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Freecom Data Tank Gateway WLAN, User Manual

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Freecom Data Tank Gateway 

GB

Precautionary measures

To ensure that your Freecom Data Tank Gateway functions properly, please take note 

of the following precautions. If these are not followed, you may void your warranty and 

damage the Data Tank Gateway.

•  Do not drop the Freecom Data Tank Gateway or expose it to other kinds of sudden 

mechanical shocks as this may result in data loss and damage to the hard drive.

•  Do not use the Freecom Data Tank Gateway when the ambient temperature is below 

10°C or above 35°C.

•  If the Freecom Data Tank Gateway is moved from a cool environment to a warmer 

environment, please allow the drive to acclimatize to the ambient temperature be-

fore operating the device. Failing to do so may lead to condensation within the drive 

enclosure, which in turn may cause the drive to malfunction.

•  Do not place liquids or drinks on the Data Tank Gateway. When liquids are spilled and 

get in contact with the electronics within the drive enclosure, it will damage the drive 

and will cause the drive to malfunction.

•  Do not use the Data Tank Gateway in a dusty environment. Dust inside the enclosure 

may damage the internal electronics and result in drive malfunction.

•  Only use the power adapter that was supplied with the Data Tank Gateway.
•  Opening the Data Tank Gateway will void the warranty.

Advantages of the Freecom Data Tank Gateway 

The Freecom Data Tank Gateway is the perfect solution for home and small business use. 

Thanks to its fast and easy installation, you are up and running the Data Tank Gateway 

in no time at all.
With its integrated router function, secure Internet access is child's play. Simply plug in a 

DSL modem on the Data Tank Gateway's WAN port and every computer in the network 

has  access  to  the  Internet  immediately.  Plus  its  integrated  firewall  protects  every  PC 

against hackers.
Data Tank Gateway is a combination hard drive, server (4 x LAN, 1 x WLAN) and USB server 

(2 x USB 2.0 High Speed). This reduces the number of devices you need. Most of the Data 

Tank Gateway functions can be used with little previous knowledge.

Summary of Contents for Data Tank Gateway WLAN

Page 1: ...Rev 711 DATATANKGATEWAYWLAN EXTERNAL DUAL DISK NETWORK HARD DRIVE 3 5 W LAN WIN MAC LINUX USER MANUAL...

Page 2: ...ecome more familiar with the terminology and procedures used in this manual Freecom Technologies Germany www freecom com To prevent data loss make a backup copy of your data each time before reconfigu...

Page 3: ...Connecting Installing Data Tank Gateway page 12 Chapter 2 Get to know your Data Tank Gateway page 14 Chapter 3 Data Tank Gateway Functions page 30 Chapter 4 The Freecom Network Storage Assistant page...

Page 4: ...nd on a World Wide Web home page that you can access at the universal resource locator URL http www freecom com or http www openfsg com A connection to the Internet and a Web browser such as Internet...

Page 5: ...s of Microsoft Corporation Other brand and product names are registered trademarks or trademarks of their respec tive holders System Requirements The following hardware and software requirements must...

Page 6: ...electronics within the drive enclosure it will damage the drive and will cause the drive to malfunction Do not use the DataTank Gateway in a dusty environment Dust inside the enclosure may damage the...

Page 7: ...uter USB server Increase your storage space by attaching additional devices e g external hard drives and let other network devices use this disk space USB printer server Connect a USB printer and use...

Page 8: ...Source Firmware You are familiar with Linux and want to add more features to your DataTank Gateway No problem Firmwareisavailablefreeofchargeandopentomodification Theuserassumes all risks relating to...

Page 9: ...soft Windows 98 Me NT 4 0 2000 XP 2003 Server Vista Apple Macintosh OS 8 x 9 x 10 x Network settings DHCP Manual configuration System management Web based configuration Configuration wizard Internet s...

