Sometime around November of last year (2011), the popular Dynamic DNS provider, Dyn DNS severely limited their free account offerings (See reference link #1 at the bottom of the page).
They eliminated new free accounts from being created, citing that users could still get the 14 day pro trial.
I understand why they did it; they wanted to increase their profits.
However, the problem was that there were many how-to guides out there that referenced Dyn DNS’s free service; there were many hardware devices such as routers and IP cameras that were hard-wired to use Dyn DNS.
Pre-existing free accounts were grandfathered in, but with 2 very important restrictions placed on them: Many existing free users found that they were dropped down to two while some had their accounts expired because they didn’t do the update within a month.
Needless to say, this upset quite a few people and sparked much debate (See reference links #2,3,& 4 at the bottom of the page).
While exploring the options of my D-Link router, I came across Dynamic DNS page.
This type of router allows you to use multiple computers sharing one Internet connection and IP address through Network Address Translation (NAT).
A popular one is the Link Sys BEFSR41 4-port Cable/DSL Router.
If you have a static IP address at the location of your DVR, you can always connect to your surveillance system remotely using the same IP address.
If you have a dynamic IP address, things can be a little bit more complicated, especially if your DVR or IP camera does not have built-in DDNS support, because you never know when your IP address is going to be changed by your ISP.