DHCP 셋팅시 오류 로그 좀 봐주세요

========== dhcpd.conf 셋팅 =========================
default-lease-time 86400;
max-lease-time 259200;
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.1.255;
option routers 192.168.1.1;
option domain-name-servers 192.168.1.1;

subnet 192.168.1.0 netmask 255.255.255.0{
range 192.168.1.11 192.168.1.20;
}
===================================================

========== /var/log/syslog =========================
Jul 15 22:48:08 localhost dhcpd: unable to create icmp socket: Operation not permitted
Jul 15 22:48:08 localhost dhcpd: Can't open /var/lib/dhcp3/dhcpd.leases for append.
===================================================

위와 같은 문제가 발생하면 DHCP 서버가 동작하지 않습니다.

답변 부탁드립니다.