What is proxy keep alive in Apache?

Is proxy keep alive mechanism is like that: http connection will be maintained after browser closing the connection to Apache.

That means apache will continue working of request for request instead of ending request and disconnecting browser. How it will work exactly? Also can proxy keep alive mechanism be helpful for a request which has been sent to server side (Apache or any other server side) in previous instance?

Yes, the connection is maintain after the client has left, however the Apache process still holds onto the connection. This means if there's anything left open on the client side that isn't the browser (for example, if the user is sending an email with a SMTP server to send emails, there would still be something active on the server, even though no longer visible as an open browser window), the server will have the ability to still deliver messages to that SMTP server even after the Apache server has been shutdown and restarted. However the other way, if there is nothing but the client still actively sending requests to the Apache server, then the client will close the connection and the connection is dropped, thus dropping the connection.

Keep Alive Mechanism. One purpose of keeping a connection from the server during this time is simply that if the client does shut down the connection after the browser loads Apache's webpage (after all, nothing needs the connection now that the page is loaded). However, this feature is not very well supported in most browsers, but I believe newer browsers do support it. Even without using the proxy feature (not sure if the connection is even maintained, though,) there are ways to do this to an extent.

Can you use Apache as a reverse proxy?

I'm very inexperienced with this area but need to be able to do this.

I am doing some work on my local machine and will need apache access a site on the internet (). The machine is behind a router and firewall but I don't have a static IP address. I am using a dynamic DNS service that redirects me to the website. This redirect works fine. I now have two Apache servers and each has a different www.mysite.com.

I want to be able to do this: My clients have their own dynamic DNS and use www.com they point it at apache2 but apache 2 doesn't know what to do. I don't know if Apache2 even can act as a reverse proxy. Is there a tutorial or instructions that show this? Would I have to write one myself?
Apache cannot really be a "reverse-proxy server" because your webserver itself cannot redirect its traffic. Apache's job is to serve HTTP requests, not anything else. What you might be able to do is use your webserver (eg, Apache) to serve the web files (HTML/CSS/JS etc.) of a completely unrelated site (eg, e-commerce or some other similar service). For that, both sites have to be configured to accept a valid SSL connection.

Your example would then look like this: / For example, www.com is at 127.0.1:8080.

What is the host header in reverse proxy?

I am trying to understand how a reverse proxy works.

How does a website like GitHub works if you add a host header on your call to the REST API to forward from their domain, for example github.com.

Is that somehow related to the host header? Can anyone explain? In http protocol, what is the host header? A Host: header will be used as HTTP request, but that's optional. From: The Host: header field in an HTTP request is used to supply a. meaningful domain name to identify the protocol, location, and/or. services used by the request. But for every request a HOST header is sent in every request which includes. the full domain name from which it was sent, as well as user info and. even cookies to be used. In HTTP/2 this is optional and when omitted all the cookies for a given host would be forwarded. From. The HTTP Host header is used by some web servers to help the client choose a. server to connect to. Some firewalls and load balancers will replace the Host header with their own value which can sometimes cause confusing issues for the client. They do this because they don't want to forward cookies to a web server using different protocols/ports than the one that the webserver normally. uses, as these other protocols can use different mechanisms to authenticate or keep authentication. details. Sometimes, users can be tricked into connecting to malicious sites because of the change of hostname.

What is host header in Apache?

In Apache2, host headers are sent when the client sends a request to a server that doesn't match the current server's IP address.

HTTP/1.1 From HTTP/1.1 Introduction: A Host request-line is always followed by a blank line. The Host header field value is then given by the Host request-header field value, followed by an optional FWS (Fully-qualified Domain Name) and a comma, then an IP address, and a final FWS. The Host request-header field value also can include a port, just as for an HTTP request.

HTTP/1.0 The Host field, in HTTP/1.0, is described in RFC7230, which says: The Host request-header field allows the sender to specify its. intended recipients. This can be useful when a sender wishes to send an HTTP message to multiple recipients, and therefore must identify. each intended recipient independently. I think this covers it.