dhcpd suddenly stopped working

[sweatje]

I have a gentoo box I have been running as a firewall for several months. Last night, the dhcpd suddenly stopped providing addresses. This was very confusing because it has been working for a long time and there were no other changes taking place to configurations or software on this system.

I am using the latest dpcp

* net-misc/dhcp
Latest version available: 3.0.1-r1
Latest version installed: 3.0.1-r1

If have two NICs in the server, and I am binding dhcp to the internal network - eth1:

# ifconfig
eth0 Link encap:Ethernet HWaddr 00:C0:4F:70:40:D7
inet addr:192.168.15.2 Bcast:192.168.15.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:42488 errors:0 dropped:0 overruns:0 frame:0
TX packets:38755 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:26240089 (25.0 Mb) TX bytes:17762260 (16.9 Mb)
Interrupt:11 Base address:0xd880

eth1 Link encap:Ethernet HWaddr 00:50:BA:C4:33:35
inet addr:192.168.10.1 Bcast:192.168.10.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:55923 errors:0 dropped:0 overruns:0 frame:0
TX packets:54941 errors:0 dropped:0 overruns:0 carrier:0
collisions:2947 txqueuelen:1000
RX bytes:19799165 (18.8 Mb) TX bytes:27370143 (26.1 Mb)
Interrupt:10 Base address:0xe400

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:9408 errors:0 dropped:0 overruns:0 frame:0
TX packets:9408 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:393528 (384.3 Kb) TX bytes:393528 (384.3 Kb)

# cat /etc/conf.d/dhcp
IFACE="eth1"
DHCPD_OPTS="-q"
CHROOT="/chroot/dhcp"
export LD_PRELOAD="/usr/lib/libresolv.so /usr/lib/libnss_dns.so"

My configuration is pretty simple as well:

# cat /chroot/dhcp/etc/dhcp/dhcpd.conf | grep -v '^#'

option domain-name "casey-sweat.us";
option domain-name-servers 192.168.10.1;

default-lease-time 600;
max-lease-time 7200;

authoritative;

log-facility local7;

ddns-update-style ad-hoc;


subnet 192.168.10.0 netmask 255.255.255.0 {
range 192.168.10.110 192.168.10.150;
option routers 192.168.10.1;
}


subnet 192.168.15.0 netmask 255.255.255.0 {
}


The leases file looks like this:

# cat /chroot/dhcp/var/lib/dhcp/dhcpd.leases
# All times in this file are in UTC (GMT), not your local timezone. This is
# not a bug, so please don't ask about it. There is no portable way to
# store leases in the local timezone, so please don't request this as a
# feature. If this is inconvenient or confusing to you, we sincerely
# apologize. Seriously, though - don't ask.
# The format of this file is documented in the dhcpd.leases(5) manual page.
# This lease file was written by isc-dhcp-V3.0.1

lease 192.168.10.147 {
starts 1 2005/12/05 01:00:40;
ends 1 2005/12/05 01:10:40;
tstp 1 2005/12/05 01:10:40;
binding state free;
hardware ethernet 00:10:83:02:96:2f;
uid "\001\000\020\203\002\226/";
}
lease 192.168.10.146 {
starts 3 2005/12/07 04:24:53;
ends 3 2005/12/07 04:34:53;
tstp 3 2005/12/07 04:34:53;
binding state free;
hardware ethernet 00:0d:60:af:0f:24;
uid "\001\000\015`\257\017$";
}
lease 192.168.10.150 {
starts 3 2005/12/07 13:43:42;
ends 3 2005/12/07 13:45:42;
tstp 3 2005/12/07 13:45:42;
binding state free;
hardware ethernet 00:40:05:de:2a:f6;
}
lease 192.168.10.148 {
starts 3 2005/12/07 13:44:42;
ends 3 2005/12/07 13:54:42;
tstp 3 2005/12/07 13:54:42;
binding state free;
hardware ethernet 00:09:5b:3e:ae:e5;
uid "\001\000\011[>\256\345";
}
lease 192.168.10.149 {
starts 3 2005/12/07 14:39:02;
ends 3 2005/12/07 14:49:02;
tstp 3 2005/12/07 14:49:02;
binding state free;
hardware ethernet 00:02:8a:ea:24:ce;
uid "\001\000\002\212\352$\316";
}
lease 192.168.10.149 {
starts 3 2005/12/07 15:07:53;
ends 3 2005/12/07 15:17:53;
binding state active;
next binding state free;
hardware ethernet 00:02:8a:ea:24:ce;
uid "\001\000\002\212\352$\316";
client-hostname "DPW-60AF0F24";
}
lease 192.168.10.149 {
starts 3 2005/12/07 15:07:53;
ends 3 2005/12/07 15:17:53;
tstp 3 2005/12/07 15:17:53;
binding state free;
hardware ethernet 00:02:8a:ea:24:ce;
uid "\001\000\002\212\352$\316";
}
lease 192.168.10.149 {
starts 3 2005/12/07 15:24:16;
ends 3 2005/12/07 15:34:16;
binding state active;
next binding state free;
hardware ethernet 00:02:8a:ea:24:ce;
uid "\001\000\002\212\352$\316";
client-hostname "DPW-60AF0F24";
}
lease 192.168.10.149 {
starts 3 2005/12/07 15:24:17;
ends 3 2005/12/07 15:34:17;
binding state active;
next binding state free;
hardware ethernet 00:02:8a:ea:24:ce;
uid "\001\000\002\212\352$\316";
client-hostname "DPW-60AF0F24";
}
lease 192.168.10.150 {
starts 3 2005/12/07 15:24:17;
ends 3 2005/12/07 17:24:17;
binding state active;
next binding state free;
hardware ethernet 00:40:05:de:2a:f6;
}
lease 192.168.10.148 {
starts 3 2005/12/07 15:29:46;
ends 3 2005/12/07 15:39:46;
binding state active;
next binding state free;
hardware ethernet 00:09:5b:3e:ae:e5;
uid "\001\000\011[>\256\345";
}

All of my firewall routing rules seem to continue to work fine. If I setup a computer with a static IP address, everything works fine on the network. I have not been able to locate any error messages in any system log files. Does anyone have any suggestions what I should look into next?

Thanks!
_________________
Jason - jsweat_php AT yahoo DOT com

[UberLord]

Check if dhcp is really listening

[sweatje]