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The myIpAddress function has often been reported to give incorrect or unusable results, e.g. 127.0.0.1, the IP address of the localhost. [5] It may help to remove on the system's host file (e.g. /etc/hosts on Linux) any lines referring to the machine host-name, while the line 127.0.0.1 localhost can, and should, stay.
Location is detected based on the nearest public IP address on a device (which can be a computer, the router it is connected to, or the Internet Service Provider (ISP) the router uses). The location depends on the IP information available, but in many cases where the IP is hidden behind an ISP network address translation , the accuracy is only ...
The PAC files are discussed in the Proxy auto-config article. Use caution when configuring a WPAD server in a virtual hosting environment. When automatic proxy detection is used, WinHTTP and WinINET in Internet Explorer 6 and earlier send a "Host: <IP address>" header and IE7+ and Firefox sends a "Host: wpad" header.
Link-local addresses may be assigned manually by an administrator or by automatic operating system procedures. In Internet Protocol (IP) networks, they are assigned most often using stateless address autoconfiguration, a process that often uses a stochastic process to select the value of link-local addresses, assigning a pseudo-random address that is different for each session.
Used for loopback addresses to the local host [1] 169.254.0.0/16 169.254.0.0–169.254.255.255 65 536: Subnet Used for link-local addresses [5] between two hosts on a single link when no IP address is otherwise specified, such as would have normally been retrieved from a DHCP server 172.16.0.0/12 172.16.0.0–172.31.255.255 1 048 576: Private ...
What is an IP address? An IP address is a series of numbers associated with a particular internet connection. Every computer is associated with an IP address whenever it is connected with the internet. Without it, web servers would not know where to send the web page you requested. How private is my IP address? It depends.
The general format of the field is: [2] X-Forwarded-For: client, proxy1, proxy2 where the value is a comma+space separated list of IP addresses, the left-most being the original client, and each successive proxy that passed the request adding the IP address where it received the request from.
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