SV: dhcp on p-t-p interface
Blake Hudson
blake at ispn.net
Tue Sep 23 16:28:22 UTC 2008
your log states: "Sep 20 07:58:33 hera dhcpd: No subnet declaration for
venet0:0 (0.0.0.0)."
Define one...
subnet x.x.x.x netmask x.x.x.x
{
authoritative;
}
DHCP will listen on any interface it's told to listen on...
-------- Original Message --------
Subject: SV: dhcp on p-t-p interface
From: Anders Rosendal <anders at rosendal.nu>
To: dhcp-users at isc.org
Date: Saturday, September 20, 2008 1:01:00 AM
>
> Hi
>
> Thanks Blake.
>
> I do use ”-q” when starting dhcpd. Could you describe more what you
> mean with “dummy unathorative”?
>
>
>
> I also saw that I had missed one interesting line in the syslog output
> in my last message (the unknown address type).
>
> My guess is that the problem is that the broadcast is 0.0.0.0.
>
> 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?
>
>
>
> Regards Anders R
>
>
>
> Sep 20 07:58:33 hera dhcpd: Internet Systems Consortium DHCP Server V3.0.6
>
> Sep 20 07:58:33 hera dhcpd: Copyright 2004-2007 Internet Systems
> Consortium.
>
> Sep 20 07:58:33 hera dhcpd: All rights reserved.
>
> Sep 20 07:58:33 hera dhcpd: For info, please visit
> http://www.isc.org/sw/dhcp/
>
> Sep 20 07:58:33 hera dhcpd: Wrote 0 leases to leases file.
>
> *Sep 20 07:58:33 hera dhcpd: venet0:0: unknown hardware address type
> 65535*
>
> Sep 20 07:58:33 hera dhcpd:
>
> Sep 20 07:58:33 hera dhcpd: No subnet declaration for venet0:0 (0.0.0.0).
>
> Sep 20 07:58:33 hera dhcpd: ** Ignoring requests on venet0:0. If this
> is not what
>
> Sep 20 07:58:33 hera dhcpd: you want, please write a subnet declaration
>
> Sep 20 07:58:33 hera dhcpd: in your dhcpd.conf file for the network
> segment
>
> Sep 20 07:58:33 hera dhcpd: to which interface venet0:0 is attached. **
>
> Sep 20 07:58:33 hera dhcpd:
>
> Sep 20 07:58:33 hera dhcpd:
>
> Sep 20 07:58:33 hera dhcpd: Not configured to listen on any interfaces!
>
>
>
> *Från:* dhcp-users-bounce at isc.org [mailto:dhcp-users-bounce at isc.org]
> *För *Blake Hudson
> *Skickat:* den 20 september 2008 00:05
> *Till:* dhcp-users at isc.org
> *Ämne:* Re: dhcp on p-t-p interface
>
>
>
> 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.
>
> --Blake
>
> -------- Original Message --------
> Subject: dhcp on p-t-p interface
> From: Anders Rosendal <anders at rosendal.nu> <mailto:anders at rosendal.nu>
> To: dhcp-users at isc.org <mailto:dhcp-users at isc.org>
> Date: Friday, September 19, 2008 3:41:35 PM
>
>
>
> Hi
> 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.
> I guess that the hosting supplier is using XEN or similar to provide
> the service.
> This is what I've got:
>
> A Ubuntu 8.04 LTS server with isc-dhcpd-V3.0.6.
>
> rosendal at hera:~$ cat /etc/network/interfaces
> # This configuration file is auto-generated.
> # WARNING: Do not edit this file, otherwise your changes will be lost.
> # Please edit template /etc/network/interfaces.template instead.
>
>
> # Auto generated interfaces
> auto lo
> iface lo inet loopback
>
> auto venet0
> iface venet0 inet static
> address 127.0.0.1
> netmask 255.255.255.255
> broadcast 0.0.0.0
> up route add -net 192.0.2.1 netmask 255.255.255.255 dev venet0
> up route add default gw 192.0.2.1
>
> iface venet0 inet6 static
> address ::1
> netmask 128
>
> auto venet0:0
> iface venet0:0 inet static
> address 79.99.1.114
> netmask 255.255.255.255
> broadcast 0.0.0.0
>
> rosendal at hera:~$ ifconfig -a
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
>
> venet0 Link encap:UNSPEC HWaddr
> 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
> inet addr:127.0.0.1 P-t-P:127.0.0.1 Bcast:0.0.0.0
> Mask:255.255.255.255
> inet6 addr: ::1/128 Scope:Host
> UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
> RX packets:452 errors:0 dropped:0 overruns:0 frame:0
> TX packets:339 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:49704 (48.5 KB) TX bytes:56924 (55.5 KB)
>
> venet0:0 Link encap:UNSPEC HWaddr
> 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
> inet addr:79.99.1.114 P-t-P:79.99.1.114 Bcast:0.0.0.0
> Mask:255.255.255.255
> UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
>
> rosendal at hera:~$
>
> The dhcpd.conf file is copied from the working server and I have added:
>
> subnet 79.99.1.114 netmask 255.255.255.255 {
> }
>
>
> but when restarting dhcpd I get the following message in dhcpd I get
> the following message:
>
> Sep 19 22:30:04 hera dhcpd: No subnet declaration for venet0:0 (0.0.0.0).
> Sep 19 22:30:04 hera dhcpd: ** Ignoring requests on venet0:0. If this
> is not what
> Sep 19 22:30:04 hera dhcpd: you want, please write a subnet declaration
> Sep 19 22:30:04 hera dhcpd: in your dhcpd.conf file for the network
> segment
> Sep 19 22:30:04 hera dhcpd: to which interface venet0:0 is attached. **
> Sep 19 22:30:04 hera dhcpd:
> Sep 19 22:30:04 hera dhcpd:
> Sep 19 22:30:04 hera dhcpd: Not configured to listen on any interfaces!
>
>
>
> Does anyone has suggestion how I should configure to get the server to
> listen to the venet0:0 interface?
> The router on my main network is configured to forward dhcp-requests
> to my "redundant" server, so this is not a problem.
>
>
> Thanks in advance.
>
> Regards Anders R
>
>
> --
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>
>
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