An IP address is a unique network-level identifier assigned to a network-enabled device.

learn more… | top users | synonyms

4
votes
3answers
18k 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 ...
4
votes
10answers
27k 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
6answers
1k 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
12k 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
4answers
155 views

Comparing the first part of a string in Excel

I'm trying to create an automated function that will determine the class identification for IP addresses after you input it into Column A's input section by checking the first section of the address. ...
4
votes
2answers
2k views

Why does computer connected via wireless and wired have different address but same name?

I have a Thomson TG585 v7 router that can be access via a webbrowser on ipaddress http://192.168.1.254/ I have various computers connected to it via wireless or ethernet in some cases both and I've ...
4
votes
1answer
1k 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
2k views

how do I get 0.0.0.0 to resolve to localhost when browsing a url that contains 0.0.0.0?

Doing some node development on windows. Node programs like to kick out URLs that look like http://0.0.0.0:8080. In Linux (iirc) pasting that url into the browser will be successful. But in Windows, ...
4
votes
1answer
14k views

Get Hostname from IP address/MAC address

I have a list of IP addresses and MAC addresses connected to my local network, but I need to get the hostnames of each device, is there a command line or terminal (mac) command for this?
4
votes
1answer
2k 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
4k 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
3answers
28k views

Configuring static IP address for using Remote Desktop Connection

I have a static IP address provided by my ISP. I have three machines at my home. I want to remotely access one of my machines (Windows Server 2003) using Remote Desktop Connection from any location. ...
3
votes
4answers
2k views

How can I know IP address of the sender in Gmail/Yahoo/Hotmail?

Is there a way to know sender's IP address sent in Gmail/Yahoo Mail/Hotmail any mail?
3
votes
3answers
720 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
4answers
3k 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
908 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
6answers
10k views

How to find ip address of my Asus RT-AC86U in Access Point mode?

I'm using an Asus wireless router model RT-AC68U and can connect fine to the internet using it wirelessly. I configured the router to be an Access Point, but having done so, I can no longer locate ...
3
votes
4answers
2k 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 ...
3
votes
3answers
1k views

Understanding the static IP I just purchased

I just purchased a static IP from my ISP. The tech installed a cable modem and gave me some information: IP Address: 1.2.3.61 Gateway: 1.2.3.62 Subnet Mask 255.255.255.252 I could mindlessly ...
3
votes
1answer
499 views

What does “ :: ” mean in my connections ? (“TCP local address :: port 49157”)

It says: TCP local address :: port 49157 remote port N/A etc. status listen There are several connections listed under svchost.exe, services.exe, Issas.exe, wininit.exe, system. I have no ...
3
votes
3answers
2k views

How can I hide my IP without using a proxy?

I've been trying to do this for some time. I have installed Hamachi and used in correlation with privoxy. This is all well and good except I'd like to accomplish this without the use of a proxy ...
3
votes
3answers
2k views

Ping [computer] get strange IP address

On my local network, I have multiple computers that I connect to. I don't typically remember the IP address nor do I care. This morning, I went to RDP put "Sam" in the field and pressed enter. It ...
3
votes
2answers
3k views

I'm using Cisco Packet Tracer for Simulation and got error “ip address overlaps with..etc”

The 1st row is for my router and the 2nd row is for my LAN. What's wrong? Is my IP addressing and subnetting wrong? I already checked my configuration.
3
votes
2answers
484 views

Why can I ping 127.1?

I know IPv6 allows consecutive zeros to be omitted. But how about IPv4? I haven't found any reference to this on the Internet, including Wikipedia and RFC 791 – Internet Protocol. This document ...
3
votes
3answers
3k views

Find all past desktop IP addresses

Is there a way to find some type of log file that saves all IP address that were assigned to a desktop? I changed an static IP of a desktop (switched it to DHCP) of mine and i can not recall what the ...
3
votes
1answer
4k views

How can I use multiple IP-addresses, multi-homing, on a Windows 7 machine?

Is there an easy way to set up multiple IP-addresses (multi-homing) for a Windows 7 machine? Today the machine is on a LAN and the IP-address is allocated by DHCP, I can change to static address ...
3
votes
3answers
993 views

How to troubleshoot DHCP problems?

This question was originally titled "How to gather information about suspicious wireless access point?" but then this topic has been moved to another question, leaving here discussion of connection ...
3
votes
1answer
6k views

Assign IP's to certian mac addresses in dd-wrt

I have a Linksys WRT54G/GL/GS that I am running DD-WRT v24-sp2 (10/10/09) vpn - build 13064 on it and for the life of me I can not find a way to assign ip's based on Mac address. Basically I have a ...
3
votes
1answer
190 views

Understanding the black magic of IPv6 addresses

my router (AVM Fritz Box) is supporting 6to4. So far it works but I want to understand what's going on. The last few hours I spent on a IPv6 book. There are many things I understand now but there is ...
3
votes
2answers
2k views

How to configure to run two Browsers with different IP address?

