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Joel Villalba
Remote Web Site Management
Dr. Ganasan
Joel Villalba
Presentors
• Bruce Rong
• Elizabeth Chang
• Teresa Cisneros
• Brian Hirai
• Joel Villalva
Joel Villalba
Introduction
• Remote Website Management - Explained
Joel Villalba
Process of Creating a Website
• Select Domain name• Select an ISP• Where to find applications
Joel Villalba
Selecting Domain Name
• What is a Domain Name– “A companies identifying address on the web”
– A domain name locates an organization or other entity on the Internet
– Need for Domain Name
whatis.comwhatis.com
Joel Villalba
Domain Name (con’td)
• Current Domain Name Extensions– .com
– .org
– .net
– .edu
Joel Villalba
Domain Name: Changes
• New York Law School– .arts– .firm– .info– .nom– .rec– .store– .web
http://www.cmcnyls.edu/public/Papers/NewExten.HTMhttp://www.cmcnyls.edu/public/Papers/NewExten.HTM
Joel Villalba
Registering a Domain Name
• Where– Internic (www.internic.net)
– Via ISP
• Cost– $75 (first two years); $35/year
Joel Villalba
Selecting an ISP
• Top Ten Internet Service Providers– 1) ibm connect– 2) TEK Interactive Group– 3) MCI– 4) Micronet– 5) MindSPRING– 6) GroundZer0– 7) FNet Corporation– 8) TDSNET– 9) Log ON America– 10) WebUSA
pcworld.compcworld.com
Joel Villalba
Where to find applications
• Top Download Sites: PC Magazine.com– davecentral.com
– tucows.com
– download.com
– hotfiles.zdnet.com
Bruce Rong
Communication through SLIP/PPP connection
Bruce Rong
Remote Communication
• PPP (Point to Point Protocol)
• SLIP (Serial Line Internet Protocol)
Bruce Rong
Serial Line Internet Protocol (SLIP)
• SLIP is the earlier technology
• Deficiencies– no addressing– no type identification– no error detection/correction– no compression
Bruce Rong
Point to Point Protocol (PPP)
• PPP is newer and has more capabilities over SLIP
• designed for simple links which transport packets between two peers
• provide full-duple simultaneous bi-directional operation
Bruce Rong
Point-to-Point protocol a common solution
• Encapsulation– provides for multiplexing of different network-layer protocols
simultaneously over the same link
• Link Control Protocol (LCP)– handles varying limits on sizes of packets– detect a looped-back link and other common misconfiguration
errors, and terminate the link
• Network Control Protocols (NCP)– exacerbate many problems with the current family of network
protocols such as assignment and management of IP addresses.
Bruce Rong
PPP Phase Diagram
Dead Establish Authenticate
NetworkTerminate
Up Open
FailFail
Dome
Closing
Success/none
http://www.cis.ohio-state.edu/htbin/rfc/rfc1661.html
Bruce Rong
Remote Communication
Internet
User PC
InternetInternet
User PC
Modem
UNIXMachine
SLIP TerminalServer
User PC
Modem
DIRECTCONNECTION
DIAL UPCONNECTION
SLIP/PPPCONNECTION
SLIP/PPP allows a user with a personal computer, such as a Macintosh or a PC, and a modem to connect to the Internet, without having to first log on to a remote machine.
This capability enables the user to make use of Internet applications and tools such as telnet, file transfer (ftp), electronic mail, and graphical web browsers directly on hisor her personal computer.
Bruce Rong
How does SLIP/PPP connection works
• A user's modem dials up a remote computer at an Internet Service Provider (ISP).
• The SLIP/PPP software requests a SLIP/PPP connection.
• Once the connection is made, the service provider assigns the user's computer an IP address (in the case of a service provider who assigns IP addresses "on the fly").
• The TCP/IP software on the user's computer "takes over" and manages the flow of data between the Internet and the user's computer.
Bruce Rong
Remote Authoring and Management Applications
• Front Page 2000– a big improvement collaboration features
• IIS (Internet Information Server)– brings the power of scalable, component-based
client/server applications to the Web.
Bruce Rong
Internet Information Server(IIS)
• Microsoft Windows NT Server’s built-in Web server.
• Integrated message queuing– provides a reliable send and receive messages
over a network
• Security– using Server Gated Crypto it offer the strongest
(128 bit) encryption for its online transactions
Bruce Rong
Front Page 2000
• Publish Anywhere– build in FTP support
• Check In/Check out– team work made easy, user can reserve a file
only can be edit in FrontPage
• Administer FrontPage-based Web sites remotely using standard HTML
Bruce Rong
Summery
• SLIP and PPP are protocols, or rules, that allow a computer to simulate a direct connection to the Internet. A computer with SLIP or PPP uses a modem to dial in to an Internet Service Provider and establish a SLIP/PPP connection. The SLIP/PPP software and the TCP/IP software on the user's computer work together to manage the connection and oversee the movement of data packets between the Internet and the user's computer.
