Micon IP-220E manual Subnetting and Subnet Masks, Subnet Mask Routing and Filtering

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Appendix B: IP Address, Subnet and Gateway

Subnetting and Subnet Masks

Subnetting divides a network address into sub-network addresses to accommodate more than one physical network on a logical network.

For example:

A Class B company has 100 LANs (Local Area Networks) with 100 to 200 nodes on each LAN. To classify the nodes by its LANs on one main network, this company segments the network address into 100 sub-network addresses. If the Class B network address is 150.1.x.x, the address can be segmented further from 150.1.1.x through 150.1.100.x

A subnet mask is a 32-bit value that distinguishes the network ID from the host ID for different sub-networks on the same logical network. Like IP addresses, subnet masks consist of four octets in dotted decimal notation. You can use subnet masks to route and filter the transmission of IP packets among your sub-networks. The value “255” is assigned to octets that belong to the network ID, and the value “0” is assigned to octets that belong to the host ID.

For the example above, if you want all the devices on the sub-networks to receive each other’s IP packets, set the subnet mask to 255.255.0.0. If you want the devices on a single sub-network only to receive IP packets from other devices on its own sub-network, set the subnet mask to 255.255.255.0 for the devices on the sub-network.

Subnet Mask Routing and Filtering

0.0.0.0IP packets are transmitted to all devices.

255.0.0.0IP packets are only transmitted to devices that are IP that’s first octet matches the sender’s IP address’s first octet.

255.255.0.0	IP packets are only transmitted to devices that are IP that’s first two
	octets match the sender’s IP address’s first two octets.
255.255.255.0	IP packets are only transmitted to devices that are IP that’s first three
	octets match the sender’s IP address’s first three octets.

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Contents IGuard Contents Page Introduction FeaturesPackage Contents Light color Condition description IGuard IP-220E HardwareHardware Installation Step Installation ProcedureIGuardware Installing iGuardwareIGuard Utility Using iGuardwareIGuard Setup Wizard Setup WizardIGuard Network Setup IGuard a/DSL Setup Launch iGuard IGuard PPPoE SetupManagerChapter.5 Click either one to Launch iGuard IGuard Web Manager IP ConfigurationIP Configuration Set an IP Address for iGuard Reset Device Password Device PasswordIi. Management Protocol Upgrade FirmwareIGuardware IGuardView Screen Shot IGuardViewDevice Setting IGuardware Camera Setting RED Motion Detection SettingAvifilethree digit numerical sequence Email Notification Setting Server AuthenticationEmail Address Using Snmp to update network ports Snmp SettingCamera Monitor IGuardware IGuardware System ViewHelp Introduction IGuard Web ManagerIGuard Web Manager Web-Camera Selection Information System Status System InformationIi. Network Status IGuard System Status Current ConnectionsIGuard Current Connections Event LogSetting up Camera a Similar with Camera B Basic Settings Camera SettingsIndividual Camera Configuration IP Address NetworkIii. Port Number Ii. DNS Server IPIv. Ethernet Dynamic DNSVi. PPPoE User Account User Name Account SettingsCamera IGuard Permit Hours Configuration Advanced Settings Event NotificationIGuard Event Notification Event Notification Send EmailIGuard Event Selection List IGuard Event Start Up Motion Detection Camera a or Camera B EnableIGuard Motion Detection IGuard Motion Detect Email Notification Camera a or Camera B Begin End hhmm Image RecordingIGuard Email of Image Recorded Mail / FTPIi. Email Settings E-mail Server FTP Settings FTP ServerIGuard test mail function Iii. Sending Test MailSystem Settings Iv. Email Address BookSystem Time Iii. LED Settings Iv. Snmp SettingsIi. System Restart About Snmp settingAbout Ii. Save / Restore Settings Save current ConfigurationAppendix a Router Configuration Ddns Port ForwardingDemilitarized Zone DMZ BEFSR41 Appendix a Router Configuration UDP Type in the camera’s IP addressDescription IGuard Camera Internet Port 9001 to Type TCP Appendix a Router Configuration Dell TrueMobile 2300 Wireless Broadband Router Appendix a Router Configuration Appendix a Router Configuration Appendix a Router Configuration Action Allow always Appendix a Router Configuration TCP Type in the camera’s IP address Appendix a Router Configuration TCP Appendix a Router Configuration Appendix B IP Address, Subnet and Gateway Subnet Mask Routing and Filtering Subnetting and Subnet MasksTerm Definition Appendix C GlossaryQ2. Can I use other USB Camera to connect to iGuard? Appendix D Q&AQ5. What is the effective length of the USB cable? If iGuard is connected to a Router or IP Share then Q13. There is no Port Forwarding Section in my Router Appendix D Glossary