What is the significance of source address being 0.0.0.0

Connect and share knowledge within a single location that is structured and easy to search. I know that But what's 0. It seems it also refers to the local computer, so what's the difference? So, if your webserver machine has two IP addresses, But only to what can contact those IP addresses and the web port s.

Note that, in a different context routing 0. When a service is listening on 0. The IP address 0. From RFC , Section 3. Just that, "this host on this network" Hosting a service on 0. A datagram sent by a higher-level protocol to an address anywhere within this block loops back inside the host. This is ordinarily implemented using only As described in [RFC], Section 3. The difference between 0.

Any traffic sent to the loopback device is immediately received on it. It's not so much that the loopback network "refers" to your own host In simple terms: Listening on 0.

Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. That happens as a result more of the address mask, which selects the bits to compare. A mask of 0. So when such a route is configured, there is always somewhere for packets to go if configured with a valid destination.

But this is not guaranteed. The 0. In Internet Protocol version 4, the address 0. To give a special meaning to an otherwise invalid piece of data is an application of in-band signaling. In the context of routing, 0. The source IP address is 0.

This relay agent can either be a dedicated host Microsoft Windows Server, for example or a router a Cisco router configured with interface level IP helper statements, for example. At this time, the client has not yet received verification that it is clear to use the IP address.

This document explains how to configure a default route or gateway of last resort. These IP commands are used:. Creating a static route to the network 0. As with the ip default-network command, using the static route to 0.

However, IP routing must be enabled on the router. Note: IGRP does not understand a route to 0. Therefore, it cannot propagate default routes created using the ip route 0. Use the ip default-network command to have IGRP propagate a default route. Have something to add to the explanation? Sound off in the comments. Want to read more answers from other tech-savvy Stack Exchange users?

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Browse All Privacy and Security Articles Browse All Linux Articles Browse All Buying Guides. Best Portable Monitors. The source IP address is 0. This relay agent can either be a dedicated host for example, Microsoft Windows Server , or router for example, a Cisco router configured with interface level IP helper statements. At this time, the client has not yet received verification that it is clear to use the IP address. This document explains how to configure a default route, or gateway of last resort.

These IP commands are used:. Creating a static route to network 0. As with the ip default-network command, using the static route to 0. However, ip routing must be enabled on the router. Note: IGRP does not understand a route to 0. Therefore, it cannot propagate default routes created using the ip route 0. Use the ip default-network command to have IGRP propagate a default route.

In the Internet Protocol Version 4, the address 0. You might have mistaken 0. You can't send data to 0. You can use the joker 0. Because your socket is not a server socket, nobody can open a connection to it and the address on your side of the connection is usually not very important. The bind system call is used to choose the local address of a TCP socket. The data passed to bind is really a set of constraints: constraint on IP address, constraint on TCP port.

The usual text notation is IP:port. Logic does not dictates that it must be this way. You could extend the interface with a richer constraint language. The sentence They represent different "locations" socket addresses , inside the local "computer", inside the local IP stack actually. Remark: a computer with virtualization emulation, hardware virtualization, paravirtualization, whatever you can think of Typically you use bind-address 0.

Many servers like MySQL typically bind to The topic is already clarified in the above posts, but just to add - this 0. If you are on the client side like in a browser , it's not going to do anything when you type in a 0. From a server point of view, when you are writing some server side application and you want it to listen on say port say. Basically 0. Occasionally rarely code may need to behave differently depending on which interface the traffic came through, so one needs to watch out for that in such cases.

Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. What's the difference between Ask Question. Asked 6 years, 3 months ago. Active 8 months ago. Viewed k times. Improve this question. Sagnik Sarkar Sagnik Sarkar 3, 3 3 gold badges 9 9 silver badges 9 9 bronze badges. You may be interested in this Chrome bug tracker discussion about how to handle 0.

In most server configurations 0. This will make your server available on the internet.