I have two IP addresses assigned by my ISP, and I want to use both. I'd like to assign each one to a different browser. Is this possible? What do I need to do to achieve this? My OS is Windows ...
3
votes
1answer
4k views

How can i assign multiple IP addresses to an NIC (possibly software solution)?

I am connected to a network that assigns my IP address via DHCP, but i also need to assign my NIC an IP address that is not in the network's address range. Is this possible, maybe with some "virtual ...
3
votes
1answer
288 views

IP Address Range Calculation Logic

I want to calculate Network Address Address Of First Host Address Of Last Host Broadcast address when an IP address of the network is given. is there any standard calculate to solve this ...
3
votes
1answer
5k views

How to set the same static IP address for LAN and wifi interfaces on a Win7 laptop?

When I'm at my desk at home, I connect to my network through my Ethernet LAN port. Sometimes however I have to get up and move my computer around (such as to connect it to a TV in another room), so I ...
3
votes
3answers
4k views

Full URI to a file on another machine in our local network?

On our small-business Windows XP network, I have a file in f:\MyDir\SubDir\text.doc What would be the URI for that file while I'm on another machine.... if all I knew was that machine's IP address, ...
3
votes
1answer
2k views

VirtualBox Issue: virtualbox changed my Computer Name's ip address in Windows

I had installed virtualbox 4.2.2 in Windows 7. My Computer Name is: MY-PC My IP address (using ipconfig /all command) is: 192.168.1.101 My IP is dynamic and I set DNS to google dns (8.8.8.8) When I ...
3
votes
2answers
4k views

How to blacklist IPs on Windows 7?

I'm trying to find something similar to iptables in Linux for Windows. I've tried using Windows firewall as well as editing the host file to block specific IPs, but had no success. I've also tried ...
3
votes
1answer
2k views

Could you help me to understand netstat output?

I am trying to figure out how to get IP of a suspicious access point I am using to access the internet. Running netstat, I get the following: $ netstat -rn Routing tables Internet: Destination ...
3
votes
3answers
3k views

LinkSys router suddenly cannot get an IP address

I have a linksys router WRT54G2 connected to a cable broadband. Just last week, everything was working perfectly - I would be able to connect my laptop to the internet using WiFi. However, starting ...
3
votes
1answer
566 views

My wifi is now connected to 2 different networks on my Wifi

I tried setting up 2 different IP addresses on my laptop but what ended up happening was now I got my Local Wifi network + the "Unidentified Network" on my Current Connections. How do undo this? I ...
3
votes
1answer
1k views

How to use different ip address between virtual machine and your laptop?

How to use different ip address between virtual machine and laptop. For laptop, my os is mac. And within my laptop, i run a virtual machine (vbox). The os within vbox is ubuntu 11. Thank you.
3
votes
5answers
1k views

how IP ban system works

Can anyone tell me how the IP ban system works. I have Dynamic IP, every time i start my PC I have a different IP. I want to know how a site (like a chat system) knows my IP and it keeps me banned... ...
2
votes
5answers
8k views

Can you have a class C IP address with a subnet mask of 255.255.0.0?

Can you have a class C IP address with a subnet mask of 255.255.0.0? What happens when you have a setting like this?
2
votes
4answers
7k views

In computer networks, when is a MAC address used and when is an IP Address used?

MAC address and IP address are used to uniquely identify a computer. When is an IP address used and when is a MAC address used?
2
votes
3answers
785 views

Opera doesn't recognize 0.0.0.0 as localhost. Is this behaviour standard-conform?

Opera (version 10.10) under Linux (don't know about other OSes) does not recognize http://0.0.0.0/ as local address (http://127.0.0.1/) , while Firefox does. What is the difference between these ...
2
votes
2answers
2k views

Why can't IP addresses start with 0 or 255?

It was specified somewhere (presumably in an RFC) that Class A addresses range from 1-126 in the first octet, and that class E addresses range from 240-254, but that leaves out two potential networks ...
2
votes
3answers
4k views

Class D ip address

Is there mask for class D ip address? As it is for multicast, I am not sure about it. I read somewhere that D ip addressas are 32-bit network addresses and they dont have hostID, but in the following ...
2
votes
2answers
3k views

Difference between intranet IP Address and internet IP Address

My computer has 2 IP Addresses, one is 192.168.1.100 and the other is 78.x.x.x. If connecting to a socket, what IP address would a program outside of my network use, and how would it differentiate ...
2
votes
3answers
2k views

Networking: Connecting Two Networks in Home (Floor # 1 & Floor 2)

I have a home networking question. I have two wireless routers having their own network. I want to connect these two networks so their clients can access each other. Following is the configuration. ...
2
votes
2answers
2k views

How to improve my router settings and stop these access attempts to my network

I have a network at home. ISP modem connects to my router which connects to my computers and laptops. When I look into my router logs I see a load of blocked access attempts. I was wondering if I can ...
2
votes
7answers
18k views

D-LINK DIR-615 router keeps giving my wireless devices bad ip addresses

I have a D-LINK DIR-615 router, and wired devices have no problem getting an IP, however; wireless devices end up with a 169.254.. address (subsequently, they cannot access the internet through the ...