commit 274032a0138e029e643abfbff034cd1769691c32
parent 2e14a7e807b1d2b4488bd1fee09507821f35aa3c
Author: pyratebeard <root@pyratebeard.net>
Date: Sun, 5 Feb 2023 16:19:29 +0000
masq_of_the_dhcphantasm
Diffstat:
1 file changed, 31 insertions(+), 5 deletions(-)
diff --git a/entry/masq_of_the_dhcphantasm.md b/entry/masq_of_the_dhcphantasm.md
@@ -1,13 +1,39 @@
-The other day I wanted to test a new network device without connecting it to my home LAN. I knew the device was preconfigured to use DHCP so I very quickly set up one of my laptops as a DHCP server using [dnsmasq](https://dnsmasq.org/){target="_blank" rel="noreferrer"}, plugged the laptop and the device into a switch, and could test the device 'offline'.
+The other day I wanted to test a new network device without connecting it to my home LAN. I knew the device was preconfigured to use DHCP so I very quickly set up one of my laptops as a DHCP server using [dnsmasq](https://dnsmasq.org/){target="_blank" rel="noreferrer"}.
-To setup the DHCP server I made sure the `dnsmasq` package was installed on one of my laptops then disconnected it from the WiFi.
+After making sure the `dnsmasq` package was installed on the laptop I disconnected it from the WiFi and plugged it into a switch.
-The configuration file is usually /etc/dnsmasq.conf, or you can drop your own config files into /etc/dnsmasq.d/ (ensure you uncomment the include line in /etc/dnsmasq.conf).
+Configuring a static IP differs from system to system, but in this case I was using `netctl`. I took a copy of the example configuration file, /etc/netctl/examples/ethernet-static, put it into the /etc/netctl directory, and changed the 'Interface' and 'Address' variables
+```
+Description='A basic static ethernet connection'
+Interface=enp0s25
+Connection=ethernet
+IP=static
+Address=('192.168.1.1/24')
+#Routes=('192.168.0.0/24 via 192.168.1.2')
+Gateway='192.168.1.1'
+DNS=('192.168.1.1')
+
+## For IPv6 autoconfiguration
+#IP6=stateless
+
+## For IPv6 static address configuration
+#IP6=static
+#Address6=('1234:5678:9abc:def::1/64' '1234:3456::123/96')
+#Routes6=('abcd::1234')
+#Gateway6='1234:0:123::abcd'
+```
+
+Bringing the interface up with
+```
+sudo netctl start ethernet-static
+```
+
+The dnsmasq configuration file is usually /etc/dnsmasq.conf, or you can drop your own config files into /etc/dnsmasq.d/ (ensure you uncomment the include line in /etc/dnsmasq.conf).
My setup was very simple
```
# specify ethernet device to operate on
-interface=enp5s0
+interface=enp0s25
# disable dns
port=0
@@ -16,7 +42,7 @@ port=0
dhcp-range=192.168.1.10,192.168.1.12,8h
```
-To validate any configuration incant
+Before starting `dnsmasq` it is a good idea to validate the configuration
```
dnsmasq --test
```
