SSL /TLS the Device Setting Enable / Disable (IMPORT and EXPORT)first then web Security
SNMP Device Setting ENABLE and Disable first after that use a PC same range to install SNMP software and Point to SNMP Device to Monitor (Eg. UPS, Printer and ETC)
Device enable or disable (SNMP)-----------PC same range download SNMP software to device IP
IGMP Device Setting Enable or Disable first then router IGMP setting to Choose VLAN for the same range of IGMP Device (IGMP device mostly IPTV)
IPTV device enable IGMP VLAN----------------Router Enable IGMP and choose VLAN of IPTV
UPNP device like NVR enable then UPNP in the router to enable or disable auto open suitable port for all the ip Address range but still need to set IP address port forwarding and the NVR or Other Device must Enable, if device no UPNP the router must must must disable UPNP if not will have error some times cannot access.
upnp device (enable or disable)--------------router then design to enable or disable
DMZ setting from Router only one IP Address Allow to use once used DMZ can not use Port Forwarding, because DMZ already open all port for that one IP address.
Port Forward is the device with ip address got port then got to router to set port for the device ip address and port in order to access the LAN device from WAN with the device ip address and port. (eg: FTP, http, https, email, pptp, lstp and smtp and ETC......)
Device must know IP address and port-------------Router must set port forward device IP and Port
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