1 00:00:00,000 --> 00:00:15,599 Hey everyone and welcome back to another skill. 2 00:00:15,599 --> 00:00:21,879 Okay so check this out, in the previous skill we introduced the topic of DNS, this is the 3 00:00:21,879 --> 00:00:28,519 domain name system and within that skill we learned that we could use DNS to ultimately 4 00:00:28,519 --> 00:00:34,039 resolve our IP addresses with particular domain names i.e. if you happen to look up 5 00:00:34,039 --> 00:00:40,640 google.com you are able to easily query and find out the IP address which correlates with 6 00:00:40,640 --> 00:00:41,640 that domain name. 7 00:00:41,640 --> 00:00:47,960 Out with this though we learned how we could actually set up our own caching DNS server. 8 00:00:47,960 --> 00:00:53,960 So what we're actually doing here as a very quick recap is all we're doing is asking another 9 00:00:53,960 --> 00:00:59,000 server for some DNS information and we are caching that information ourselves. 10 00:00:59,000 --> 00:01:06,799 So like I say if we happen to look up youtube.com or maybe cbtnuggets.com we can successfully 11 00:01:06,799 --> 00:01:09,400 retrieve that information and store it. 12 00:01:09,400 --> 00:01:15,280 In this skill though what we're actually going to be focusing on is how we can actually maintain 13 00:01:15,280 --> 00:01:17,480 our own DNS zones. 14 00:01:17,480 --> 00:01:19,719 So what do I actually mean when I say this? 15 00:01:19,959 --> 00:01:25,599 Well think about it, previously we had our little computer here and we would have some 16 00:01:25,599 --> 00:01:31,280 type of DNS server and if we wanted to talk to the internet, that is our cloud by the 17 00:01:31,280 --> 00:01:37,280 way, denoting the internet, so great drawing skills as per usual, when we want to reach 18 00:01:37,280 --> 00:01:43,480 the internet we send our query to our DNS resolver, we get the information back and 19 00:01:43,480 --> 00:01:47,480 therefore we can then use that information to make the correct request. 20 00:01:47,480 --> 00:01:53,280 Now like I say the difference here is what if we have our own domain. 21 00:01:53,280 --> 00:01:57,680 So let's say for example I created my own domain, let's maybe say something like I don't 22 00:01:57,680 --> 00:02:04,600 know IPv0.com, now this website doesn't actually exist, I do not own this domain but just play 23 00:02:04,600 --> 00:02:09,159 along so this could maybe be a corporate domain or a personal domain, it doesn't actually 24 00:02:09,159 --> 00:02:14,080 matter, the point is is that this is something we're going to maintain ourselves, it's going 25 00:02:14,120 --> 00:02:19,520 to belong to us and we're going to be responsible for its particular DNS records. 26 00:02:19,520 --> 00:02:24,400 Now in order to be able to maintain such a domain via our own servers, we're going to 27 00:02:24,400 --> 00:02:28,920 have to draw upon knowledge that we had learned in the previous nugget, this would be the 28 00:02:28,920 --> 00:02:31,200 different types of records. 29 00:02:31,200 --> 00:02:37,840 With respect to DNS remember we had that A record which we can use to resolve IPv4 addresses 30 00:02:37,840 --> 00:02:45,159 or we maybe have our quadruple A record for our IPv6 addresses, we also had a SOA record, 31 00:02:45,159 --> 00:02:51,080 we'll get to see that and things like an MX record and a PTR record, you get the drift. 32 00:02:51,080 --> 00:02:56,039 We had all of these different terms but we never really got to see them at play. 33 00:02:56,039 --> 00:03:00,480 The thing is in this skill right here we're actually going to get to make use of these 34 00:03:00,480 --> 00:03:06,400 particular records because in order to maintain our own zone we're going to have to create 35 00:03:06,480 --> 00:03:12,080 some very particular configuration files which will ultimately reference these records and 36 00:03:12,080 --> 00:03:15,480 give the correct values for these records. 37 00:03:15,480 --> 00:03:21,080 So really the main focus of this skill right here is all about this, it's these configuration 38 00:03:21,080 --> 00:03:27,400 files that we can use to host and maintain our own DNS zones, it's not about just being 39 00:03:27,400 --> 00:03:33,759 able to forward DNS requests to maybe say Google's domain name server and have Google 40 00:03:33,759 --> 00:03:36,799 sort out that information and pass it back to us. 41 00:03:36,799 --> 00:03:41,479 What we're going to do is we're going to invent our own fictional domain in this case and 42 00:03:41,479 --> 00:03:46,120 I'm going to show you how you can actually maintain these particular records. 43 00:03:46,120 --> 00:03:51,840 Now fair warning many people including myself, find this topic a little bit confusing when 44 00:03:51,840 --> 00:03:57,120 you're first presented with it but hopefully if we go through it slowly enough and carefully 45 00:03:57,120 --> 00:04:01,959 enough you're going to be able to correctly implement this zone and then walk through 46 00:04:01,959 --> 00:04:03,439 the process yourself. 47 00:04:03,479 --> 00:04:08,159 So now that we know what we have in store for this skill, how about we begin walking 48 00:04:08,159 --> 00:04:14,240 through the basic configurations that we need in order to create our own DNS zone and well 49 00:04:14,240 --> 00:04:16,759 that's what we're going to be doing in the very next nuggets. 50 00:04:16,759 --> 00:04:20,120 I hope this has been informative for you and I'd like to thank you for viewing.