DHCP and Win7
Grace He
ghe at ryerson.ca
Tue Feb 26 18:12:14 UTC 2013
Hector: try the following:
1. disable both wired and wireless on your PC
2. enable only wired connection on your PC
3. make sure the dhcp server and PC are on the same network
4. on PC: run "ipconfig" to ensure it has wired connection
5. on PC: run "ipconfig /release", then "ipconfig /renew"
6. on dhcp server: look into log to see if any dhcp request coming
from PC's MAC address
I don't believe the problem is with your dhcp server.
Cheers,
Grace
On Tue, Feb 26, 2013 at 12:07 PM, Héctor Herrera <hherreraa at gmail.com> wrote:
> @Grace: The wired network it works. It has the IP 169.254.150.144. And I'm
> sure the cable works properly, when I tried static IP configuration on my PC
> and on the server, I can connect the server by SSH.
>
> @Sten: What do you mean by 'Rogue server'?
> About the logs, I have only information about listening in eth0. Here's the
> log of /var/log/messages:
>
> Feb 26 11:46:42 communication-server kernel: [ 5842.440825] eth0: link down
> Feb 26 11:46:54 communication-server kernel: [ 5853.997185] eth0: link up,
> 100Mbps, full-duplex, lpa 0xCDE1
> Feb 26 11:47:47 communication-server kernel: [ 5907.387040] ip_tables: (C)
> 2000-2006 Netfilter Core Team
> Feb 26 11:48:04 communication-server kernel: [ 5923.659054] nf_conntrack
> version 0.5.0 (16139 buckets, 64556 max)
> Feb 26 11:48:04 communication-server kernel: [ 5923.659917]
> CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Please use
> Feb 26 11:48:04 communication-server kernel: [ 5923.659922]
> nf_conntrack.acct=1 kernel parameter, acct=1 nf_conntrack module option or
> Feb 26 11:48:04 communication-server kernel: [ 5923.659925] sysctl
> net.netfilter.nf_conntrack_acct=1 to enable it.
> Feb 26 12:23:26 communication-server kernel: [ 8045.972235] device eth0
> entered promiscuous mode
> Feb 26 12:23:36 communication-server kernel: [ 8055.894186] eth0: link down
> Feb 26 12:23:41 communication-server kernel: [ 8060.958909] eth0: link up,
> 100Mbps, full-duplex, lpa 0xCDE1
> Feb 26 12:58:15 communication-server kernel: [10134.684416] device eth0 left
> promiscuous mode
>
>
> Should I use eth0 on promiscuous mode? I've tried that, but isn't working...
> And about the sniffing, my server listens for any DHCP query on eth0, so I
> used ngrep -d eth0 (listen all the traffic on eth0), and nothing...
>
>
> 2013/2/26 Sten Carlsen <stenc at s-carlsen.dk>
>>
>> Just a thought: Rogue DHCP server?
>>
>> Server logs, will contain info if discover is received.
>>
>> sniffing at the server to see if any discover packets arrive.
>>
>>
>> On 26/02/13 16:57, Héctor Herrera wrote:
>>
>> I had tested with static. It works. Both cards (in the DHCP server) are
>> working fine. And also I tried to catch with a sniffer in the network
>> between Win7 and my DHCP server, and I got nothing :(
>>
>>
>> 2013/2/26 Łukasz Siemiradzki <lukasz.siemiradzki at gmail.com>
>>>
>>> Hello!
>>> Are you sure that your problem lies on DHCP level? Have you tested the
>>> connectivity between windows 7 client and the dhcp server using static
>>> addresses?
>>> If so and there is connectivity - can you start sniffer (i.e. wireshark)
>>> on Win7, configure it to listen on an active interface and gather data?
>>> BR
>>> ŁS
>>>
>>>
>>> 2013/2/26 Héctor Herrera <hherreraa at gmail.com>
>>>>
>>>> Well, I assume the trouble here is Win7. But, why? That's my question. I
>>>> don't understand why Win7 isn't asking the DHCP server for an IP address.
>>>> (Or maybe is the DHCP server the trouble? I don't really understand it,
>>>> that's why isn't so clear my question)
>>>>
>>>> I'm trying to collect information in the network between my Win7 test
>>>> machine and the server. The network is dead, I haven't received any
>>>> information. And I'm renewing all the connections in Win7 (ipconfig /renew).
>>>>
>>>> BTW, I tried with both ethernet interfaces for the IP information (I
>>>> configured the server on eth0 and eth1), without good results. I dunno what
>>>> else can I do. Do you have any ideas?
>>>>
>>>>
>>>> 2013/2/26 Oskar Berggren <oskar.berggren at gmail.com>
>>>>>
>>>>> You started with "unable to send IP addresses to Win7" but with your
>>>>> latest info it seems like the proper question is the reverse: "why
>>>>> can't win7 send DHCP requests to my DHCP server?".
>>>>>
>>>>> Is Win7 configured to use DHCP?
>>>>> If you use wireshark or tcpdump on Win7 and on the DHCP server, do you
>>>>> see any DHCPDISCOVER from the Win7 machine?