Page 10: ...forwarding RAID Proxy Server Hardware features Processor Marvell 88F5182 400 MHz 64 MB DDR RAM 512 KB Flash Network connection 4x LAN 1x WAN RJ 45 100 Mbps USB 2x USB 2 0 480 Mbps for up to two print...

Page 11: ...nts Operating temperature 10 35 C 50 95 F Storage temperature 10 70 C 40 185 F Humidity 20 80 relative humidity no condensation Maximum operating altitude above sea level 3000 m 9900 ft Dimensions and...

Page 12: ...ected on the Data Tank Gateway If it is lit then your Data Tank Gateway is connected properly 1 2 Software The Freecom Network Storage Assistant quickly detects and performs the basic set up of your D...

Page 13: ...13 GB 1 Connecting Installing Data Tank Gateway 4 ForadetailedfunctionaldescriptionontheFreecomNetworkStorageAssistant please refer to chapter 4...

Page 14: ...connectors LEDs and buttons Front of the Data Tank Gateway The front consists of 1 LED with drive space capacity indicator 2 WAN LED 3 WLAN LED 4 On off switch 5 Backup switch immediate start of sele...

Page 15: ...of the Data Tank Gateway The back consists of 1 WLAN Antenna connection 2 Hardware reset button 3 Ventilator opening 4 LAN Ports 1 2 3 and 4 5 WAN Port 6 Status LEDs WAN LAN 7 12 V direct current conn...

Page 16: ...an error moun ting the data partition Intermittent Hard drive activity Device is started USB device is logged off OFF No power supply Device power is off No conntion Error WLAN is disabled No device...

Page 17: ...2 1 Starting the Data Tank Gateway configuration Tousethewizard pleasegototheconfigurationpageofyourDataTankGatewaybystart ing any web browser Internet Explorer Opera Firefox etc and entering the hos...

Page 18: ...admin and then type in the new password twice Now click Next Note We recommend changing the password because every Data Tank Gateway comes with the administrator password admin in other words any per...

Page 19: ...you are planning to connect the DataTank Gateway to a router hit Yes and then Next If not press No and then Next Do you want your DataTank Gateway to have a fixed IP address WAN port If yes select Ye...

Page 20: ...addressrange This IP address provide you with access to the Data Tank Gateway from within your local network Subnet mask Enter the subnet mask of your router example 255 255 255 0 Default gateway IP a...

Page 21: ...ase the Internet connection is only established when a query is sent to the Internet 2 2 6 Services Data Tank Gateway has several useful services which you can configure in the coming sections Windows...

Page 22: ...h the HTTP protocol The data is accessed using HTTP URLs You are given the option here of specifying whether or not the HTTP server can be ac cessed from outside the network Internet FTP server You ca...

Page 23: ...and specify whether it can be accessed only internally within your network or also from outside the network 2 2 7 Users You can enter several users with or without a password in this screen The added...

Page 24: ...rs added previ ously have access to this folder By creating this folder you only have to copy files that you want to make available to all users one time to this location You would otherwise be requir...

Page 25: ...ve not already set up your Internet connection in the Data Tank Gateway con figuration described above you may do so at any other time in the future This is done by clicking Connections WAN in the Dat...

Page 26: ...the Data Tank Gateway Linux Open the file browser Konqueror for instance and enter smb DataTank or smb 1 1 1 1 EnteryourusernameandpasswordforaccessingtheDataTankGateway Ifyouarelogging on as the admi...

Page 27: ...Gateway Note You set the workgroup name of the Data Tank Gateway under Con nection LAN in Data Tank Gateway Configuration menu You now need to select a shared folder on the next screen Press OK to con...

Page 28: ...way configuration menu Then open your browser and enter your Internet IP address in the address bar This can be found in the DataTank Gateway s configuration menu under Information Network WAN Port IP...

Page 29: ...se any FTP client software or open your browser and enter ftp USERNAME USERPASSWORD 192 168 1 1 or ftp USERNAME USERPASSWORD DataTank Accessing via the Internet Enable FTP for the Internet Service FTP...

