Instead the ability to automatically update the DNS server records is built into most NAT routers. We could of course do this manually, but that would be very unreliable as you don’t know when it has changed unless you check. Now because this external IP address will change periodically we will need to update the DNS record periodically. We then assign the external IP address to the name. This name is fixed and provided by the DDNS service provider. With Dynamic DNS we assign the web server a name which we can then give to external clients. If we now introduce a Dynamic DNS service into the picture. In addition, the external client has to remember the IP address. However the external IP address IPex ( 81.157.34.43) may also be dynamically assigned by the ISP, and we cannot make it static unless we pay for a static address. If we put some typical numbers into this we will see our web server atĪll we need now do is to tell our external client to use these values. Now our web server appears to our external client to be located at IPex and on port Portex. To make the web service available on the internet we use a technique called port forwarding ( see the port forwarding and Internal vs external IP address tutorials for more details). However when making a service available on the Internet we will usually give it a static internal IP address. The Internal IP address is assigned to the internal server by the NAT router and via the DHCP service. The network diagram below shows the configuration In the following discussion we are going to assume that we want to make a web server located on an internal server available on the internet. Home networks typically uses a NAT router to connect to the internet which means that devices located on the internal network aren’t accessible from the Internet. Dynamic DNS (DDNS) -Setup and Useĭynamic DNS Services are used by small companies and individuals when they want to publish a service on the Internet, and that service is hosted within an internal or home network. In this tutorial we look at how dynamic DNS works and how to set it up on a home router. However small companies, and home networks don’t normally have their own DNS server so why would they need Dynamic DNS ? This entry was posted in SecuritySpy and tagged customise, customize, edit, html, interface, securityspy, web on 4 September, 2014 by Ben Software.Dynamic DNS keeps DNS records automatically up to date when an IP address changes.ĭynamic DNS is used in large networks that host internal services, and use their own internal DNS and DHCP servers. There are settings pages too, but these change from time to time with SecuritySpy software updates, so it’s not recommended that you create your own. mainlogo.png – the image that is displayed at the top of the main page.download.html – the page that displays the list of captured footage.live.html – the page that displays the live camera feeds.index.html – the main page that is displayed when opening the web interface.Here are some of the main files used in the web interface: When SecuritySpy looks for a resource to deliver via the web server, it will first check this user location, and if the file doesn’t exist there, it will use the file from its application bundle web folder. Then, modify the file in this user location. To get to this folder, click the Go menu in the Finder, select Home, then navigate into the SecuritySpy folder. (Note: in older versions of SecuritySpy, the location of this folder is ~/Documents/SecuritySpy/Web/). It’s important that you don’t modify these files directly instead, for any file that you want to customise, copy it to the ~/SecuritySpy/Web/ folder. Within the SecuritySpy application bundle, navigate to Contents/Resources/English.lproj/Web/ – all the files SecuritySpy uses for its web interface are stored here. Right-click on the SecuritySpy application icon and select Show Package Contents. The procedure is quite simple, though it does require some knowledge of HTML and CCS.Īll the files used for SecuritySpy’s web interface are stored within its application bundle. We sometimes get asked by customers how to customise the appearance of these web pages for various reasons, such as to change colours, add branding, modify text etc. SecuritySpy has a built-in web server that allows remote viewing of live camera streams as well as access to previously-captured footage and settings.
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