Just installed another laptop with centos 6, built FR from git and i got same result.. It makes me wonder if i have my configuration correctly set, if anyone can confirm, here are my steps: - I did clean install of centos 6, installed required packages and built and installed freeradius from git - set IP on FR machine on eth0 to 192.168.10.1 with netmask 255.255.255.0 - cleared iptables and disabled selinux - added mac2ip to mods-enabled - created folder mods-config/passwd/ and edited file mac2ip with this content: 00:30:48:32:d7:5f,192.168.10.102 (this is the mac of ubuntu machine which is waiting for dhcp IP) - created file dhcp-static under sites-enabled with this content: server dhcp { listen { type = dhcp ipaddr = 255.255.255.255 port = 67 interface = eth0 broadcast = yes } dhcp DHCP-Discover { update reply { DHCP-Message-Type = DHCP-Offer } update reply { DHCP-Domain-Name-Server = 0.0.0.0 DHCP-IP-Address-Lease-Time = 7200 DHCP-DHCP-Server-Identifier = 192.168.10.1 } mac2ip ok } dhcp DHCP-Request { update reply { DHCP-Message-Type = DHCP-Ack } update reply { DHCP-Domain-Name-Server = 0.0.0.0 DHCP-IP-Address-Lease-Time = 7200 DHCP-DHCP-Server-Identifier = 192.168.10.1 } mac2ip ok } dhcp { reject } } started the server with radiusd -X and received dhcp requests, but no respose was gathered.