Figure 55 Specify Upnp External Port Page - Grandstream Networks GVR3550 User Manual

In order to access GVR via internet, you also need to enable UPnP and set port. If the DDNS type you select
is ipkan, go to www.ipkan.com.cn to register username and password. Upon successful registration you can
fill in the username and password on DDNS Settings interface.
ENABLE UPnP
The full name of UPnP is Universal plug-in and Play, enable NAT of UPnP to realize auto port mapping thus
allows external computer to access intranet to enhance network efficiency.
After checking Enable UPnP , users can click to set external port, as shown in figure 54.
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Figure 55 Specify UPnP External Port Page

When the port status displays Active , it indicates the successful connection of the GVR and the router, the
" "
parameters have taken effect.
NOTE
:
The port sequence should correspond to the router list.
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ENABLE DHCP SERVER
GVR3550/GVR3552 could allocate dynamic IP address to other devices within the same LAN. Follow the
procedures below to set:
1. Check "Enable DHCP Server";
2. Input the assignable IP address.
3. Input Lease Time;
4. Set DNS server address and the secondary DNS server address.
MULTICAST GROUP
When access GVR3550 via remote network to make real-time preview, if the users access exceed the maximum
network bandwidth, users will unable to preview, set multicast IP to save the problem.
multicast IP is D type IP address, the range is 224.0.0.0 ～ 239.255.255.255. It is recommended to use address
GVR3550/GVR3552 User Manual Page 71 of 121
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