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<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hi<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks Blake.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I do use ”-q” when starting dhcpd. Could you describe more what
you mean with “dummy unathorative”?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I also saw that I had missed one interesting line in the syslog
output in my last message (the unknown address type).<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>My guess is that the problem is that the broadcast is 0.0.0.0.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Is it possible to make dhcpd not listen to broadcast, and only open
udp port 67 and listen for packets that are addressed to the server?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Regards Anders R<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: Internet Systems Consortium DHCP
Server V3.0.6<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: Copyright 2004-2007 Internet Systems
Consortium.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: All rights reserved.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: For info, please visit
http://www.isc.org/sw/dhcp/<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: Wrote 0 leases to leases file.<o:p></o:p></span></p>
<p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:
"Calibri","sans-serif";color:#1F497D'>Sep 20 07:58:33 hera dhcpd: venet0:0:
unknown hardware address type 65535<o:p></o:p></span></b></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: No subnet declaration for venet0:0
(0.0.0.0).<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: ** Ignoring requests on venet0:0.
If this is not what<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: you want, please write a subnet
declaration<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: in your dhcpd.conf file for the
network segment<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: to which interface venet0:0 is
attached. **<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sep 20 07:58:33 hera dhcpd: Not configured to listen on any
interfaces!<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>Från:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> dhcp-users-bounce@isc.org
[mailto:dhcp-users-bounce@isc.org] <b>För </b>Blake Hudson<br>
<b>Skickat:</b> den 20 september 2008 00:05<br>
<b>Till:</b> dhcp-users@isc.org<br>
<b>Ämne:</b> Re: dhcp on p-t-p interface<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Start DHCPD with '-q venet0:0' or similar or put in
79.99.1.114 as a dummy unauthoritative subnet that does not have any pools.<br>
<br>
--Blake<br>
<br>
-------- Original Message --------<br>
Subject: dhcp on p-t-p interface<br>
From: Anders Rosendal <a href="mailto:anders@rosendal.nu"><anders@rosendal.nu></a><br>
To: <a href="mailto:dhcp-users@isc.org">dhcp-users@isc.org</a><br>
Date: Friday, September 19, 2008 3:41:35 PM<br>
<br>
<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p><span style='font-size:10.0pt'>Hi<br>
I'm having one server at local LAN that I'm serving with IP's. I'm now trying
out a a virtual server from a hosting provider, and aiming to use that as a
redundant dhcp-server. When installing dhcpd on it I ran into problems. The
public network interface of the server is a p-t-p one, with a broadcast set to
0.0.0.0.<br>
I guess that the hosting supplier is using XEN or similar to provide the
service.<br>
This is what I've got:<br>
<br>
A Ubuntu 8.04 LTS server with isc-dhcpd-V3.0.6.<br>
<br>
rosendal@hera:~$ cat /etc/network/interfaces<br>
# This configuration file is auto-generated.<br>
# WARNING: Do not edit this file, otherwise your changes will be lost.<br>
# Please edit template /etc/network/interfaces.template instead.<br>
<br>
<br>
# Auto generated interfaces<br>
auto lo<br>
iface lo inet loopback<br>
<br>
auto venet0<br>
iface venet0 inet static<br>
address 127.0.0.1<br>
netmask 255.255.255.255<br>
broadcast 0.0.0.0<br>
up route add -net 192.0.2.1 netmask
255.255.255.255 dev venet0<br>
up route add default gw 192.0.2.1<br>
<br>
iface venet0 inet6 static<br>
address ::1<br>
netmask 128<br>
<br>
auto venet0:0<br>
iface venet0:0 inet static<br>
address 79.99.1.114<br>
netmask 255.255.255.255<br>
broadcast 0.0.0.0<br>
<br>
rosendal@hera:~$ ifconfig -a<br>
lo Link encap:Local Loopback <br>
inet
addr:127.0.0.1 Mask:255.0.0.0<br>
inet6 addr: ::1/128
Scope:Host<br>
UP LOOPBACK
RUNNING MTU:16436 Metric:1<br>
RX packets:0 errors:0
dropped:0 overruns:0 frame:0<br>
TX packets:0 errors:0
dropped:0 overruns:0 carrier:0<br>
collisions:0
txqueuelen:0<br>
RX bytes:0 (0.0 B)
TX bytes:0 (0.0 B)<br>
<br>
venet0 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 <br>
inet
addr:127.0.0.1 P-t-P:127.0.0.1 Bcast:0.0.0.0
Mask:255.255.255.255<br>
inet6 addr: ::1/128
Scope:Host<br>
UP BROADCAST POINTOPOINT
RUNNING NOARP MTU:1500 Metric:1<br>
RX packets:452 errors:0
dropped:0 overruns:0 frame:0<br>
TX packets:339 errors:0
dropped:0 overruns:0 carrier:0<br>
collisions:0
txqueuelen:0<br>
RX bytes:49704 (48.5
KB) TX bytes:56924 (55.5 KB)<br>
<br>
venet0:0 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 <br>
inet
addr:79.99.1.114 P-t-P:79.99.1.114 Bcast:0.0.0.0
Mask:255.255.255.255<br>
UP BROADCAST POINTOPOINT
RUNNING NOARP MTU:1500 Metric:1<br>
<br>
rosendal@hera:~$<br>
<br>
The dhcpd.conf file is copied from the working server and I have added:<br>
<br>
subnet 79.99.1.114 netmask 255.255.255.255 {<br>
}<br>
<br>
<br>
but when restarting dhcpd I get the following message in dhcpd I get the
following message:<br>
<br>
Sep 19 22:30:04 hera dhcpd: No subnet declaration for venet0:0 (0.0.0.0).<br>
Sep 19 22:30:04 hera dhcpd: ** Ignoring requests on venet0:0. If this is
not what<br>
Sep 19 22:30:04 hera dhcpd: you want, please write a subnet
declaration<br>
Sep 19 22:30:04 hera dhcpd: in your dhcpd.conf file for the
network segment<br>
Sep 19 22:30:04 hera dhcpd: to which interface venet0:0 is
attached. **<br>
Sep 19 22:30:04 hera dhcpd:<br>
Sep 19 22:30:04 hera dhcpd:<br>
Sep 19 22:30:04 hera dhcpd: Not configured to listen on any interfaces!<br>
<br>
<br>
<br>
Does anyone has suggestion how I should configure to get the server to listen
to the venet0:0 interface?<br>
The router on my main network is configured to forward dhcp-requests to my
"redundant" server, so this is not a problem.<br>
<br>
<br>
Thanks in advance.<br>
<br>
Regards Anders R</span> <o:p></o:p></p>
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