• A SLIP or PPP connection facilitates the use of Internet applications and tools, such as telnet, file transfer, electronic mail, and graphical web browsers directly on the user's computer, thereby providing the user access to the full spectrum of the Internet's graphical offerings, such as multimedia, sound clips, photographs and animation.
Elizabeth Chang
File Transfer Protocol (FTP)
Elizabeth Chang
What is it?
File transfer protocol (FTP)
• file transfer means to copy files from one
system to another
• protocol is a special
communication language designed for
efficient transfer of files
Elizabeth Chang
FTP Usage
• FTP programs are tools that enable you to upload and download programs, sounds, pictures, and even movies from remote computers.
• Allows you to examine the files on a remote host computer, select the files you desire and transfer them to your computer.
http://www.schoolpositions.com/savvy/ftptut.html
Elizabeth Chang
FTP Usage (continued)
To download/upload files to create or update a Web site.
DeleteRenameCreate directoriesMoveCopy
Elizabeth Chang
What is it based on ?Client server model
- one computer acts as a client, which sends instructions to the other
computer, known as the server
- File transfers can go both ways
- Client initiates the transfer
- Server must be in between the clients
Elizabeth Chang
FTP requires two participants
FTP client program : what we run on our
computers
FTP server : is the program that runs on the
huge mainframe somewhere at a remote site
which contains a lot of files.
Elizabeth Chang
FTP clients (connects to FTP server)
Command-line clients : are generally found on UNIX systems and others that provide “shell” accounts
UNIX “shell” accounts - for the name of the part of UNIX that listens to the commands you type
Graphical clients : provide a windowed interface
http://www.dragonfire.net/ftp.html
Elizabeth Chang
FTP Servers (stores files)
They transmit messages to let you know (or your client program) know what’s going on.
Use to handle the distribution of various files: free programs, product documentation, or data files
FTP servers are independent of the Web and
supply other files other than the ones listed on Web pages
Elizabeth Chang
Transferring Files of Different Types
ASCII (text file)
Mac, Windows, & UNIX have different
conversions for storing text files.
Automatically adjusts the file during the transfer
so that the file is a valid text file when stored on
the receiving end.
Elizabeth Chang
Different types (continued)
Binary (image mode)Sends the file exactly as it isNo changes at allIt is left alone and transferred verbatimCapable of sending any file not just text (graphic
files,audio files, video files, programs and any other kind of file other than plain text)
Levine Young, Margaret. The Complete Reference: Internet Millennium Edition. Worldwide Books
Elizabeth Chang
FTP software
Programs with graphical user interface:
WS_FTP (http://www.ipswitch.com)
CuteFTP (http://www.cuteftp.com)
FTP Explorer (http://www.winsite.com)
Fetch (Mac)
Anonymous FTP
Elizabeth Chang
FTP Software (continued)
Web browsers:Microsoft and Netscape browsers, include basic
FTP client capacity
Command-driven:UNIX and Windows 98 come with a more capable
FTP client program, called Ftp (to use, you must type commands)
Elizabeth Chang
FTP and remote web management
FTP is the simplest way to exchange files between computers on the Internet
Uses the Internet’s TCP/IP protocolsCommonly used to transfer Web page files from
their creator to the computer that acts as their server for everyone on the Internet
Easy and effective means of managing a web sitehttp://whatis.com/ftp.htm
Teresa Cisneros
Telnet
Telecommunications Network Protocol
Teresa Cisneros
When to telnet
• Checking e-mail– from any computer on the Internet– Users can telnet in to their ISP’s server
• When maintaining a Web site– Clean up files and update the site
Teresa Cisneros
Review
Definition of Telnet:
Telnet lets you connect to a remote computer and then use that computer as though you
were sitting at a plain terminal directly connected to the remote host.
Teresa Cisneros
Points to be discussed:
• How to log in to your ISP server via telnet
• How to organize your web site files
• How to rename files, delete unneeded files, fix file permissions and do other tasks related to your web site maintenance
• Different telnet programs available
Teresa Cisneros
Logging in to your ISP Server
1) Connect to the Internet
2) Run a Telnet Program & tell it to connect to the host computer (ISP Server)
3) ...
Teresa Cisneros
Continue…Logging in to your ISP Server
3) A dialog with the host computer appears in the telnet window and you log in to the host computer
4) When you are done making the neccesary changes to your Web site you disconnect from the host computer.
