Helping people with computers... one answer at a time.
A computer's IP (Internet Protocol) address identifies it on a TCP/IP network. There's a lot of concern about what can or cannot be determined from an IP address, or even how to find an IP address. IP addresses are a critical component of network data transfer.
Resetting a router can cause it to revert to its default. If you'd been using a static IP it may revert to dyanmic configuration, but is that theft?
IP addresses can seem confusing; email headers have them, routers have them, web pages have them... how do you sort it all out?
Your IP address is set by your internet provider so that they can identify your computer and send you information from the internet. Changing it to set up a static IP address may not have the result that you expect.
Remote Desktop is configured to keep your home computer secure while you connect to it from a remote machine. Doing this correctly requires the right software and permissions.
On a NAT router any unrequested outside connection is blocked. Using the DMZ is a good workaround.
IP addresses are encoded into email headers. But if you get two emails from the same IP address you can't assume that they came from the same computer.
Once you've been assigned a static IP address you'll need to configure the network-connected device manually to use it. We'll look at how.
Determining your IP address is easy, but we first have to ask: which IP address do you want? I'll look at determining both.
A subnet mask is one part of the information used to make a network connection. For most people, it's something you need never know about.
Internet users often want to identify who someone else might be with only an IP address to go on. It's just not something you and I can do.
The DNS servers used on your computer are most likely specified by your ISP. I'll look at how to tell what they are and how to change them.
Getting a new IP address on the internet can be difficult. The real issue is that a new IP address may not solve the problem you're facing.
If it's certain that a neighbor is using your IP address without permission, you need to take steps. But first, you need to make sure.
Many online polls and voting tools use your IP address to keep track of the number of votes you've made. Unfortunately that technique is flawed.
Mapping a domain to an IP address is very easy with several tools, both on your machine and on the internet. I'll look at the two I use.
DNS transforms domain names into IP addresses. Your PC caches or remembers much of the DNS information but sometimes, though, it needs to forget.
Determining your own IP address is very easy, but it first requires understanding which IP address it is you want to see.
DHCP is a fundamental technology to assign IP addresses to computers connected to a network. There are scenarios where DHCP might be spoofed.
When you dial-up to get an internet connection you typically get a different IP address each time. Is that safer or more anonymous? Not really.
If you connect to the internet as most users do your machine will be assigned a dynamic IP address that can change without notice, or any real effect.
You cannot hack an IP address, as it's fundamental to routing data on the internet. However, there are scenarios where IP addresses can appear the same.
Conventional wisdom says two computers can't have the same IP address. Technically true but incomplete. The same IP can be used on different networks.
Google has begun offering DNS services. I'll look at what that is, why that is, and whether or not it's worth your looking into.
To connect to your router, you first find your gateway address and type that into the address bar of a browser window: I explain how.
Two computers should never have the same IP address if they're on the same network. If they do, results are unpredictable.
One of the oldest diagnostic tools, ping simply validates connectivity from point A to point B and doing so provides additional useful information.
A subnet mask is a way of telling your computer or router what network addresses it can consider local and which are remote.
We'll look at some of the specific information that you're making available to every website you visit, and briefly explain each.
It happens at some part of the boot process. It's independent of when you login. It's just that sometimes it takes a little longer than others.
169.254.x.x IP addresses are self-assigned when your computer can't get an address any other way. It's an almost sure sign of a problem.
If there is a conflict with your IP address, it could result in only one of the machines on your network working at a time.
It's not uncommon for tens, if not hundreds of websites to be located on a single web server. When that happens, an IP address just isn't enough.
IP address blocking frequently has an unintended side-effect: you could end up paying for someone else's bad behavior.
Websites can be cleaned from your drop-down menus and IP addresses can change. That in itself is not indicative of a hack. A few steps will increase security.
Recent news reports about the transition to IPv6 have many people concerned. For the average consumer, I believe there's little if any immediate impact.