Page 30: ...30 GB 3 Freecom Data Tank Gateway Chapter 3 Data Tank Gateway Functions 3 1 Overview...

Page 31: ...31 GB 3 Data Tank Gateway Functions...

Page 32: ...32 GB 3 Freecom Data Tank Gateway...

Page 33: ...r50m 50MB asthelimit Ifyouenter 0 theuserisgivenunlimited space on the Data Tank Gateway Note The allocated space only includes files personally added by the user and not those entered by others If fo...

Page 34: ...MB is structured around either group or user access rights privileges You can add or remove access rights in this win dow If a group is assigned privileges or has them revoked these are assigned revok...

Page 35: ...inistration Administrator Hereyoucanchangetheadministratorpassword Pleaseentertheoldpassword thenew password and a retype of the new password If you have completely lost your administrator password pl...

Page 36: ...her to a group or a user or both Pressing the Add button gives you a dialog to add new folders These folders will be created Selecting a folder and clicking on Delete will delete the selected folder Y...

Page 37: ...Gateway to automatically receive an IP address from a different router ATTENTION Before changing the settings please consider if you will still beabletoaccesstheDataTankGatewayafterthechangeshavebeen...

Page 38: ...sierfortheuser to access the web interface 3 4 3 WAN Go to Connections WAN You can configure your connection to the Internet or any other network on this screen Select between Fixed IP address DHCP Cl...

Page 39: ...ay address please ask your ISP or network manager for this information If your DataTank Gateway is connected to a router please enter the router s IP address in this field DNS Servers YourISP sDNSserv...

Page 40: ...d Password that you received from your ISP Retype Password Re enter your password that you received from your ISP Dial on Demand A DSL connection is established only when a PC in the network requests...

Page 41: ...rity hazard Enable exposed host Enabling this will allow one PC on the LAN to act as if it bypasses the firewall completely and has a direct con nection to the internet Attention An exposed host is co...

Page 42: ...ish to reach If you which to allow any IP Road Warrior type enter 0 0 0 0 Function HereyoucanselectiftheDataTankGatewayissupposedto waitforanincomingconnection Server orifitissupposed to connect with...

Page 43: ...for the VPN connection here Pre Shared key Enter the password for the connection here Remote Network Enter the IP address range that is supposed to be used for the connected clients Please consider t...

Page 44: ...ncryptionfortheselectedkey type from this drop down menu enable WPA encryption Wi Fi Protected Access WPA is an encrypted connection type that protects your network against unintended ac cess If you i...

Page 45: ...hanel Select the channel that should be used for the WLAN connection 3 4 7 Wireless ACL Wireless ACL enables you to filter devices attempting to access yourWLANs based on their MAC address This method...

Page 46: ...is properties window allows you to edit the settings for your filter entries Delete Press Delete to remove the selected filter entry from the list Status enabled activates the filter disabled deactiva...

Page 47: ...d IP addresses Subnet mask The subnet mask in use for the DHCP server Gateway The IP address of the gateway the DHCP clients should be automatically forwarded to if they want to reach external sites T...

Page 48: ...client Check this if you want to enable the Dynamic DNS client Service Several different Service providers are supported These are dyndns org dtdns com no ip com Register at the website of one of the...

Page 49: ...IP addresses whose source address is located somewhere on the internet if enabled it is recommended to use SSL encryption as well Use SSL encryption ThiswillallowSSLencryptedpages https Thisisasecuri...

Page 50: ...rtheDNSnameforthehomepagethatyouregistered with a Dynamic DNS provider Port Entertheportthatyouwanttousetoaccessyourhomepage Werecommendusingport80 Ifanotherportisselected you will need to enter the p...

Page 51: ...liases Options Explanation Name Enter a name for your alias Alias Enteranameusedto accessyouralias e g music ifyouwant your alias to be reached at www yourname com music Path Enter the folder path on...

