MongoError: failed to connect to server [localhost:27017] on first connect

Update 2020 Feb 24: It would be wise to stay tuned with it. Here is the link for latest library instruction: https://docs.mongodb.com/manual/administration/install-community/ You haven’t started your monogo database. first install mongo install mongo as per your OS https://docs.mongodb.com/v3.0/tutorial/ then follow instructions mentioned on this site: https://docs.mongodb.com/v3.0/tutorial/getting-started-with-the-mongo-shell/ cd . mongod –dbpath “any directory path to start your database … Read more

Origin null is not allowed by Access-Control-Allow-Origin

Origin null is the local file system, so that suggests that you’re loading the HTML page that does the load call via a file:/// URL (e.g., just double-clicking it in a local file browser or similar). Most browsers apply the Same Origin Policy to local files by disallowing even loading files from the same directory as the document. (It used to be that … Read more

How do I kill the process currently using a port on localhost in Windows?

Step 1: Open up cmd.exe (note: you may need to run it as an administrator, but this isn’t always necessary), then run the below command: netstat -ano | findstr :<PORT> (Replace <PORT> with the port number you want, but keep the colon) The area circled in red shows the PID (process identifier). Locate the PID of the process that’s … Read more

Bad Request- Invalid Hostname while connect to localhost via wifi from mobile phone

Step 1: Add Inbound Rule of Windows Firewall Open the Windows Firewall with Advanced Security. At the left panel, right click on Inbound Rule > New Rule Rule Type: PortProtocol and Ports: TCPSpecific local ports: 57976Action: Allow the connectionProfile: Tick all (Domain, Private, Public)Name: Name, Description(optional) Finish. Step 2: IIS or IIS Express Add Bindings of IIS Manager Open … Read more

What is IPV6 for localhost and 0.0.0.0?

As we all know that IPv4 address for localhost is 127.0.0.1 (loopback address). Actually, any IPv4 address in 127.0.0.0/8 is a loopback address. In IPv6, the direct analog of the loopback range is ::1/128. So ::1 (long form 0:0:0:0:0:0:0:1) is the one and only IPv6 loopback address. While the hostname localhost will normally resolve to 127.0.0.1 or ::1, I have seen cases where someone has bound it to an IP … Read more

localhost/xampp/ or http://localhost/index.php can’t be accessed

I am learning server and sql. So I need to install xampp. But unfortunately my localhost/index.php and localhost/xampp not working. I read many questions here stackoverflow but none solved my problem. Here is my httpd-xampp.conf file: This is what I got when I tried to access localhost/xampp/ and localhost/index.php The image is here: Please suggest … Read more

What’s the whole point of “localhost”, hosts and ports at all?

In computer networking, localhost (meaning “this computer”) is the standard hostname given to the address of the loopback network interface. Localhost always translates to the loopback IP address 127.0.0.1 in IPv4. It is also used instead of the hostname of a computer. For example, directing a web browser installed on a system running an HTTP … Read more

Localhost is not working

If you have defined Virtual Hosts, and thats a very good idea, then you need to define the vhosts name in the HOSTS file. For example, the hosts file: Otherwise windows has no way of knowing where to look for them. Another possibility for localhost not working is a corrupted HOSTS file. Try deleting it … Read more