Teresa Cisneros
Once you are logged in to your account you can...
• List your files
• Change the current directory
• Rename, copy, and delete files
• Display file permissions
• Change file permissions
• Display files for changes and updates
Teresa Cisneros
Listing your Files• To see a list of the files in the current
directory, type ls and press ENTER.
Teresa Cisneros
Changing the Current Directory
• To move to a directory, type chdir or cd followed by a space and the name of the directory to move to.
• To move back to your home directory type chdir or cd with no directory name
Teresa Cisneros
Renaming, Copying, and Deleting Files
• To rename a file in the current directory, type mv followed by a space, the current file name, another space and the new file name.
• To see what is in a file, you can use the more command
Teresa Cisneros
Displaying File Permissions• Types of permissions
– Read permission– Write permission– Execute permission
Teresa Cisneros
Some Telnet Programs
Program Web site(more info)
Win 95/98 Telnet
CRT www.vandyke.com
HyperTerminal www.hilgraeve.com/hype.html
NetTerm http://starbase.neosoft.com/~zkrr01
Teresa Cisneros
NetTerm
• Also available from ftp.neosoft.com/~zkrr01
• One of the best telnet clients available on the Net.
• Very user friendly aneasy to use. Small and loads quick.
• Also userful to those looking not to use a lot of disk space.
Teresa Cisneros
References
• Http://tucows.cyberspacehq.com/term95.html
• Levine, Joye and Margaret. More Internet for Dommies. 4th edition, IDG Books Worldwide
• Levine Young, Margaret. The Complete Reference: Internet Millennium Edition. Worldwide Books
• Loshin, Pete. TCP/IP Clearly Explained. 2nd Edition. AP Professional Books.
Brian Hirai
Web Management SecurityWeb Management Security
Secure Socket Layers (SSL)
Brian Hirai
CoverageCoverage
• What is SSL?
• History of SSL
• SSL operations
• Implementing
• Advantages?
Brian Hirai
Secure Socket Layers
• An encryption technology that scrambles a message so that only the intended recipient can unscramble it.
The Handshake protocol is the pioneer of this technology.
Brian Hirai
History
• SSL (Secure Sockets Layer) Handshake Protocol [Hic95] was developed by Netscape Communications Corporation
• Netscape introduced SSL in its popular Navigator browser in 1995.
• Developed to provide security and privacy over the Internet
Brian Hirai
OperationsOperations
• The protocol supports server and client authentication.
• SSL protocol is application independent, allowing protocols like
-HTTP (Hyper Text Transfer Protocol)
-FTP (File Transfer Protocol)
-Telnet
to be layered on top of it transparently.
Brian Hirai
OperationsOperations
• The SSL protocol is able to
-negotiate encryption keys
-authenticate the server
all before data is exchanged by the higher-level application.
• SSL protocol maintains the
-security
-integrity
of the transmission channel by using encryption authentication and message authentication codes.
Brian Hirai
OperationsOperations
Handshake Protocol
Server AuthenticationAuthentication
Optional Client
Teresa Cisneros
Server AuthenticationServer Authentication• Client: Request• Server: Sends its certificate and cipher preferences • Client: generates a master key, which it encrypt
with the server’s public key • Server: recovers master key and authenticates
itself to the client • Client: receives message of authenticity and
master key
Brian Hirai
Optional ClientOptional Client
• Server: Sends a challenge to client
• Client: Authenticates itself to the server by
returning its signature on the server
challenge
• Server: Receives signature and public key
Brian Hirai
ImplementingImplementing
• Enable SSL on your web server
-Only SSL friendly browsers.
-Most modern browsers carry this.
-Determine which kind of browser the
majority of your visitors use.• Digital ID (Digital Certificate)
-a voucher for your identification
-third person party (ex: Verisign)
Brian Hirai
ImplementingImplementing
• Choosing a type:
-40 bit
secure daily transferring (survey)
-128 bit
Higher security (ex: online bank)
• Once you receive your certificate, you are ready to control your web site through a secure line.
Brian Hirai
AdvantagesAdvantages
• Reduced online transaction risks
• Increases customer confidence
• Paving the way for broader public access to online security
Brian Hirai
Management AdvantagesManagement Advantages
Very Simple Concept
• People are much more willing to supply important information when they are sure no one can see it but that intended person.
• People will enter a site they believe will be the safest to browse through without their privacy being invaded.
Brian Hirai
ConclusionConclusion
SSL has become apart of web managing through the daily transmitting of
information. If not for the SSL capabilities one would not be so eager to give out any information. SSL has made web browsing grow among more confident consumers.
Closure