Is there a way to refuse a dhcp response from a specific ip?
On my network I have two dhcp servers (not my fault). Is there a way to refuse a dhcp response coming from a specific dhcp server?
According to the dhclient.conf
manpage, it should be possible to do what you want by adding a reject
directive to the /etc/dhcp/dhclient.conf
file
reject cidr-ip-address [, ... cidr-ip-address ] ;
The reject statement causes the DHCP client to reject offers from
servers whose server identifier matches any of the specified hosts or
subnets. This can be used to avoid being configured by rogue or mis‐
configured dhcp servers, although it should be a last resort - better
to track down the bad DHCP server and fix it.
.
.
.
reject 192.168.0.0/16, 10.0.0.5;
The above example would cause offers from any server identifier in the entire
RFC 1918 "Class C" network 192.168.0.0/16, or the specific single address
10.0.0.5, to be rejected.
Note the comment in the manpage though - better to track down the bad DHCP server and fix it.