Difference between Dynamic and Static IP

Difference between Dynamic and Static IP

The major difference between dynamic and static IP is that dynamic IPs change every time one connects to the internet, while static IPs remain the same.

Internet Protocols, also known as IP addresses is a 32-bit number that is usually assigned to a computer when it connected to a network, such as the Internet. The IP address works similar to an actual address and lets computers know where to send data packets. The network devices use these address in order to communicate with each other.

The IP address are made up of 4 parts of numbers that are divided by dots (.) So, a typical IP address will looking something like – 72.169.189.01.

Although, the IP Based product / computers communicate with each other using IP addresses, to make it easier to remember the internet uses DNS or Domain Name System. This DNS is sort of an address book that pairs names to IP addresses. For example, if one wanted to visit the Google website, they would type in www.google.com in the address bar. The DNS will look up the IP address (74.125.239.35) paired with this name and will ping that address. Their system will respond back and the webpage will load on your computer.

There are two types of IPs – dynamic and static IP addresses. The major difference between dynamic and static IP is that dynamic IPs change every time one connects to the internet, while static IPs remain the same.

There are limited amount of IP addresses that are available and for this reason, many companies assign dynamic IPs, unless a static IP is asked for. So, every time a device is connected to the Internet, the IP address can change. This also allows the limited number of IPs to become reused, making it more convenient.

Broadband connections today lease IP addresses and use the DCHP dynamic IP address system. This system is also often considered safer, since the IP is always changing it makes it more difficult to hack the computer. Static IPs are commonly used by companies or people who require a similar IP address. The can apply for a static IP by paying a fee.

Comparison between Dynamic and Static IP:

	Dynamic IP	Static IP
Full form	Dynamic Internet Protocol	Static Internet Protocol
Definition	The internet protocol will constantly change	The internet protocol will remain the same
Cost Effective	More cost effective	Less cost effective
Security Risk	Lower	Higher
Upload/Download Speed	Slower	Faster
Good for	Good for residential user and small business owners	Web servers, email servers and other Internet servers. Also, for VOIP, VPN, playing online games or game hosting

Tukang Ngeblog | May 14, 2017 | blog, DDNS, DHCP., Difference between Dynamic and Static IP, DNS, IP Camera, Static IP

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Common Problems and Solution for IP Cameras

IP camera or network camera is a new product which combined with analog and network video streaming technologies, in addition to its image capturing functions like the conventional analog camera, IP camera has built-in video compression processor with web server function, to compress raw video footage, then broadcast over Internet. The authorized users can access the data from anywhere with internet connection. 
What's the common problem of IP camera?

1. Can't find IP camera when you use search software

Foremost, rechecking whether power supply and Ethernet cables are connected correctly. If the problem still exists, checking the network setting for IP camera and your computer/Laptop/tester. Go to network connection, configure IP address to same IP segments, Subnet mask and default gateway must be same for both IP camera and computer. Ensuring IP camera and computer are in the same router.

2. Can't visit IP camera from Internet (WAN)

For this problem, there are two possible factors. Firstly, there is no port mapping for IP camera. As we know, IP camera requires port mapping for remotely access from Internet (WAN). Without port mapping, IP camera is only accessible from local network (e.g 192.168.1.20). To solve this problem, you just need to log in your local router, and enable port mapping for IP camera in virtual server menu. Secondly, if you use domain or DDNS service, making sure the domain point to correct IP address with correct port number.

3. Connect 4 IP cameras, but only one IP camera displays images

This problem occurs when you didn't change the default IP address of IP cameras. After you bought the IP cameras, all of them were configured with a same IP address. With reason of IP conflict, when several IP cameras connect to router, one camera can work, but the rest of cameras can't connect to network. To solve this problem, you need to set an unique IP address for each of cameras.

How to change IP address for the IP Camera ?

Accessing the camera with default IP address (e.g 192.168.1.20), then login with default account information. Go to "Device Config", then choose "Network", you can change the IP address for the camera.

4. PoE IP camera can't see at night (dark images)

Insufficient power supply, which caused the PoE IP camera can't turn on Infrared illuminators, thus images are black at night. PoE (Power over Ethernet) is useful technology which greatly reduced the cost on IP camera installation. But it also has drawbacks; the voltage will drop when PoE IP camera connects to a PoE Switch or NVR. Typically, IEEE802.3af standard PoE only can transmit 20-30 meters. To solve this, user should use high quality Ethernet cable, or shortening the connection distance.

5. Video delay (video latency) when watch live video

Since network camera need to compress the video, before broadcast over Internet, every IP cameras encounter video latency, which is a common problem in IP video surveillance system. To minimize the video latency time, you can increase the bandwidth through upgrading your network infrastructure, also you can lower the bit-rate of streaming. Lowering the image resolution also helps to reduce the video delay time. Increasing the fps can allow IP camera output smooth video.

Do you experience any of these problems? Please make comments if these information is useful to you. If you experienced other problems which are related to IP camera, please write it down in below comment section.

