An IP address is a unique network-level identifier assigned to a network-enabled device.
264
votes
4answers
34k views
Why does pinging 192.168.072 (only 2 dots) return a response from 192.168.0.58?
I mistakenly missed the dot off of an IP address and typed in 192.168.072.
To my surprise I connected to a machine at 192.168.0.58
If I ping 192.168.072 I get responses from 192.168.0.58.
Why is ...
35
votes
14answers
8k views
Fastest method to determine my PC's IP address (Windows)
This may seem trivial but I'm looking for the quickest method to determine my PC's IP address within my network.
This changes regularly as I connect from one network to the next via DHCP
The ...
21
votes
10answers
88k views
How can I make my IP address appear to be from another country?
How do I make it appear that my IP address is coming from one country while I'm located in another?
I live in Germany and some websites (like Hulu or Youtube) don't work because my IP isn't in the ...
20
votes
3answers
24k views
Why is Windows' default IP address 169.xx.xx.xx?
My Windows system got an 169.xx.xx.xx IP address the other day, and I fixed the issue, but why did Microsoft chose this address as the default?
Why not 1.xx.xx.xx or 255.xx.xx.xx? Did one guy at ...
20
votes
6answers
12k views
Why is there a difference between ping “localhost” and ping “local IP address”?
Using cmd and ping on Windows gave me the following results:
Pinging "localhost":
Pinging "192.168.0.10" (local IP address):
Aren't both situations exactly the same?
I mean, I'm pinging ...
20
votes
14answers
9k views
IP Address vs MAC addresses
why do we need ip addresses if mac address is enough to identify the machine???
16
votes
5answers
677 views
How to go to a website on a shared server by its ip address?
I have a few questions, please help:
Fist, I can access Google search just by typing http://74.125.224.211, because this is the IP address returned by nslookup.
However, I could not do so with the ...
14
votes
8answers
32k views
How can I ping a range of IP addresses simultaneously
I have a bunch of machines on an IP address range which I want to ping simultaneously as a quick and dirty way of telling which ones are switched on. What (free) software can I use to do this?
I'm ...
12
votes
2answers
935 views
What about IPv4 class E?
IPv4's class E network (240.0.0.0/4) contains 268 million addresses. Despite the advertisements for IPv6, claiming we have ran out of address space, this block ironically still claims to be "Reserved ...
11
votes
6answers
12k views
How To Resolve IP Addresses To Domain Names?
I know it is possible to resolve IP addresses to host names but can IPs be resolved to domain names?
11
votes
1answer
6k views
What is 127.0.0.2 IP address for?
I'm running the example in hiredis, which is using "127.0.0.2" as the redis server IP, and it is running properly. Actually, the redis server is running on the same machine. I know that "127.0.0.1" is ...
9
votes
4answers
255 views
How to put two subnets next to each other?
I've been using this calculator http://www.subnet-calculator.com/cidr.php, and I'm trying to figure out how to put two different subnets next to each other.
For example, I want to have a /27 subnet ...
8
votes
6answers
915 views
What do the different formats for network addresses indicate?
I've seen the following forms for network addresses:
10.1.1.0
172.16.1.0
192.168.1.0
I usually see 192.168.1.0 for my home network address. Sometimes I've seen the other two forms listed above. ...
8
votes
2answers
4k views
Mac OS X: Please explain ifconfig output?
When I do ifconfig on my Mac, I get a list of the following interfaces:
lo0
gif0
stf0
en0
fw0
en1
vmnet8
vmnet1
I wonder what each interface is. Also, which of these is the IP interface ? I don't ...
7
votes
9answers
1k views
Tracking my home IP from anywhere on the internet?
I have an ISP that serves semi-permanent IPv4 addresses. They can't promise fixed IP addresses, but unexpected changes are quite rare.
This begs me to ask however: what would be the easiest/most ...
7
votes
9answers
9k views
Can ping fine but no browsing
I've got a laptop which has a verified internet connection. I can ping www.google.co.uk and receive a response no problem. However IE, Chrome, Firefox, MSN messenger cannot connect to the internet.
