I'm working on a project which enables a web-based server which is accessible through 127.0.0.1:8081.
But I am not really able to understand the concept of the ip address. Does it mean the address is only available from the device which opens up the server, or across the whole LAN on any computer connected to that same router?
127.0.0.1 is a special IP address that refers to your local machine. Localhost resolves to this address. If you want to make your server accessible from the web or a different machine you will have to use a routable IP address.
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Using a network tool in an android phone, I found the Local IP and External IP as:
I believe both are the Public IP.
Pls be kind and let me know, what is Local IP and External IP in this scenario?
Regards
TekQ
The Local IP is the address that your provider (Verizon, AT&T, Sprint, etc...) uses to identify you on their network. The External IP is the address that websites (google.com, facebook.com, etc...) use to identify and communicate with you.
There is a translation process, known as Network Address Translation (NAT), that converts Local IP addresses into External/Public IP addresses. The NAT service is controlled by your cell network provider.
More information can be found on Wikipedia's Network Address Translation page.
hello I created a website with IIS. I open ports and everything. I can access this website from another network with ip and port
like http://81.215.xx.xx:81 . but with any computer with same network (LAN) I cant access http://81.215.xx.xx:81 like this. I can only access when I write the static ip of that machine. like http://192.168.1.3:81/
I want to access with external ip in lan how can I do that?
Your LAN most likely has another equipment, a router for example which has an interface with the other IP address, http://81.215.xx.xx:81. Your router forwards requests to your server based on its routing table. This routing does not exist when you are in the private network. That is why you can only access the server with its private IP address which is in the same range as your computer when you are in that network.
I've some doubts about a VPN.
I've been given a Cisco VPN client to connect to the LAN of my society. I use this to connect to a local server. I don't understand how the VPN is working.
I'm at home now. In the VPN Client I see an IP. If I go to http://www.whatismyip.com/ I see another IP, which is the IP I've when I'm also without the VPN Client, while I expected to see the IP of the VPN Client. If I use $_SERVER['REMOTE_ADDR'] I see another (third!) IP, while I expected the IP I see in the VPN Client.
Can you clarify please?
I need this to know if I'm identifies always from the same IP from the local server.
If I'm not mistaken, this should be correct. Please correct me if I'm wrong.
By default you have 2 IP addresses.
Local IP: IP address used to identify yourself within your LAN.
Global IP: A public IP used to gain access to the internet. At home it will most likley be a public IP NATTED* by your ISP.
Because you're also using a VPN connection, you'll receive a third IP.
Local IP for VPN: IP address used to identify yourself on the other end of the VPN.
*NAT = Network Address Translation
I'm having a static IP address, say:127.254.x.x
Is it possible to access my web application from some other place by just replacing the local host with my IP???
Also, what will I replace the local host with if Ithe server is on a wifi network.? I.e. The router assigns a different ip to my server(because of dhcp) other than my original static ip. In this case should it be
192.x.x.2:8090
Or
127.254.x.x
Any help is appreciated.
I'm having a static IP address, say:127.254.x.x Is it possible to access my web application from some other place by just replacing the local host with my IP???
Yes, provided you configure it correctly.
Normally, you have a broadband modem/router which talks to the outside world, and provides a NAT network range to your devices. So you have an external IP address (the one the modem/router uses to talk to the outside world), and probably several internal IP addresses (for your phone, your laptop, your other laptop, your Kindle, etc.).
So to access a web server on your internal network from the outside world, you have to do two things:
Configure your modem/router to "forward" traffic it receives on the desired port (port 80 for HTTP) to the server on your network. How you do this depends on your modem/router. Look for "port forwarding."
When trying to access the app from the outside world, use your external, not internal, IP address.
So for instance, if your external IP address is 222.111.222.12, and the IP address of the machine you're using as your web server is 127.154.0.23, then you tell your modem/router that whatever traffic it receives on port 80 it should forward to 127.154.0.23 (this configuration may be by IP address, or may be by the MAC address of the network card in your web server machine; it depends on the modem/router). Then to view your app from outside your network, you go to http://222.111.222.12 (or whatever name you assign that IP address to in DNS).
Is it possible to have one of our networked PC's to keep using the same IP address (192.168.1.54) so that if the master computer or a failure / shutdown etc happens then the system IP addresses are not reset so i don't have to update all the other pc's hosts files to this PC's new IP address?
You will need to make a reservation based on the MAC address of your network card. You can find this by typing "ipconfig /all" inside the command prompt.
The IP addresses can be reserved on your router or on your server depending on how they are distributed.
You should solve this in the DHCP server (typically in your router), make a reserved IP for the mac-address of the PC in question. Or you configure the PC to not use DHCP but configure a fixed IP. But that should be, if possible, an IP that is not in the DHCP range.