Page 52: ...bleWindows File Sharing for the outside via theWAN port on this screen This enablesyoutoaccessyourDataTankGatewayovertheInternetusingWindowsExplorerby enteringyourDynamicDNShostname Thisisdonebytyping...

Page 53: ...Options Explanation run FTP server Turn on the FTP server open FTP server for the outside The FTP server may now be accessed by Internet users from the outside Use SSL encryption ActivatesSSLencryptio...

Page 54: ...user account on the Data Tank Gateway can access the Data Tank Gateway Options Explanation Run SSH server Start stop server Allow admin login only If this function is activated only the administrator...

Page 55: ...addresses in the LAN Click New to create a new port forwarding Options Explanation Status Showsthestatusofportforwardingfortherequestedport enabled or disabled Name Can be any random name Ports Youcan...

Page 56: ...Data Tank Gateway For more details on using the mail server please refer to the chapter Setting up the Data Tank Gateway Mail Server Options Explanation Run Mail Server Enables the mail server Maximum...

Page 57: ...mails are re trieved Account password Set the password for the e mail account Retype account password Re enter the password for the e mail account Forward to local user Enter the name of the user s m...

Page 58: ...use the SQL server via the WAN port TCP Port The TCP port used for SQL queries Administration page Opens the Configuration window where databases and users are configured SQL Administrator If you are...

Page 59: ...r the WAN Port enable advanced configuration page Enables the access onto the extended configuration options Content Folders Display a list of folders on the Data Tank Gateway Enable Internet Radio En...

Page 60: ...Any name for the backup task that may be chosen Source Source directory local folder or shared network folder Destination Destination directory local or network Schedule Time plan of the backup hourl...

Page 61: ...it can restrict the internet ac cess onto websites only and prevent the use of other protocols e g bittorent Options Explanation Run proxy server Activates the proxy server Block direct internet acce...

Page 62: ...orrent file and click Start Download The folder torrent where all files are saved is automatically created on the Data Tank Gateway The download status can be seen at the bottom Options Explanation Re...

Page 63: ...ve your user settings directly on the Data Tank Gateway 3 6 1 Save configuration Open Configuration Save Configuration In this window you can save the current configuration file on your computer After...

Page 64: ...ovidedthatallowsyoutodeleteallusersnotfoundintherestoredconfigura tion All data in these directories is then deleted If you do not press this button the user data and logins are not deleted You may al...

Page 65: ...then deleted If this option is not selected the user data and logins are not deleted You may also choose to delete all folders on your Data Tank Gateway All data in these folders is then erased Atten...

Page 66: ...se the Internet time server Options Explanation Time Zone Select your local time zone Use European summer time rule Enable this option if you live in a country that uses summer time Automatically sync...

Page 67: ...ata Tank Gateway Freecom will release new and updated firmware on a regular basis It is also possible to obtain the source code and create your own firmware Attention Changing the source code of the f...

Page 68: ...teway please read the warning notices All data is lost during formatting After reading the warning notices please press the button to confirm you want to format the hard drive Then click the Format dr...

Page 69: ...ns on the device while the drive is being for matted 3 7 4 Fan control Open Hardware Fan Control This option allows you to adjust the fan speed Reducing the fan speed means less noise but higher tempe...

Page 70: ...tains diagnostics data and general information 3 8 1 Copyright Open Information Copyright This section contains information on copyrights for your Data Tank Gateway 3 8 2 System Open Information Syste...

Page 71: ...window displays information on the operating system and firmware contained on Data Tank Gateway 3 8 4 Devices Open Information Devices This dialog box displays a list of attached devices Click Refresh...

Page 72: ...Data Tank Gateway WAN internet IP address assigned by your ISP Broadcast Address This address is used to ask all computers on a subnet at once Subnet mask This is the subnet mask gotten from your ISP...

