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Can a Linux system have more than one default gateway?
Normally, a Linux system only has one routing table, in which only one default gateway can make entries. With iproute2, you have the ability to setup an additional routing table, for one thing, and allow this table to be used by the system based on rules, for another.
How to configure 2 NICs with 2 gateways?
Lets say my router has a LAN (192.168.0.1/24) and a DMZ (192.168.1.1/24). My computer has 2 NICs, one for LAN and one for DMZ. How can I configure my routes so that it uses both gateways instead of a default one?
Can you use ifconfig and route with two gateways?
This is somewhat non-obvious and will make your system more difficult to troubleshoot, especially if someone comes along who doesn’t know about policy routing and doesn’t use the iproute2 tools. You won’t be able to use the “legacy” network tools like ifconfig and route anymore. Thanks for your reply.
How to create two default gateways in Debian?
We will assume that we have two interfaces: eth0 and eth1. The two networks that should be used are 192.168.0.0/24 and 10.10.0.0/24, whereby the first IP address in each respective network should be the gateway. Under Debian, the initial configuration would appear as follows. /etc/network/interfaces
How to use two gateways in one network?
The two networks that should be used are 192.168.0.0/24 and 10.10.0.0/24, whereby the first IP address in each respective network should be the gateway. Under Debian, the initial configuration would appear as follows. /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them.
Is it possible to set up multiple NICs in Linux?
With one single NIC, the default Linux installation will automatically set it up as a static or dynamic IP address, and a default gateway. When there are multiple NICs, gateway routing becomes an issue.
Which is the default gateway for two computers?
Example: You have a computer sitting between two networks, like this: 192.168.1.5/24 and 192.168.2.5/24 You use 192.168.1.1 as Default Gateway – that is the default route for anything not locally attached.
How to view the routing table in Linux?
You can view your current main routing table with either of the following 3 commands: The first column in the output of the three commands indicates the target network. The output of ip route show (following the keyword dev) also presents the network devices that serve as physical gateway to those networks.
How to add a new routing table to iproute2?
To add a new routing table, the file, /etc/iproute2/rt_tables must be edited. We will call the routing table “rt2” and set its preference to 1. The named file should then appear as follows. From this point, four commands are needed to achieve our goal. First, the new routing table needs to be populated, which is done using the following command.