The default gateway is a network term used to specify a special host that is used to access other networks. The default gateway is also called a default route. One of the other popular use cases for default gateway is using to access the internet.
Default Gateway IP Address
Network administrators manages the default gateway IP address and they generally uses the first or last usable IP address in the network. Let’s look network 10.0.0./24 . This network range is from IP address 10.0.0.1 to 10.0.0.254 . The popular use case is using 10.0.0.1 as default gateway IP address.
List Windows Default Gateway
In windows operating systems we can use ifconfig command in order to find detailed information about the network stack and protocols. Detailed tutorial about ifconfig can be reached from following link.
Windows Ipconfig Command Tutorial With Examples To List, Change, Renew IP Configuration
We can also use route print command to print default gateway.
> route print
As we can see from the screenshot the network destination address 0.0.0.0 specifies the default gateway line. If we look to the Gateway column we will see 192.168.122.1 which is the default gateway of the windows system.
List Linux Default Gateway
Linux distributions like Ubuntu, CentOS, RedHat use ip command to get detailed information about network and protocols. Look following tutorial for detailed information.
Linux Ip Command With Examples- Network Management
We will use ip route command which will print all routes by starting from default route or default gateway.
$ ip route
Here default gateway line starts with default via keywords which means all networks those do not exists in the current route table.
Modems and Routers Default Routes
The home internet users generally connect to the internet with modems or router. These routers generally use 192.168.0.0/16 network or more specifically 192.168.0.0/24 network. The default gateway will be 192.168.0.1 or 192.168.1.1 in most of the situations.