...
7
votes
5answers
530 views
Is it possible to get your router's external ip address without using a website?
I was wondering if there was a way to find out your router's ip address without using a website like www.whatismyip.com.
I searched around, and I am beginning to think it is impossible. If that is ...
7
votes
3answers
708 views
Why do the IP addresses randomly change?
I have a network with the following:
Cable modem with static IP address
Router
Desktop - Win 7
VM Host - VMware ESXi 4.0
A couple of VM Guests - Windows
Every now and then my Win 7 PC is unable to ...
6
votes
3answers
1k views
How can I make my PC always take the first local IP from the WiFi router?
I share multiple devices on a single WiFi router. They all are assigned local IP addresses (192.168.x.x) depending on a first-connect, first-assigned basis I think.
Is there a way to make one device ...
6
votes
2answers
343 views
What public IP should I use for long-term network test?
What IP address is OK to ping -f for a prolonged time (the whole day)? "4.2.2.2" or something else?
The main concern is the admins there that may decide that it is some DoS and block/complain...
...
6
votes
3answers
193 views
Two websites give different values for my IP
I just found something curious:
http://whatismyip.org/ says my IP address is 82.44.14.246
http://www.whatismyip.com/ says my IP address is 31.52.118.197
I'm based in the UK and behind a router ...
5
votes
6answers
10k views
What regular expression can I use to match an IP address?
With the following grep syntax I want to match all IP address in a file (from a ksh script)
grep '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}' file
The problem: It also matches words ...
5
votes
5answers
3k views
How to know the IP address of a Mac when it is in network
My Mac mini is connected in a network ( LAN ).
As every one knows, each system in a network - has a unique ip address.
My Mac mini's IP address is: 192.168.32.164.
My Mac is connected to the network ...
5
votes
3answers
773 views
What happens when all IP addresses run out?
I recently read an article in which they wrote that that there will be a time when there will be no more IP addresses available. Is that right? Do I need to register a website now just in case?
5
votes
6answers
16k views
Set up two (2) IP addresses on the same network card?
I think it is possible to set up 2 IP addresses and subnet masks on one NIC in Windows XP.
How can this be done?
5
votes
3answers
4k views
What is the maximum number of IPs that can be assigned to a given computer?
I really need to know this for a linux server, but since it also applies to client OSes, I figured the question should be posed here instead of server fault.
5
votes
4answers
429 views
Duplicate IP Adresses
My roommate and I are experiencing a problem in that our computers have the same IP address. I have a laptop and he's got a desktop, and only recently did this occur, in the past day or two.
Is there ...
5
votes
2answers
4k views
How can I specify IP and ports for a hostname in the Windows hosts file?
I want to specify host names with two different ports in the Windows hosts file.
Is there a way to do it? Or is it not allowed by Windows itself?
I have been wasting my time searching for the ...
5
votes
7answers
12k views
Show all machine's internal IP addresses (Windows XP)?
I have 3 Windows XP machines connection in a small home network.
(2 of the 3 have no screen or keyboard.)
What's the easiest way for me to find out each of the machines internal IP addresses?
Is ...
5
votes
1answer
6k views
How does a NAT server forward ping ICMP echo reply packets to users?
NAT uses an IP address port number combination to hash the outgoing requests. Since ping requests consist of ICMP echo request packets, they do not have any associated port number. How does a NAT ...
5
votes
2answers
13k views
How to get the real IP address of someone using a proxy?
I was researching digital goods and security when I stumbled upon this company. One of the services they provide is "Real IP". They claim to be able to get the real IP address of users even when ...
4
votes
7answers
6k views
Make dynamic IP address fixed?
I am using Time Warner cable internet service. My IP address changes every couple months. However, I need to access some access limited servers which has firewall rules on it.
Is there any way to ...
4
votes
8answers
583 views
Getting my IP address?
My system has a dynamic shared IP provided to me by my ISP. I want to give my IP address to a friend so she can allow access to her server for requests coming from my IP.
