In some cases you would like to have one IP for computer no matter how it's connected - using Ethernet or WiFi.
My reason was BackupPC - it uses names to distinguish hosts. Unfortunately Web interface in my router only allows 1-to-1 association between MAC, IP and host name (using /etc/ethers and /etc/hosts files), so I have two positions:
| Hostname | MAC | IP |
| mylaptop | 00:00:00:23:B2:25 | 192.168.1.10 |
| mylaptop-lan | 00:00:00:80:B2:0A | 192.168.1.11 |
To bypass this restriction I have to do it manually.
First of all I had to remove both MAC form web interface so they don't disturb my own configuration (You can check if the IP is gone in /etc/ethers or /etc/hosts file).
I've decided to create separate file for my changes so I've created empty /etc/dnsmasq-jaqb.conf and added at the end of /etc/dnsmasq.conf:
conf-file=/etc/dnsmasq-jaqb.conf
(to be honest I've this file for my previous changes ;-)
Then I've added name-to-ip association to /etc/dnsmasq-jaqb.conf
dhcp-host=mylaptop,192.168.1.10,24h cname=mylaptop-lan,mylaptop
Now, after restart dnsmasq of course, my computer always get the same IP.
The last line is not necessary - it is to help some of my scripts to work because they assume there is host named mylaptop-lan.
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