ADDER CATx User Manual

Also see for AdderView CATx AVX4016: User guide

Contents

ADDER CATx User Manual Manual pdf 77 page image

 76Net MaskAlso often called the ‘subnet-mask’, this value is used alongside the IP addressto help define a smaller collection (or subnet) of devices on a network. In thisway a distinction is made between locally connected devices and ones that arereachable elsewhere, such as on the wider Internet. This process helps to reduceoverall traffic on the network and hence speed up connections in general.GatewayThis is the address of the device that links the local network (to which theAdderView CATx IP is connected) to another network such as the Internet.Usually this is a network switch or router and it will be used whenever a deviceto be contacted lies outside the local network.VNC PortThis is the logical link through which communications with a remote VNC viewerwill be channelled (see What is a port?). The default setting is 5900 which isa widely recognised port number for use by VNC software. However, in certaincircumstances it may be advantageous to alter this number - see Security issueswith ports for more details.Note: The VNC port and HTTP port can be set to the same port number in orderto simplify router and firewall configuration. If this is done then the AdderViewCATx IP will “listen” for both types of traffic on the single port.HTTP PortThis is the logical link through which communications with a remote webbrowser will be channelled. The default setting of 80 is an established standardfor web (HTTP – HyperText Transfer Protocol) traffic though this can be changedto suit your local network requirements.Clear IP Access ControlThis option removes all entries from the IP access control feature within theAdderView CATx IP. The IP access control feature (configurable by a globaladmin user) allows certain network address ranges to be denied access to theAdderView CATx IP. If set incorrectly, it is possible to exclude all network usersand so this option provides an emergency recovery point.Network ConfigurationThis page allows you to configure thevarious aspects of the IP port and itsrelationship with the local network.Mac AddrMedia Access Control address – thisis the unique and unchangeablecode that was hard coded withinyour AdderView CATx IP unit whenit was built. It consists of six 2-digithexadecimal (base 16) numbersseparated by colons. A section ofthe MAC address identifies themanufacturer, while the remainder is effectively the unique electronic serialnumber of your particular unit.Use DHCPDHCP is an acronym for ‘Dynamic Host Configuration Protocol’. Its function isparticularly useful when connecting to medium size or larger networks, such asthe Internet. When this option is selected, your AdderView CATx IP will attemptto locate a DHCP server on the network. If such a server is located, it will supplythree things to the AdderView CATx IP: an IP address, an IP network mask(also known as a Subnet mask) and a Gateway address. These are not usuallygranted permanently, but on a ‘lease’ basis for a fixed amount of time or for aslong as the AdderView CATx IP remains connected and switched on. Discoverallocations.IP AddressThis is the identity of the AdderView CATx IP within a network. The IP addresscan be thought of as the telephone number of the AdderView CATx IP. Unlikethe MAC address, the IP address can be altered to suit the network to which it isconnected. It can either be entered manually or configured automatically usingthe DHCP option. When the DHCP option is enabled, this entry is unavailable.