CentOS

It just posts to the messages file every second over and over.

dhcpd: DHCPDDISCOVER from 00:25:90 via eth0 network 0.0.0.0/0: no free leases

Is there a way to add a new lease?

The dhcpd.leases file is:

server-duid "key numbers";

The DHCPD.conf file has:

subnet 0.0.0.0 netmask 0.0.0.0 {
authoritative;
default-lease-time 21600000;
max-lease-time 432000000;
}
ddns-update-style ad-hoc;

You problem is probably here:

"subnet 0.0.0.0 netmask 0.0.0.0"

Assign it a subnet, it really wants one!

Thanks, I still get the error but I was told it's o.k. and just a report. Everything is working.

Is there a way to disable reporting this error? To turn off reports for DHCPDISCOVER?

dwhs wrote: ↑

2018/12/06 18:32:36

Thanks, I still get the error but I was told it's o.k. and just a report. Everything is working.

Is there a way to disable reporting this error? To turn off reports for DHCPDISCOVER?

Yes, fix your dhcpd configuration. You should not be getting that report. It's not OK.

No expert by any means, but:

You've already expended multiple times the effort it would have taken just to fix it. DHCP is asking you for the info it needs to create & assign addresses that fit your network. (i.e. tell it how you're building your network!)

Very basic example, my network machines used to be addressed in the 192.168.2.{nn} range ({nn} being the machine assignment on that network), so my declaration in the .conf file would look like:

subnet 192.168.2.0 netmask 255.255.255.0

If you're addressing your machines with addresses like 10.0.2.{nn}, yours might then be

subnet 10.0.2.0 netmask 255.255.255.0

or for 192.168.138.{nn} machines

subnet 192.168.138.0 netmask 255.255.255.0

As mentioned, this was just a simple example so that your DHCP will know how to address network machines that plug-in to it. I am left to wonder, given your settings, how your DHCP is working ... or maybe you're assigning fixed addresses, our your router is also running DHCP. In any case, this is a snowball that is building at the top of the hill - eventually, you'll be bumping into this (and much more) again as you progress if you just let it go. <wink>