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Update 2023-11-06 11:26:38

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c0dev0id 2023-11-06 11:26:40 +01:00
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32
src/posts/2023-11-06-OpenBSD_laptop_network_setup.pm
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@ -7,7 +7,7 @@ Note, each of the commands comes with a man page, which I encourage you to read.
List available network devices and configuration
```
ifconfig
# ifconfig
```
Typical ethernet devices are `em0`, `bge0`, `re0`. Look at the manpage of [em(4)](https://man.openbsd.org/em.4), [bge(4)](https://man.openbsd.org/bge.4) or any other device you might find to learn about what it is.
@ -15,7 +15,7 @@ Typical ethernet devices are `em0`, `bge0`, `re0`. Look at the manpage of [em(4)
You can configure these devices with
```
ifconfig <device> <option>
# ifconfig <device> <option>
```
Read [ifconfig(8)](https://man.openbsd.org/ifconfig.8) to learn about available options.
@ -23,19 +23,19 @@ Read [ifconfig(8)](https://man.openbsd.org/ifconfig.8) to learn about available
In a typical home network with dhcp, you would type something like this
```
ifconfig em0 inet autoconf
# ifconfig em0 inet autoconf
```
If you want to add IPv6 connectivity do the same with "inet6"
```
ifconfig em0 inet6 autoconf
# ifconfig em0 inet6 autoconf
```
As a last step, you need to activate the device
```
ifconfig em0 up
# ifconfig em0 up
```
## Manuel Wireless Device Setup
@ -45,21 +45,21 @@ Typical wireless devices are `run0`, `iwx0`, `iwn0`, `iwm0`. They have manpages
You connect a wireless device to your network without
```
ifconfig iwx0 nwid MyNetworkSSID wpakey MyWifiPassword
# ifconfig iwx0 nwid MyNetworkSSID wpakey MyWifiPassword
```
Once this is done, the configuration can continue like with an ethernet device
```
ifconfig iwx0 inet autoconf
ifconfig iwx0 inet6 autoconf # for IPv6
ifconfig iwx0 up
# ifconfig iwx0 inet autoconf
# ifconfig iwx0 inet6 autoconf # for IPv6
# ifconfig iwx0 up
```
To remove the IPv6 configuration from an interface, you can do
```
ifconfig iwx0 -inet6
# ifconfig iwx0 -inet6
```
Most confgurations can be removed this way.
@ -70,7 +70,7 @@ Most confgurations can be removed this way.
If you changed the `/etc/hostname.*` files, you can reconfigure the network with the netstart shell script
```
sh /etc/netstart
# sh /etc/netstart
```
Note that this script adds the confguration to devices as specified. If you remove a `/etc/hostname.*` file, netstart will not know about this device and ignore it.
@ -83,7 +83,7 @@ The concept of storing the network device setup is decribed in the manpage [host
A typical configuration for a wireless device would look like this
```
cat /etc/hostname.iwx0
# cat /etc/hostname.iwx0
join MyHomeNetworkSSID wpakey MyHomeWifiPassword
join MyWorkNetworkSSID wpakey MyWorkWifiPassword
inet autoconf
@ -98,13 +98,13 @@ Note that I added two `join` commands here instead of `nwid`. The difference is,
You can clear the join list just like you can remove any other configuration from a device.
```
ifconfig iwx0 -join
# ifconfig iwx0 -join
```
This `/etc/hostname.<device>` based configuration makes it easy to copy configuration to another device
```
cp /etc/hostname.iwx0 /etc/hostname.run0
# cp /etc/hostname.iwx0 /etc/hostname.run0
```
## Switching between Wifi and Ethernet without interrupting the connection
@ -114,7 +114,7 @@ You can create a [trunk(4)](https://man.openbsd.org/trunk.4) device, which inter
For this to work, we need three configurations and you should be able to understand most of it.
```
cat /etc/hostname.em0
# cat /etc/hostname.em0
up
cat /etc/hostname.iwx0
@ -122,7 +122,7 @@ join MyHomeNetworkSSID wpakey MyHomeWifiPassword
join MyWorkNetworkSSID wpakey MyWorkWifiPassword
up
cat /etc/hostname.trunk0
# cat /etc/hostname.trunk0
trunkproto failover
trunkport em0
trunkport iwx0