DNS resolve for hostnames in a network

[1veedo]

I have names for my computers but whenever I ssh I always have to use the full IP address. If I try to run say

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ssh tux

I get an error,

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ssh: Could not resolve hostname tux: Name or service not known

I know of a couple solutions to this and they mostly involve static IP addresses and modifying your hosts file which would be great if I was always on the same network but I don't want to have to set up different host files for every network I join, I just want it to be dynamic.

Usually routers have dns servers so I tried adding my router to /etc/resolv.conf but it didn't seem to do anything. Is there like a refresh you have to do when you modify that file (init 2 / init 5?) or am I simply doing it wrong?

[NeddySeagoon]

1veedo,


You need the sendhost option in your /etc/conf.d/net file for dhcp.

For baselayout2/openrc the net.example flle says

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# GENERIC DHCP OPTIONS
# Set generic DHCP options like so
#dhcp_eth0="release nodns nontp nonis nogateway nosendhost"

# This tells the dhcp client to release its lease when it stops, not to
# overwrite dns, ntp and nis settings, not to set a default route and not to
# send the current hostname to the dhcp server and when it starts.
# You can use any combination of the above options - the default is not to
# use any of them.

The baselayout1 syntax is slightly different. This allows the dhcp server to associate the host name with the IP address it just gave you.

[1veedo]

So I need something like

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dhcp_eth0="sendhost"

?

[NeddySeagoon]

1veedo,

Try it. I can't test as my home network is all static and I use /etc/hosts

[floppymaster]

This will only work if your router's dhcp server is actually configured to update the dns server. I have never used an off-the-shelf router, so I'm not certain this is enabled by default on most models.

In my network, I have a Linux box (Ubuntu LTS) doing my routing, dns, and dhcp. I had to configure dhcpd to send dns updates, and bind to receive them.

[magic919]

I run dnsmasq on my networks to allow this kind of thing. It provides the much needed link between DHCP and DNS functions.

[platojones]

I run dnsmasq on my networks to allow this kind of thing. It provides the much needed link between DHCP and DNS functions.

Thank you! I was looking for exactly that application for the past couple of weeks. I didn't want a full scale BIND install for my simple home network and personal VPN for my android phone. I hate typing in IP addresses from on my phone though. Solved my problem in 5 minutes. Awesome application. I just installed it, with no configuration and it works perfectly.