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Configure network interfaces on OpenBSD

Last updated: Oct 6, 2023

Intro

Configuration

OS: OpenBSD 7.3

Installing

Get interface name:

openbsd# ifconfig

we need to create a /etc/hostname."interface_name" file for each interface, contening this information:

address_family address netmask broadcast [other options]

Settings

dhcp: put the interface in dhcp mode
address_family: inet for IPv4
address: ip address
netmask: network mask
NONE: No broadcast address

Examples

Set gateway:

# echo "192.168.1.1" > /etc/mygate

Set em0 interface in dhcp:

# echo "dhcp" > /etc/hostname.em0

Set em1 interface in static:

inet 192.168.1.2 255.255.255.0 NONE

Set a vlan10 interface on em1 interface:

inet 172.21.0.31 255.255.255.0 NONE vlan 10 vlandev em1

Set DNS:

echo "nameserver 192.168.1.254" > /etc/resolv.conf

To take this changes into consideration we need to execute:

# sh /etc/netstart

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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