→ DNS replies include a number, expressed in seconds, called time-to-live (TTL), during which a computer should cache that reply to use again.
#NO IP DUC FAILD UPDATE#
That’s because dynamic DNS services are designed to make it easy to update DNS records, and to tell the world quickly about the changes that just happened.
If they hack into your network today so they can use it to serve up infectious webpages, the dynamic DNS service will happily point their victims at your server.īut if you spot the attack and clean up the server, it’s a matter of moments for the crooks to get their dodgy hostname redirected to someone else’s hacked server to keep the cyberscam alive.
#NO IP DUC FAILD FREE#
That’s because free dynamic DNS services are of special value to cybercriminals.īy signing up for thousands of free accounts, they get someone else to do the hard work of keeping a large and innocent-looking list of static computer names reliably hooked up to an ever-shifting raft of malware distribution servers. That sounds like a win-win situation, but in the real world, it can end up a bit more of a win-win-lose. What dynamic DNS services do is offer you a domain name service (more accurately, a subdomain name service ) that not only converts a human friendly name like into an IP number, but also keeps that name-to-number mapping up to date whenever your IP number changes.īest of all, at least for home users, is that many companies like no-ip offer a free version of their service, in the hope of attracting paying customers to their premium offerings. It’s a bit like getting a new phone number: once every few years is OK, but twice a month would be far too often for convenience. Provided it doesn’t change in the middle of an online transaction, exactly what IP number you have doesn’t matter much.Īt least, it doesn’t matter for outbound traffic.īut if you want to run a server, or to let someone connect to you, then having a dynamic IP number, instead of a static one that survives router reboots and modem reconnects, is a real pain. Otherwise, an ISP with 65,000 IP numbers at its disposal could never reliably sign up more than 65,000 customers, even if no more than half of those customers were ever connected at the same time. → The purpose of dynamic IPs is to make IP numbers go further, and to allow ISPs to service more customers than they have IP numbers allocated to them. When your router reboots, or your 3G modem reconnects to the cellular network, you sometimes end up with a new IP number, handed out from a pool of avaialble numbers. Many ISPs use what are called dynamic IP numbers, allocated to your computer (or your network router) when you connect to their service.
You’re probably thinking, “How can you have an internet connection with no IP number?”, and, loosely speaking, you can’t.īut many users don’t have consistent IP numbers, those digital addresses that identify your computer, or at least your network, and look something like 198.51.100.75. Vitalwerks, which offers what are known as dynamic Domain Name System (DNS) services, is much better known by its trading name, no-ip. Four days ago, Microsoft went to court in the USA.Īs a result, the company succeed in grabbing temporary control of 23 internet domain names from a company called Vitalwerks Internet Solutions, based in Reno, Nevada.
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