6. IP camera can't display images

If your IP camera can't display images, also you are not be able to access the IP camera, likely the IP camera doesn't boot correctly. Almost IP cameras work with DC12V power supply, power requirements are different. You can estimate the power requirements on the basis of IR range.

·        No IR, or IR range within 20 meters: Required Power Supply DC12V 1A

·        IR range is within 20-30 meters: Required Power supply DC12V 1A

·        IR range is within 30-50 meters: Required Power Supply DC12V 1.5A

Please note: A regular PoE switch, supports IEEE802.3af, this standard only provides maximum 15.4W power, which means the provided current is 1.25 ampere. In conclusion, the regular PoE switch only can work with IP cameras which require no more than 15.4W power.

7. How to upgrade NVR firmware

If your IP camera connects to NVR, not all problems are caused by IP camera. Sometimes, the problem was caused by NVR. You may solve the problem through upgrading or updating NVR's firmware.

To update the firmware, you need to get the firmware file in a USB stick, which then has to connect USB port of NVR for upgrading.

Step 1. Go to "System Setting", choose "System" > "Upgrade"

Step 2. Select the firmware file, then click "Upgrade".

Step 3. When upgrading succeed, the NVR will reboot.

8. NVR can find IP camera but can't display image

If IP camera can be found through automatically search on NVR, this means the IP camera works properly, NVR detected and received correct video streaming parameters from IP camera. If your NVR shows video abnormal, you need to check the video resolution setting for both IP camera and NVR. The video resolution should be same as the NVR's recording resolution. If you use our IP camera and NVR, you need to choose the system's recording resolution as in below picture:

Choosing appropriate main stream and sub-stream resolution

Tukang Ngeblog | June 11, 2016 | blog, common problem of IP camera, DDNS, IEEE802.3af, IR Range, NVR, PoE camera, upgrade NVR, video footage, WAN IP Camera

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Dynamic DNS in Wireless CCTV Systems (For Beginners)

Wireless internet CCTV, also known as IP CCTV, communicates through your broadband line and onwards to the internet.  This can cause problems if your home broadband has a dynamic IP address, because when you want to connect to your cameras from outside, you won’t know what that address is.  This article shows you how to overcome the problem by using Dynamic DNS.

Most home ADSL packages still give you a dynamic or changing IP address, which is simply the address of your home’s network on the internet.  These addresses are allocated from a pool of available addresses and allow the internet provider to have fewer addresses than customers, saving money. 

This used to work well because early broadband modems “dialled” a connection when the attached computer requested it, rather like the old dial-up modems.  Nowadays, though, modern wireless modem/routers tend to remain connected permanently, so we are reaching the point where the internet provider is having to allow one IP address per customer, and may as well allocate a static or unchanging one.  However, as of today most people have dynamic addresses and this is an obstacle to contacting your wireless internet camera from the outside world, as I will explain in the next section.

Just as your broadband line has an IP address, so your camera has its own address or port.  For example, if your home IP address is 91.103.218.59 and the camera’s port is 8765, assuming your router is set up with port forwarding (outside the scope of this article) you can contact your camera by typing “http:// 91.103.218.59:8765” into a browser window.  This may work today, but by tomorrow that  91.103.218.59 IP address could have been allocated to someone else, and you will not find your camera on the end of it any more.  This is where Dynamic DNS or just “DDNS” comes in.

DDNS allows you to contact your wireless internet CCTV camera using an address that never changes, even when your broadband’s IP address changes.  It requires two things in order to work: a DDNS service provider and a router or camera that offers DDNS support.

Most modern wireless routers offer DDNS support, but few internet CCTV cameras do.  As long as either the camera or the router offers this feature, all is well.  First, you visit the website of the DDNS service provider and sign up for an account.  The most popular provider is dyndns.com and it’s free.  You choose your own unique internet address such as “mywirelesscamera.dyndns.org” and you will also have a user name and password.  (Incidentally, the purpose of this service is simply to make that link between your IP address, whatever it happens to be at the time, and a fixed address or domain name.)  Having registered a DDNS account, next you log into your router’s administration pages and find the DDNS section.

Here you simply key in the DDNS provider name, your account details and the address that you chose.  Now, whenever your broadband provider changes your home IP address, your router will tell dyndns.com, and this means you can always contact your camera from wherever you happen to be, by keying the same unchanging address into a browser window, in our example: “http://mywirelesscamera.dyndns.org:8765”.

Tukang Ngeblog | June 20, 2014 | ADSL, blog, CCTV IP, DDNS, PORT, Wireless Internet CCTV

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Router Compatibility for Internet Enabled Wireless CCTV Systems

The modern replacement for old analogue CCTV cameras is the wireless internet CCTV, also known as IP CCTV. The wireless CCTV system that is internet enabled has a great advantage over old system. You can see your property from anywhere in the world. You can see live images and video of your business property or your house, from wherever you are, just with the help of internet.

The technology has come in the market, but not many people know how to best use to. In order to get the best out of your wireless internet CCTV system, we must also look at the requirements and features that a router would need in order to be used successfully with the wireless system. There are a lot of things that goes into deciding your router for the wireless internet CCTV.