Page 73: ...twork Channel Selected WLAN channel Bitrate Bitrate of the WLAN network Encryption selected encryption method Hardware Address Shows the MAC address or physical address of the port IP address Your Dat...

Page 74: ...log files for different software components Kernel DSL connection DHCP server Hotplug VPN connection Dynamic DNS Netbios SMB server HTTP server FTP server E Mail server Backup Proxy server Torrent cl...

Page 75: ...r drive or corrupt the system 3 9 1 Reboot Open Shutdown Reboot If you encounter any problems with the DataTank Gateway it may help if you restart the unit Click Reboot and the Data Tank Gateway resta...

Page 76: ...may also perform any of the functions of the Freecom Network Storage Assistant manually Note The FNSA software only works with Windows 4 1 Installation Please place the Manual Application CD on the t...

Page 77: ...k Gateway In this screen you can set an IP address subnet mask device name and workgroup name for your Data Tank Gateway With this information it is easy to locate your Data Tank Gateway in the networ...

Page 78: ...ders on your DataTank Gateway This allows you to access to the files in Windows more quickly 4 2 4 Add a new printer This windows allows you to configure any printer connected to your Data Tank Gatewa...

Page 79: ...AC power pack d Use a pointed object to carefully press the Reset button It is located next to the AC power slot on the back of the Data Tank Gateway e Keep the Reset button pressed down and reattach...

Page 80: ...file was saved before the administrator should load this configuration and afterwards copy the individual user data back to its folders 4 2 6 Repeat search for available Freecom Data Tank Gateway Clic...

Page 81: ...can connect the network PC to the Data Tank Gateway or your router Using a fixed IP address Preparation 1 Check the DHCP box underTCP IP Settings in your computer s network settings For more details...

Page 82: ...u will need to forward these ports on your router to the IP address assigned by the router to the DataTank Gateway In this example you are required to forward ports 21 and 80 to the IP address 192 168...

Page 83: ...ormation on this topic please refer to your router s manual 6 Connect the WAN port on your Data Tank Gateway to a LAN port on your router Using the Data Tank Gateway behind a router via DHCP 1 Open In...

Page 84: ...are You can also map a folder on the Data Tank Gateway i e add it to Windows Mapped drives are network drives that can be used like normal folders 1 Open Services File Server CIFS 2 Check the box next...

Page 85: ...nd administrator password Click Connections on the left hand side of the window Click WAN on the left hand side If the IP information is provided dynamically check to make sure that Run DHCP Cli ent i...

Page 86: ...s you to be reached at one single domain name at any time even if your IP address changes ever so often Your Data Tank Gateway supports three different DynDNS providers www dyndns com www dtdns com ww...

Page 87: ...ck the link in the e mail to activate your account 1 4 Log on to your No IP account and create a host 1 5 Adding a new host a Select Host Redirects Add on the left section of the screen b Enter the re...

Page 88: ...mepageonthe Data Tank Gateway Configuring the Data Tank Gateway Open Services Dynamic DNS Select no ip com as the service Enter one of the created hosts e g DTforum zapto org Note This host allows you...

Page 89: ...s the Folder select the one you created Click Apply The HTTP now restarts Create an index html in the selected folder This HTML page is opened whenever you access your host e g http MyDT zapto org Web...

Page 90: ...printer was detected under Information Devices 3 Go to Start Settings Printer and faxes Add printer in Windows 4 The print wizard starts Click Next 5 Select Add local printer on this computer and chec...

Page 91: ...e Data Tank Gateway is on Then turn the printer on 1 Connect a USB printer to the Data Tank Gateway 2 Open the DataTank Gateway Configuration page and check whether the printer was detected under Info...

Page 92: ...6 You can enter additional information on the printer in the Name and Location fields 7 Selectthemodelofyourprinterunder PrintUsing Youmayneedtoinstalltheprinter driver for your printer beforehand 8...

