remove ip address from remote host

hedron · 04-16-2010, 01:15 AM

If I have a dnsmasq server and it dished out a IP address that I don't want it to and it still gives it to my machine no matter how many times I restart windows and issue ipconfig /renew|release or enable/disable the adapter, how do I force it to give my windows machine an IP I want it to have?

I hope that made sense... The only way I've accomplished this in the past is by rebooting my slackware system.

Sayan Acharjee · 04-16-2010, 01:22 AM

Quote:

Originally Posted by hedron

If I have a dnsmasq server and it dished out a IP address that I don't want it to and it still gives it to my machine no matter how many times I restart windows and issue ipconfig /renew|release or enable/disable the adapter, how do I force it to give my windows machine an IP I want it to have?

I hope that made sense... The only way I've accomplished this in the past is by rebooting my slackware system.

You can bind your system's physical address to a specific ip address, so that whenever the DHCP server is requested to provide ip, it will give the same ip to that machine.
You can configure it in your dhcp server.

hedron · 04-16-2010, 01:39 AM

I use dhcp-host option in dnsmasq.conf and it normally works. But sometimes Windows screws up and messes up the cache or something and locks out the IP address somehow.

OK, It says this in syslog:

Code:

not giving name <windows host name> to the DHCP lease of 192.168.1.100 because the name exists in /etc/hosts with address 192.168.1.1

Sayan Acharjee · 04-16-2010, 01:42 AM

Quote:

Originally Posted by hedron

I use dhcp-host option in dnsmasq.conf and it normally works. But sometimes Windows screws up and messes up the cache or something and locks out the IP address somehow.

OK, It says this in syslog:

Code:

not giving name <windows host name> to the DHCP lease of 192.168.1.100 because the name exists in /etc/hosts with address 192.168.1.1

Can you post your /etc/hosts file here?

hedron · 04-18-2010, 06:20 AM

Code:

127.0.0.1               localhost
#127.0.0.1              luskan.faerun.ao luskan
#
192.168.1.1   luskan.faerun.ao        luskan
192.168.1.2   baldursgate.faerun.ao   baldursgate
192.168.1.3   neverwinter.faerun.ao   neverwinter
192.168.1.4   annanarissa.faerun.ao   annanarissa

fancylad · 04-18-2010, 09:49 AM

I think you answered your own question:

Quote:

192.168.1.1 luskan.faerun.ao luskan

Is the windows host name luskan? If so then it is already defined in /etc/hosts as the message in syslog indicates.

hedron · 04-18-2010, 09:59 AM

Oh... so like, then I should remove all the entries from my hosts file?

Wait... I never told it to give my Windows machine that address, it's just randomly giving it.

Ok, now it gave me a different IP after I disabled the network device and added the gateway IP to the network properties in Windows. But it's not the IP in dnsmasq.conf or /etc/hosts.

fancylad · 04-18-2010, 05:07 PM

what is the hostname assigned to the windows machine? if it is luskan then the problem is that hostname is already mapped to an ip in /etc/hosts. you can't have two machines in a lan with the same hostname. i mean you could but what's the point?

hedron · 04-19-2010, 02:57 AM

My slackware box is luskan and my windows machine is neverwinter. I didn't assign it the same IP address. It's like dnsmasq still thinks that someone has my windows machines IP address, so it gives it a different one. I have set the IP manually in Windows because my windows box needs a specific IP address for certain apps I use, but I'd rather have dnsmasq give me the correct one. I know I could just restart linux and everything will go back to normal, but I don't want to close this app I have running on it.

fancylad · 04-19-2010, 02:11 PM

So are you configuring staic dhcp addresses with dnsmasq? What I mean by that is do you have a mapping from mac address to ip address somewhere configured with dnsmasq so it knows to give a particular ip to particular device with that mac?

hedron · 04-19-2010, 11:55 PM

That is correct. I've used numerous guides and it's been working fine, but this is the only issue that I've had so far. I use dhcp-host.