Default Gateway is used when the host doesn't have any route information for a particular packet. So it will ask the default gateway.
Now for a router there will be lot of static routing information, but if the router is not able to find a routing information, it should take the route mentioned in 0.0.0.0 (which is called default route). Now is this called Default Gateway of a router?
I read few documentation, but i wasn't able to find an accurate definition for Default Gateway wrt router.
It is possible to have a default gateway (typically noted as a route to 0.0.0.0) for a router. It's also known as the "default route".
A typical case for this is where a router has an upstream ISP that it's using for transit to "the rest of the Internet". In this case, the route for 0.0.0.0 would be set to the IP address of the ISP side of your link to the Internet
For example, in the most basic case on a cisco router, if your side of the ISP link is 1.1.1.1 and the "far side" of the ISP link is 1.1.1.2 you'll use something like:
ip route 0.0.0.0 0.0.0.0 1.1.1.2
...to route traffic that doesn't match any other explicit routes in the routing table, out the ISP's interface. The active connection to your ISP installs a route in your routing table, so you know how to get to 1.1.1.2. So if you're trying to get to an external address (say 10.20.30.40), your router is effectively doing two lookups: first it looks up 10.20.30.40 and sees that it should use the default route, which points to 1.1.1.2. It then sees the connected route for 1.1.1.0\30 in the routing table (which contains 1.1.1.2), and then uses that to route the packet.
The default gateway used on on most routers, for the LAN, will be the private IP of the router itself, ex:
IP Address 192.168.5.100
Subnet Mask 255.255.255.0
Gateway 192.168.5.100
Local DNS 192.168.5.100
The default gateway assigned to the WAN port will be assigned by the ISP provider, if the public interface is connected to such. If not connected, you will probably see 0.0.0.0 assigned to the Gateway and other public ip settings.
yes it has, go to command prompt, type ipconfig/all for windows and for mac https://www.expressvpn.com/support/troubleshooting/find-default-gateway/
you can see the default gateway. in accessing it on browser, type https:// and the ip of your router
It's just a simple task:
Open your network and sharing center.
Click on "change adapter setting on your top right"
Right click on the ethernet adapter
Click on properties
Choose configuration
At your right in thee dialog box, there's an option "Enable". Change it to "Disable"
All done now ... Type 192.168.1.1 in your browser
Voila... It works!
Related
I just started learning about networking and IP/MAC addresses. I understand if you want to send data to another device within the same network, you would sent out an ARP broadcast to the local network and the target device will respond with its mac address so they can start a connection.
My question is that does public IP also work the same way? Like if my home router wants to connect to the google.com IP, does it send out a ARP broadcast to the entire internet and wait for google to respond with its mac address?
Usually your gateway router will arp for the next hop router along the path to the destination, this path is often the default route (cisco calls this "the gateway of last resort"; the "default route" in cisco-ese is the default route only if routing is disable in the router which typically only happens if an image is not loaded so it is boot strapping). But sometimes your gateway will only have an out going interface, not a next hop ip address. This is fine for serial links since there can only be one next hop. But for ethernet, this causes your gateway and the next hop router to use proxy arp. There are other way to do this as well.
I am using (airtel xstream fiber) connection and trying to do port forwarding. I forwarded port 3000 of wan and direct it to my system ip address 192.168.1.2 on port 3001.
Node server is running on my system on port 3001. And I can access my hello world website locally using 192.168.1.2:3001. But when I am trying to access using public ip, it show this error code "ERR_CONNECTION_TIMED_OUT".
Also, I found my router port 3001 is open using online port checking tool/website.
So, Can anyone please tell what could be reason behind this ? Is this the problem with windows.
You first need to check what ports are open by your ISP. If your ISP is giving you a local ip at the router. Basically, creating a ppp connection. It may be using a cg nat. In that case you need to buy a static ip, without that none of the traffic will be Directed to your router. Let me know if you find something, I'm currently looking to get xstream airtel as well.
No there is no need for static IP to be access server remotely. As of now, What I see is airtel allocates new ip every 24 hr or when router got disconnected. To access your server remotely you can do two things. First one is more secured.
Change Primary IP adress of your airtel router and use Portforwarding so that its port 80 will be free for you.