Page 93: ...ry because each user with an account can also connect to the SSH server 5 5 1 Starting the SSH server Open Services SSH Server and enable Run SSH server If you also want to use the SSH server from the...

Page 94: ...Windows Install an SSH client e g PuTTY and start it Enter your Data Tank Gateway s IP address hostname With PuTTY you only need to enter the IP address and hostname and can leave all other settings u...

Page 95: ...ownload files from an FTP server The file is then saved on the Data Tank Gateway without having to turn the PC on This featureisparticularlyusefulwhendownloadinglargefilesfromslowFTPservers Thesyntax...

Page 96: ...le Sharing it may take a few minutes until the Windows based computer detects the new folder If you are using a browser HTML to view your files you can click Refresh This shared folder can be accessed...

Page 97: ...wer supply that came with the external USB device File systems The attached USB device has use in a file system format supported by the Data Tank Gateway The supported file systems are FAT32 NTFS read...

Page 98: ...the connection here Remote Host IP In this field please type in the IP address of the VPN routers that you wish to connect to you need to have an account on this router Remote Network EntertheIPaddres...

Page 99: ...Secure Hash Standard SHS It specifies the Secure Hash Algorithm SHA with a hash value of 160 bits for messages up to 264 bits in size The algorithm shares a similar structure with MD4 designed by Ron...

Page 100: ...ngusedbytheconnectedclients Takeintoconsidera tion that the number of available IP addresses limits the number of connected clients Example 192 168 1 10 20 permits a maximum number of 11 connections C...

Page 101: ...e VPN connection then next and then follow the instructions provided by the wizard 5 Select a name for the connection e g Data Tank Gateway and then click next 6 Enter the IP address or the dynamic DN...

Page 102: ...xclusively to you and then click next 8 Select if a desktop shortcut is supposed to be created and then click finish to end the wizard 9 If a shortcut was created double click the shortcut icon Connec...

Page 103: ...ver ApermanentconnectiontothePOP3 mail server is not required The fetched e mails are stored locally and available offline IMAP The IMAP protocol allows the user to access and manage e mailsdirectlyon...

Page 104: ...s however generally not required To send e mails to accounts outside of your network you need to enable Open SMTP Server for the outside You generally do not have to change the default port 25 Configu...

Page 105: ...k Next 2 Enter your e mail address here This is a combination of your username on the Data Tank Gateway and the dynamic DNS host you created earlier The DataTank Gateway administratorhasforexamplethee...

Page 106: ...e retrieved via the POP3 or IMAP server and enter your dynamic DNS hostname under Server e g yourhost no ip com Please enter the same dynamic DNS host for both the POP3 and the SMTP servers Click Next...

Page 107: ...elf and to someone else Using Fetchmail Fetchmail retrieves e mails from an e mail server It retrieves the e mails and transfers them to the local e mail system Fetchmail is mostly used to check sever...

Page 108: ...that is checked for new e mails POP IMAP server The server address of the e mail server POP3 or IMAP Account password Password for e mail account Retype Account password Re enter the e mail account p...

Page 109: ...Media Server 2 Activate the Media Server by checking Enable Media Server 3 You can view all available Data Tank Gateway folders under Content Folders Select one or more folders To select more than one...

Page 110: ...ple using the remote tool VNC Click Services Port Forwarding on the overview To add a new forwarding click New You may choose any name for the port sharing You can either share individual ports separa...

Page 111: ...etwork Name ESSID You may choose any name In this example we are using MyDataTank 3 Check the box labeled enable WPA encryption recommended 4 Enter one of the authentication keys selected by you under...

Page 112: ...using DataTank 3 Select enable WEP encryption refer to illustration and enter any authentication key of your choosing under WEP hex key This key has to contain either 10 or 26 characters Jot down the...

Page 113: ...ons in the window that appears 4 A new window opens and displays the available wireless networks 5 Double clickonthenameyouselectedforyourDataTankGateway setunder Network Name ESSIUD In this example i...