Broadband Type and Router Compatibility

You can have a broadband service that can come through either a phone line or a satellite CCTV box. In case the broadband service is through a phone line, you will require an ADSL modem/router also known as the DSL modem/router. Alternatively, if your broadband comes from your cable supplier, you would then require a cable router. This is another box that plugs in to your cable box.

The router part of your DSL modem/router or the cable router is basically the same. Manufacturers just make the DSL or cable version of the router that has the same features.

Router Features for Wireless CCTV System

• The router must be set up so that the port number, a special code, is allocated to the camera. When you type the IP address and the port number in the internet browser from any system, the router sees the port number and passes the message to the camera. Without this facility, it will not be possible to view your property through internet.
• With broadband suppliers changing your IP address at will, DDNS i.e. dynamic DNS support comes in. It helps you to use a third-party service to link a domain name you your IP address. The router’s DDNS feature makes sure that the router will tell the DDNS provider about your current IP address. Thus, even if your IP address changes, you can contact your camera with the domain name of the DDNS.
• Having your router remain connected is very important. This is important especially when you go out on a vacation. You don’t want to find that you cannot connect to your camera because your router disconnected due to power failure. In case of power cut, the DSL line or cable may drop for some time. Not many home routers are able to handle this, but with technology, new routers are able to reconnect by themselves after power cut. The router is able to sort itself out once the power is back and provides you hassle free access to your camera from anywhere in the world.

Thus, a router is an important device that enables you to monitor the security of your home and business’s wireless cctv systems from anywhere in the world.

Choosing Routers for Wireless Internet CCTV

Wireless Internet CCTV, also known as IP CCTV, is the modern replacement for old analogue CCTV cameras, and has the great advantage that you can see your property, live, from wherever you happen to be, using the internet. Now that the technology has become popular in homes and businesses, people need to know how to get the best out of it. In this article, I want to look at the minimum set of features that a router needs in order to be used successfully with wireless CCTV.

First, a quick note about types of broadband and router compatibility. Your broadband service is likely to come through your phone line or perhaps via a satellite CCTV box. If it’s through a phone line, you will need an ADSL modem/router, sometimes called a DSL modem/router. The modem part of the box is what talks to the phone line. On the other hand, if you have broadband from your cable supplier, you need a cable router. This is not the cable box itself, but another box that plugs into your cable box. The router part of a cable router or a DSL modem/router is usually the same, with many manufacturers making cable and DSL versions of what is essentially a router with the same features. Now, let’s take a look at the features you will need to get the most out of your wireless internet CCTV system:

• Virtual Server/Port Forwarding. This just means having the ability to set up the router so that a special code known as a port number is allocated to the camera. When you open an internet browser window and type in the URL or address of the camera, you add this special port number onto the end of the camera’s address, (e.g. for port 8765, you would type “http://:8765″) and when the router sees the port number it knows the message is to be passed to the camera. Without this facility, you would not be able to see your property over the internet.
• DDNS Support. It stands for Dynamic DNS and is used where the address of your home or business on the broadband system, known as the IP address, is changed at will by the broadband supplier. Most DSL broadband services have changing IP addresses, also known as dynamic IP addresses. Say you have an IP address of 91.103.218.59 (they tend to look like this) today, with dynamic IP addressing it could be something different tomorrow. This means you would never know what address to use to access your camera over the internet, and that is where DDNS support comes in. Basically, you use a third party service to link a domain name to an IP address. This service is provided by a separate DDNS provider and can be free, e.g. dyndns.com. The router’s DDNS feature means that the router makes sure it always tells the DDNS provider what your current broadband IP address is. Therefore, even if the IP address changes, you can always contact your camera by using the same dyndns address, e.g. “http://myipcamera.dyndns.com:8765″.
• Keep alive or auto-reconnect feature. This feature is all about making sure the router stays connected. You may have a power cut, or the DSL line/ cable connection may drop for a few moments. In these scenarios, you want the router to sort itself out. Earlier models of home router did not handle this well, and even today some can still be bought that don’t reconnect after a power cut or especially a broadband fault. The last thing you want is to go on holiday and then find you cannot log into your camera because a power cut several days ago left the router disconnected, so this is important.
• Encryption. Most routers these days offer some sort of encryption, usually known as WEP or WPA. WPA is stronger and preferable. Encryption is simply encoding the messages on your wireless network so that they cannot be intercepted easily. Make sure you get a router that offers at least one type of encryption that your wireless internet CCTV cameras offer. For example, it is no good getting a router which only does WPA encryption if your cameras can only do WEP.

As always, if what you have read here leaves you dizzy and you just want an internet CCTV system to monitor your home or business without all this technical complication, my advice is to get a fully-configured wireless CCTV camera pack from a specialist supplier.

Tukang Ngeblog | April 01, 2014 | blog, DDNS, DDNS Support, DSL, Enabled Wireless CCTV Systems, Port Forwarding, Router Compatibility, Virtual Server

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