I got a strange problem with my isc-dhcpserver (Ubuntu 16.04).
When clients are requesting from the server, I can see the following output in /var/log/syslog :
Jun 21 21:41:25 drake dhcpd[265]: DHCPREQUEST for 192.168.0.113 (192.168.0.254) from ea:25:63:d9:6c:10 (webdev) via eth1
Jun 21 21:41:25 drake dhcpd[265]: DHCPACK on 192.168.0.113 to ea:25:63:d9:6c:10 (webdev) via eth1
/var/lib/dhcp/dhcpd.leases looks like this for this lease:
lease 192.168.0.113 {
starts 3 2017/06/21 19:41:25;
ends 4 2017/06/22 01:41:25;
cltt 3 2017/06/21 19:41:25;
binding state active;
next binding state free;
rewind binding state free;
hardware ethernet ea:25:63:d9:6c:10;
client-hostname "webdev";
Now let's modify this to be static DHCP:
/etc/dhcp/dhcpd.conf:
host webdev {
hardware ethernet ea:25:63:d9:6c:10;
fixed-address 192.168.0.220;
}
Output from /var/log/syslog with missing client-hostname:
Jun 21 22:37:37 drake dhcpd[1627]: DHCPDISCOVER from ea:25:63:d9:6c:10 via eth1
Jun 21 22:37:37 drake dhcpd[1627]: DHCPOFFER on 192.168.0.220 to ea:25:63:d9:6c:10 via eth1
Jun 21 22:37:37 drake dhcpd[1627]: DHCPREQUEST for 192.168.0.220 (192.168.0.254) from ea:25:63:d9:6c:10 via eth1
Jun 21 22:37:37 drake dhcpd[1627]: DHCPACK on 192.168.0.220 to ea:25:63:d9:6c:10 via eth1
Is there any way to make the dhcp-server show the client-hostname in the logfile even if the mac-address is linked to a static IP?
I really think I have done this before…
As far as I can remember, this worked fine on my old Slackware-server back in the days.
The server running isc-dhcpserver is running Ubuntu server 16.04 with the latest updates applied.
Best Answer
Try to use log function. I found example at ISC mailing lists: Static clients: how log hostnames and create lease entries? Add to global section of dhcpd config file:
But dhcp-client must send in DHCPREQUEST or DHCPDISCOVER its client-hostname as option 12. Not all dhcp-clients do it by default.