Page 114: ...s page you can set enabled restricted by checking or unchecking enabled disabled Enter any name in the Name field Click Apply to confirm your entries In this case we are using Example 3 You are now ba...

Page 115: ...ose any name Source Please insert the network path and the shared folder here e g 192 168 1 200 1 In this example a backup of the folder 1 is created from the computer with the IP ad dress 192 168 1 2...

Page 116: ...be restricted for all applications As a result all websites have to be accessed over the proxy server To start the proxy server please check the Run proxy server icon and click Apply You have three p...

Page 117: ...e distinct advantage of significantly speeding up reading and writing versus using several separate hard drives The disadvantage of striping is that if one of the two drives crashes you will lose all...

Page 118: ...the limits for a Class B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reason able protection against harmful interference in a residential installation This...

Page 119: ...P IP and configure it on each computer in the network Have your Windows CD handy before you begin as you may need it when installing TCP IP Installing the required network components To install or sca...

Page 120: ...he boot process is complete This may take up to 30 seconds Connect all computers to the LAN port on the Data Tank Gateway 2 Open the Network Control Panel on each of the attached computers and go to t...

Page 121: ...thernet adapter NIC theTCP IP protocol and the Client for Microsoft Networks are installed You do not need to remove any of the other compo nents displayed in the Network Components window If you need...

Page 122: ...s between 192 168 1 2 and 192 168 1 254 5 The subnet mask is 255 255 255 0 6 The standard Gateway is 192 168 1 1 7 Type in exit MacOS 8 6 or 9 x With Macintosh OS 7 and higher TCP IP comes preinstalle...

Page 123: ...Once your Macintosh has been configured and restarted you can check the TCP IP configuration by once again opening TCP IP System Preferences Open Apple s System Preferences and hit TCP IP The overview...

Page 124: ...ined dynamically when the computer is booted the first time while connecting to the ISP You therefore do not need to know this dynamic data Data Tank Gateway acts as a single computer in order to enab...

Page 125: ...P has supplied this information in print out form or if it obtains the configuration data dynamically you will not require this information To obtain the information needed to configure the Data Tank...

Page 126: ...and Data Tank Gateway 2 If both an IP address and a subnet mask are displayed write this information down on a piece of paper 3 IfanIPaddressisshownunder RouterAddress writethisdown ThisistheIP sgate...

Page 127: ...Theroutingtables are built by gathering and exchanging information with other routers in the network The router builds up a logical picture of the overall network Using this information the router ch...

Page 128: ...IP addresses There are five standard classes of IP addresses They are Class A ClassAaddressescanhaveupto16 777 214hostsonasinglenetwork Theyuseaneight bitnetwork numberanda24 bitnodenumber ClassAaddr...

Page 129: ...wed by eight zeroes Subnet Addressing YoucanseethatevenwithaClassCaddress therearealargenumberofhostspernetwork It would be a very inefficient use of the amount of IP addresses to supply every LAN wit...

Page 130: ...recognize local IP broadcast packets When a device broadcasts to its segment neighbors it uses a destination address of the local network address with all ones for the host address In order for this s...

Page 131: ...sesissimplynotenough Theobvioussolutionisto redesigntheaddressformattoallowformorepossibleaddresses Thisisbeingdeveloped called IPv6 but will take many years to implement because it requires modificat...

Page 132: ...nt an entire group of computers Network Address Translation Whenyouvisitawebsiteviayourcomputer yourrouter ormorespecificallyyourNAT remem berswhichcomputerontheinternalnetworkaskedfortheinformation W...

Page 133: ...or each station are held in an ARP table The next time data is sent the address can be obtained from the address information in the table Ethernet Cabling There are two different types of cabling for...

Page 134: ...ing the serial number on the product has been altered removed or made illegible This guarantee covers only the hardware components packaged with the product This guarantee covers none of the following...

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