Veo Observer Manuel D’Utilisation

Page 39 of 65 

If your home or business LAN is connected to the Internet through a high  speed 
(broadband) Internet connection, with at least 128 kbps upload bandwidth, you can 
access your cameras by web browser from anywhere on the Internet. To do this you 
need to: 
 

1.  Know your WAN (Internet) IP address. This is the IP address that your Internet Service Provider gives 

you to access the Internet. It may be static (always the same) or dynamic (can change from time to 
time). 

2.  Makes sure the two ports used by the camera (80 & 1600) are forwarded by your router or gateway to 

the camera. 

3.  Makes sure your camera’s default gateway is set to the LAN (local) IP address of your router/gateway. 

 

 
The WAN (Wide Area Network) IP address that your Internet Service Provider grants you so that you can 
access the Internet is very different from the LAN or local IP address that your PCs and cameras are using to 
connect to your local network. Your WAN or Internet IP address is visible to the outside world (Internet) whereas 
your local addresses are not. To find your home or business network from the Internet you must know your 
WAN IP address. 
 
Your WAN IP address is stored by your gateway router which uses it to connect to the Internet. All the devices 
on your network connect to the Internet via your gateway router. You can find your current WAN IP address by 
checking your router’s status page. There are also various websites such as www.whatismyip.com which will tell 
you the IP address that you are currently using to access the Internet. 
 
 
 
 
 
 
 
 
Static versus Dynamic IP address 
 
The IP address (or addresses) your ISP has provided you will either be static, which means it never changes, or 
dynamic, meaning it can change periodically. Dynamic addresses present an additional challenge when trying to 
locate your network from the Internet since your address may have changed since the last time you checked it.  
How often your dynamic address changes varies from one service provider to another. Also, any time you 
reboot your cable or DSL modem, your are likely to get a new address when reconnecting. The solution to the 
ever changing IP address is known as DDNS or dynamic domain name service. A DDNS will allow you to find 
your network by a domain name, such as mynetcam.no-ip.com, rather than needing to know the IP address.  
Setting up a DDNS is covered in Section 7.6 Dynamic Domain Name Service (DDNS). 
 

 
Most home routers and business firewalls today perform something called NAT or Network Address Translation.  
NAT translates your external or WAN IP address into an internal address inside your gateway router. What this 
means is, you can think of your router as being divided into two halves, the LAN side (inside) and the WAN side 
(outside or Internet side). When a connection request arrives at your router from the Internet, it will not get any 
farther than the WAN side unless you have specifically instructed your router to pass this type of request to a 
specific device on your LAN. This process is know as port forwarding or port redirecting. 

Chapter 

7 

A word about terminology 
The term gateway is used generically to mean the device that connects a local network to the Internet. A 
gateway may be a router, a PC running software which allows it to act as a gateway such as a proxy 
server, or some other device. Most home networks use a NAT (Network Address Translation) router as a 
gateway. The term gateway router refers to such a device.