Can someone please tell me ...
4
votes
5answers
252 views
Home IP Address Management?
Are there any better, free solutions to managing static IPs at home than a spreadsheet?
4
votes
3answers
12k views
Whats the meaning of 10.0.0.1/24 address of my computer (ip addr - command)?
Whats the meaning of 10.0.0.1/24 address of my computer (ip addr - command)?
1/24 and not 0/8
10.0.0 range and not 192.168.10
4
votes
1answer
264 views
Why does MacOSX try to resolve zero padded IP addresses as host names?
This one caused a friend some headache when setting up a switched internet connection which had zero padded IP addresses in the configuration paper like so:
192.168.019.254
No matter how he tried to ...
4
votes
6answers
771 views
user friendly name for ip address on home network
How can I set up some sort of local DNS service, so that instead of using ipaddresses to do things like VNC and remote desktop a more URL like thing can be used.
All the devices on a network have a ...
4
votes
3answers
8k views
Is it possible to get the NAT Ip Address?
is it possible to get my nat ip address across the Internet? I know I can see my ISP address but not my internal address. I remember seeing this done one time but I am thinking it was a java applet ...
4
votes
8answers
8k views
Getting IP Address of Access Point
recently I turned my Router to a wireless access point for my home network. Unfortunately, I forgot to note down the AP's IP Address and Subnet.
How do I reliably get the IP of my AP?
Thank's in ...
4
votes
1answer
722 views
IP address spoofing using Source Routing
With IP options we can specify the route we want an IP packet to take while connecting to a server. If we know that a particular server provides some extra functionality based on the IP address can we ...
4
votes
1answer
570 views
How to really change programmatically ip address without reboot (with no connection too)?
Really, I tried everything, and there is no solution that works for me.
WMI - everything perfect, but I can't change ip address when there is no connection. O_o Are you joking me? How can I make a ...
4
votes
3answers
1k views
How does geolocation based on IP address work?
As all Internet users, I've visited web sites which appear to know in which country and city I'm located. I understand that these web sites typically look up my IP address in a database which maps IP ...
3
votes
2answers
577 views
I'm Looking For A Good Resource For Learning DNS, IP, and Network Addressing
Any recommendations on books, websites, or other resources for learning Internet Protocol, the ins and outs of DNS and how Networking and IP Addressing works? I have a fundamental knowledge of this ...
3
votes
3answers
351 views
Wireless router's ip address
Does my wireless router have an ip address that's independent of my computer's ip address? Is there any way to determine what that ip address is? Note: I'm not talking about the internal router ip ...
3
votes
3answers
6k views
How To Find My Previous IP Addresses
Is it possible to find out what IP addresses a computer has been assigned by their ISP in, say - the last six months? I know the current IP address but would like to see the one before that, and ...
3
votes
4answers
2k views
finding IP address using Linux command prompt
I'm looking for a way to get my IP address using the command prompt in Linux. I know when you type "ifconfig" you can get your local IP address (i.e. 192.168.0.103), but I'm looking for my IP address ...
3
votes
3answers
657 views
Why can I no longer access a particular website that I have been visiting for years without issue?
There is a private forum site that I have accessed without issue for a long time. As of about 2 weeks ago, without warning, I suddenly cannot access the site through any browser.
My first assumption ...
3
votes
3answers
7k views
How to block incoming connections from one IP address?
I have found out that one IP address is trying to RDP to a machine.
I would now like to get XP to block all incoming connections from this IP address, and I am finding it very frustrating how ...
3
votes
1answer
944 views
How many characters can an IP address be?
I have to create a field in a mysql table to store ip addresses. I need to know the maximum characters an ip address can possibly be. Whether ipv4, ipv6 or some other type that can render a valid ip ...
3
votes
4answers
1k views
How often do users change their IP address (average time needed)?
Basically, i need to know how long (on average) and ip address is used per user, this can be US-only stats or World-Wide stats, if you have a source please state it. If its your own data please let us ...
