ala888 Posted August 8, 2014 Share Posted August 8, 2014 Like the title says, whats the point of private IP addresses? Since my network is going to pass through a router en route to the internet, and get NAT translated anyways, cant I designate an arbitrary IP address block for my network? Ex. 24.1.0.0/16 rather than something like 10.0.0.0 ?What are the ramifications of doing this? Link to comment Share on other sites More sharing options...
justsomeguy Posted August 8, 2014 Share Posted August 8, 2014 Which network? You can theoretically set an arbitrary block for an internal network, although there will be problems if you choose a block that is allocated to something else. If you say that your network has the same IP block as Google, then you won't be able to reach Google from your network. There are network blocks specifically reserved for use as private networks so that they won't conflict with other addresses. Some routers only let you use those blocks, others will let you specify anything and assume that you know what you're doing. Link to comment Share on other sites More sharing options...
ala888 Posted August 8, 2014 Author Share Posted August 8, 2014 Well, since I will be running a small personal website and wont need to search for google from my web servers, there should be no conflict, am I right?the internal network can literally be anything, and it would be a trivial fact - since the NAT of the router would be translating everything anyways. Link to comment Share on other sites More sharing options...
justsomeguy Posted August 8, 2014 Share Posted August 8, 2014 If you have Google's IP address assigned to one of your servers, then anything on the same network as that server will not be able to reach Google.In general, it's just not a good idea to use public IP addresses on private networks. The private network blocks are reserved for a reason; use them. Unless you can think of a compelling reason why the private network blocks aren't going to work in your situation. Link to comment Share on other sites More sharing options...
ala888 Posted August 10, 2014 Author Share Posted August 10, 2014 but for the sake of learning, it will work, right?as long as I dont care about contacting google.com via my web servers Link to comment Share on other sites More sharing options...
justsomeguy Posted August 11, 2014 Share Posted August 11, 2014 I'm not much of a network guy, it's hard to be specific about your situation. For my part, I stick to what I know is going to work and don't try to set things up that might fail for a reason that I haven't thought of. If there is a private network reserved for my use, I use it. Link to comment Share on other sites More sharing options...
davej Posted August 12, 2014 Share Posted August 12, 2014 Why would you want to do this? Are you hoping your ISP will terminate your service? Link to comment Share on other sites More sharing options...
Ingolme Posted August 12, 2014 Share Posted August 12, 2014 Why would you want to do this? Are you hoping your ISP will terminate your service? The ISP doesn't (and probably not legally allowed to) care what a person does with his own private network. Link to comment Share on other sites More sharing options...
davej Posted August 12, 2014 Share Posted August 12, 2014 The ISP doesn't (and probably not legally allowed to) care what a person does with his own private network. Well no, but I'm guessing that routers are designed to serve legitimate private IP ranges. If you do something really goofy then you would need to be careful. You don't want to generate illegal network responses outside of your assigned IP address. Link to comment Share on other sites More sharing options...
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