Hi all,

I'm trying to set up an external facing master/slave DNS Bind9 2 server config. (on eth0 with static IP, obviously) on Debian Etch, with an internal DHCP/PXE/TFTP (and eventually LDAP domain authentication) server master/slave serving up DHCP on eth1, but I keep getting:

Oct 11 06:36:37 ns1 dhcpd: No subnet declaration for eth0 (172.16.0.170).
Oct 11 06:36:37 ns1 dhcpd: ** Ignoring requests on eth0. If this is not what
Oct 11 06:36:37 ns1 dhcpd: you want, please write a subnet declaration
Oct 11 06:36:37 ns1 dhcpd: in your dhcpd.conf file for the network segment
Oct 11 06:36:37 ns1 dhcpd: to which interface eth0 is attached. **

my /etc/dhcp3/dhcp.conf looks like this:

DHCPDARGS=eth1;
option domain-name "domain.com";
option domain-name-servers 172.16.0.170, 172.16.0.180;
default-lease-time 600;
max-lease-time 7200;
one-lease-per-client on;
log-facility local7;
failover peer "dhcp" {
primary;
address 172.16.0.170;
port 519;
peer address 172.16.0.180;
peer port 520;
max-response-delay 60;
max-unacked-updates 10;
mclt 600;
split 128;
load balance max seconds 3;
}
include "/etc/dhcp3/rndc.key";
zone domain.com. {
primary 172.16.0.170;
key rndc-key;
}
zone reversedpublicip.in-addr.arpa. {
primary 172.16.0.170;
key rndc-key;
}
subnet 172.20.0.0 netmask 255.255.255.0 {
pool {
failover peer "dhcp";
range 172.20.0.10 172.20.0.254;
deny dynamic bootp clients;
allow unknown-clients;
}

Thanks for the help,

Depends on the distribution but look in the init script for an interfaces specification; for example, in Debian it's:

INTERFACES="eth0"

# Reads config file (will override defaults above)
[ -r /etc/default/dhcp ] && . /etc/default/dhcp

DHCPDPID=/var/run/dhcpd.pid

case "$1" in
start)
echo -n "Starting DHCP server: "
start-stop-daemon --start --quiet --pidfile $DHCPDPID \
--exec /usr/sbin/dhcpd -- -q $INTERFACES

........................
RH-ish distributions might have an interface specification somewhere in /etc/sysconfig

Worse comes to worse you could simply specify it in the init script but of course I'd avoid hard-coding anything if possible.