia
● Areas: Training, IT Consulting
● Certified partner for: Mikrotik, Ubiquity, Linux foundation
● Product: GLC radius manager
● Regular event
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Trainer Introduction
● Name: Achmad Mardiansyah
● Base: bandung, Indonesia
● Linux user since 1999, mikrotik user since 2007, UBNT
2011
● Mikrotik Certified Trainer
(MTCNA/RE/WE/UME/INE/TCE/IPv6)
● Mikrotik/Linux Certified Consultant
● Website contributor: achmadjournal.com, mikrotik.tips,
asysadmin.tips
● More info:
http://au.linkedin.com/in/achmadmardiansyah
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Past experience
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● 2020-2022 (Congo DRC, PNG, Malaysia): network
support, radius/billing integration
● 2019, Congo (DRC): build a wireless ISP from
ground-up
● 2018, Malaysia: network revamp, develop billing
solution and integration, setup dynamic routing
● 2017, Libya (north africa): remote wireless migration
for a new Wireless ISP
● 2016, United Kingdom: workshop for wireless ISP,
migrating a bridged to routed network

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About GLC webinar?
● First webinar: january 1, 2010 (title:
tahun baru bersama solaris - new year
with solaris OS)
● As a sharing event with various topics:
linux, networking, wireless, database,
programming, etc
● Regular schedule
● Irregular schedule: as needed
● Checking schedule:
http://www.glcnetworks.com/schedule
● You are invited to be a presenter
○ No need to be an expert
○ This is a forum for sharing: knowledge,
experiences, information
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Please introduce yourself
● Your name
● Your company/university?
● Your networking experience?
● Your mikrotik experience?
● Your expectation from this course?
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Prerequisite
● This presentation requires some prerequisite knowledge
● We assume you already know:
○ Computer networking
○ Mikrotik administration
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Review prerequisite knowledge
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7 OSI layer & protocol
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● OSI layer Is a conceptual model from ISO
(International Standard Organization) for project
OSI (Open System Interconnection)
● When you send a message with a courier, you
need to add more info to get your message arrived
at the destination (This process is called
encapsulation)
● What is protocol
○ Is a set of rules for communication
○ Available on each layer
● Communication consist of series encapsulation
○ SDU: service data unit (before PDU)
○ PDU: protocol data unit (after header is added)

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Layered model (TCP/IP vs ISO) and encapsulation
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/ datagram

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Layer 4 header (which one is TCP?)
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Layer 3 header (which one is IPv4?)
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Ethernet header (which is the MTU?)
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802.11 header
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Did you notice?
● There is a big overhead on encapsulation process
● More encapsulation means less payload?
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File Transfer Protocol
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File Transfer Protocol (FTP)
● RFC756 (1980) -> rfc959 (1985)
● Protocol for file transfer
● Plain text
● Client server architecture
● port : TCP:21
● Mode:
○ ACTIVE
○ PASSIVE
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FTP Communication and data transfer
● ACTIVE MODE
○ Server actively connect to client address using port 20
● PASSIVE MODE
○ Only use port 21
○ Recommended if the server/client behind NAT
○ Recommended if firewall blocks incoming connect to clients
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FTP data types
● ASCII (TYPE A): Used for text
● Image (TYPE I, commonly called Binary mode)
● EBCDIC (TYPE E): Used for plain text between hosts using the EBCDIC
character set.
● Local (TYPE L n): Designed to support file transfer between machines which
do not use 8-bit bytes, e.g. 36-bit systems such as DEC PDP-10s.
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File structure
● F or FILE structure (stream-oriented). Files are viewed as an arbitrary
sequence of bytes, characters or words.
● R or RECORD structure (record-oriented). Files are viewed as divided into
records, which may be fixed or variable length.
● P or PAGE structure (page-oriented). Files are divided into pages, which may
either contain data or metadata; each page may also have a header giving
various attributes.
●
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Data transfer modes
● Stream mode (MODE S): Data is sent as a continuous stream, relieving FTP
from doing any processing. Rather, all processing is left up to TCP. No
End-of-file indicator is needed, unless the data is divided into records.
● Block mode (MODE B): Designed primarily for transferring record-oriented
files (STRU R), although can also be used to transfer stream-oriented (STRU
F) text files. FTP puts each record (or line) of data into several blocks (block
header, byte count, and data field) and then passes it on to TCP.[9]
● Compressed mode (MODE C): Extends MODE B with data compression
using run-length encoding.
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Authentication
● Anonymous
○ Aka. public FTP service
○ Everyone can access
○ Server can configure if anonymous FTP can write data or not
● User authentication
○ Requires username and password
Notes:
● No encryption
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Security improvements
● FTPS
○ FTP service with encryption (public key and private key)
○ Port: 990 / 21
○ Can be implicit or explicit encryption
● SFTP
○ FTP over SSH service
○ Port 22 (SSH port)
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FTP stack
● Server:
○ Pureftp
○ Wsftp
○ Etc
● Client:
○ Cli
■ Ftp, mc
○ GUI
■ Filezilla
■ Winscp
■ etc
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FTP commands
● get/mget
● put/mput
● open/close
● cd/lcd
● mkdir/rmdir
● ls
● mode
● passive
● bye
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220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
220-You are user number 1 of 50 allowed.
220-Local time is now 06:07. Server port: 21.
220-This is a private system - No anonymous login
220 You will be disconnected after 15 minutes of inactivity.
Name (localhost:root): ftpuser1
331 User ftpuser1 OK. Password required
Password:
230 OK. Current directory is /home/ftpuser1
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> ?
Commands may be abbreviated. Commands are:
! dir mdelete qc site
$ disconnect mdir sendport size
account exit mget put status
append form mkdir pwd struct
ascii get mls quit system
bell glob mode quote sunique
binary hash modtime recv tenex
bye help mput reget tick
case idle newer rstatus trace
cd image nmap rhelp type
cdup ipany nlist rename user
chmod ipv4 ntrans reset umask
close ipv6 open restart verbose
cr lcd prompt rmdir ?
delete ls passive runique
debug macdef proxy send
ftp>

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Mikrotik FTP support
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Mikrotik FTP support
● As an FTP server
○ Ip services
● As FTP client
○ Via CLI (fetch)
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LIVE practice
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preparation
● SSH client
● SSH parameters
○ SSH address
○ SSH port
○ SSH username
○ SSH password
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Q & A
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Interested? Just come to our training...
● Topics are arranged in systematic and logical way
● You will learn from experienced teacher
● Not only learn the materials, but also sharing experiences, best-practices, and
networking
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End of slides
● Thank you for your attention
● Please submit your feedback: http://bit.ly/glcfeedback
● Find our further event on our website : https://www.glcnetworks.com/en/
● Like our facebook page: https://www.facebook.com/glcnetworks
● Slide: https://www.slideshare.net/glcnetworks/
● Discord (bahasa indonesia): (https://discord.gg/6MZ3KUHHBX)
● Recording (youtube): https://www.youtube.com/c/GLCNetworks
● Stay tune with our schedule
● Any questions?
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