Change Network of Debian

Mon, 10 Feb 2025 20:49:27 +0800

Sometimes we want to modify the default IP address and DNS server to achieve better network performance.

For Debian, modify two files: /etc/network/interfaces and /etc/resolv.conf.

Regarding interfaces:

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# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug ens18
iface ens18 inet static
address 192.168.2.35
netmask 255.255.255.0
gateway 192.168.2.60

When the gateway is 192.168.2.60;

If DNS configuration is also needed, modify /etc/resolv.conf

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nameserver 192.168.2.60

Disable IPv6

/etc/sysctl.conf

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net.ipv6.conf.all.disable_ipv6 = 1

Don’t forget to restart the network: systemctl restart networking.

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Change Network of Debian