Enable DMZ and point it to your local server IP. [192.168.X.X]. In this case all of your ports of the device are exposed to internet. If you want to be secure. Make sure add another router between server and airtel router and enable port forwarding.
But in this case there is a catch, When you try to access your local website using public ip (which you can see on google search) it will redirect you to airtel router panel. But when you try to access it using other device (not server otherwise server will get disconnected) connected to internet using other network(other that your current airtel router like JIO sim, Airtel Sim, etc), It will work excellently.
To get rid of dynamic ip use no-ip services. Its website will help you more. Basically, It is dynamic dns server where you will get free domain. That will get update regularly while its service running on your system. To use other dns provider service like godaddy you must need an static ip.
I am running a ddns client on Ubuntu for Nextcloud server, however my ISP has done something to the router so internet IP showing in the router is different from my public IP which causes an issue when ddclient updates the IP of my domain.
I have tried to contact my ISP but they want me to pay a huge amount for a fixed IP.
Is there any solution for this?
My router model is HG8245Q2.
*PS: The IP shown in the image is just an example.
Note: I tried this on a another router model HG8245Q, and it gives me the same IP on both router and google. so no issue on the old router model.
The IP address you see in your router is just another internal IP address from private range 10.x.x.x
This means your router is not connected directly to the internet but to another subnet of your ISP. And only this subnet is connected to the internet over another router (with NAT) and this router has a public IP address.
This is standard behavior with most of ISP because they have limited count of public IP addresses. If you need public IP, you have to pay for it, change ISP who gives you one for free or try some edge case solution like rent VPS server and make VPN tunnel to your home router (this requires advanced networking skills)
Maybe DDNS comes in handy for you. You can opt for free DDNS services like DynDDNS or NoIP.
Steps [I personally prefer noip.com ]:
Create a Free Account
Choose a hostname(We can say a domain name pointing towards ur system IP)
Download their desktop client(To sync your Dynamic IP with the hostname you selected)
Boom it's done! Use that hostname instead of IP wherever needed, traffic will be redirected to your system. Just take care of port forwarding and firewall settings.
I'm having trouble with nginx during configuration of multiple website. I'm using multiples debian VM's on Virtualbox (Windows, not a choice).
The setup I try to do is :
-One "front" VM with 2 network interfaces, one connected to the internet (NAT), and the other on a subnetwork not connected to internet (NAT network). Nginx bind on the "internet" interface.
-Two "back" VM with apache, each one with only one interface connected to the same subnetwork than the front VM.
The front VM is getting the requests from the client and proxy pass it to the right back-VM.
The problem is that on the front VM, nginx wont redirect on the right interface and try to redirect on the internet interface.
So my question is: can we specify to nginx wich interface to use to redirect the requests ?
Thank in advance for the answers
Hope we are talking about proxy_pass, not redirect.
For that issue there is no configuration parameters in nginx. If your config file is correct, then, I guess you need to setup route from your "front" machine to "back" machines and vice-versa.
First try pinging "back" machines from "front". If it does'n work, then try to add route with ip route or route.
For example, on "front" you have external interface named eth0 and internal named eth1. IP of your "back" machine is 10.0.0.2, then you should add:
ip route add 10.0.0.2/32 dev eth1
I finally found the answer myself, the trick was to use only one interface connected to the nat network and to do a port redirection from the physical interface to the VM inside the nat network.
For it, go to File->Preferences->Network, select your network, click on the screw driver , and then port redirection
I have a network like that:
Internet <-> Modem <-> Router (broadcast wifi)
I'm using Windows. If I use command: ipconfig, I only know Modem's IP through info of Default Gateway.
So, how to know the Router's IP in this network.
Thanks.
If you want to know the external (from the Internet IP) you can browse to http://www.whatismyip.com/ and check it there.
Or
You can check it inside the router's configuration page. Unfortunately you can't simply know it by being a member of its network since this is a limitation of the NAT and the IP protocol.
If you wish to know the router's IP inside the internal network of the router .
when running ipconfig it should be the Default Gateway entry.
If you know your IP and you know your Netmask, then you can easy find out the subnet. The Router's IP is "always" the first avaible IP in the subnet. Thats the case for your private IP.
For the public IP you can try a service like this one.