>>>>>
>>>>> /Oskar
>>>>>
>>>>>
>>>>> 2013/2/26 Héctor Herrera <hherreraa at gmail.com>:
>>>>> > That´s the trouble, I haven't any information about Windows 7 asking
>>>>> > for an
>>>>> > IP to my server.
>>>>> >
>>>>> > This is my dhcpd.conf. It's really basic because I want, first of
>>>>> > all, the
>>>>> > service working:
>>>>> >
>>>>> > option domain-name "galatea.cl";
>>>>> > option domain-name-servers 8.8.8.8, 200.62.222.222;
>>>>> > option routers 192.168.1.1;
>>>>> > default-lease-time 600;
>>>>> > max-lease-time 7200;
>>>>> > server-identifier 192.168.1.1;
>>>>> > #ddns-update-style none;
>>>>> > authoritative;
>>>>> > log-facility local7;
>>>>> >
>>>>> > subnet 192.168.1.0 netmask 255.255.255.0 {
>>>>> > range 192.168.1.15 192.168.1.100;
>>>>> > }
>>>>> >
>>>>> > I have some rules on iptables too:
>>>>> >
>>>>> > Generated by iptables-save v1.4.8 on Tue Feb 26 11:48:15 2013
>>>>> > *nat
>>>>> > :PREROUTING ACCEPT [4:312]
>>>>> > :POSTROUTING ACCEPT [0:0]
>>>>> > :OUTPUT ACCEPT [0:0]
>>>>> > -A PREROUTING -s 192.168.0.0/24 -p tcp -m tcp --dport 80 -j REDIRECT
>>>>> > --to-ports 3128
>>>>> > -A PREROUTING -s 192.168.1.0/24 -p tcp -m tcp --dport 80 -j REDIRECT
>>>>> > --to-ports 3128
>>>>> > COMMIT
>>>>> > # Completed on Tue Feb 26 11:48:15 2013
>>>>> > # Generated by iptables-save v1.4.8 on Tue Feb 26 11:48:15 2013
>>>>> > *filter
>>>>> > :INPUT ACCEPT [27:2066]
>>>>> > :FORWARD ACCEPT [0:0]
>>>>> > :OUTPUT ACCEPT [13:1324]
>>>>> > -A INPUT -i eth1 -p tcp -m state --state NEW -m tcp --dport 3128 -j
>>>>> > ACCEPT
>>>>> > COMMIT
>>>>> > # Completed on Tue Feb 26 11:48:15 2013
>>>>> >
>>>>> > I don't have any other information. As I said, the logs doesn't show
>>>>> > me
>>>>> > information about Win7. Oh, and Win7 hasn't active the Firewall
>>>>> > Service.
>>>>> >
>>>>> >
>>>>> > 2013/2/26 Steven Carr <sjcarr at gmail.com>
>>>>> >>
>>>>> >> Can you see the requests coming in to the DHCP server from the
>>>>> >> Windows
>>>>> >> 7 client? and can you also perform a packet capture on the Windows 7
>>>>> >> machine to see if it is receiving the responses from the DHCP
>>>>> >> server.
>>>>> >> If you can upload the logs (sanitised) and the packet capture then I
>>>>> >> can have a look.
>>>>> >>
>>>>> >> Steve
>>>>> >>
>>>>> >>
>>>>> >> On 26 February 2013 13:10, Héctor Herrera <hherreraa at gmail.com>
>>>>> >> wrote:
>>>>> >> > Greetings to all!
>>>>> >> >
>>>>> >> > I have an issue with DHCP and Win7. I'm working with Debian 6.0.6,
>>>>> >> > and
>>>>> >> > I''m
>>>>> >> > trying to mount a DHCP server on it (DHCP ver. 4.1.1). But I'm
>>>>> >> > unable to
>>>>> >> > send IP addresses to Win7 machines. I tried with other OS
>>>>> >> > (specifically
>>>>> >> > Arch
>>>>> >> > Linux and WinXP), and the server sends IP addresses to them, but
>>>>> >> > with
>>>>> >> > Win7... I cannot
>>>>> >> >
>>>>> >> > May someone knows how to handle it? And if it so, can someone send
>>>>> >> > some
>>>>> >> > information?
>>>>> >> >
>>>>> >> > Thanks to all!
>>>>> >> >
>>>>> >> > P.D: Sorry about the English, it isn't my first language :P
>>>>> >> >
>>>>> >> > --
>>>>> >> > Saludos
>>>>> >> >
>>>>> >> > Héctor Herrera Anabalón
>>>>> >> > Egresado ICCI UNAP
>>>>> >> > Servicio Arquitectura Galatea - Oficina Técnica
>>>>> >> > http://www.galatea.cl
>>>>> >> > Miembro USoLIX Victoria
>>>>> >> > Registered User #548600 (LinuxCounter.net)
>>>>> >> >
>>>>> >> > _______________________________________________
>>>>> >> > dhcp-users mailing list
>>>>> >> > dhcp-users at lists.isc.org
>>>>> >> > https://lists.isc.org/mailman/listinfo/dhcp-users
>>>>> >> _______________________________________________
>>>>> >> dhcp-users mailing list
>>>>> >> dhcp-users at lists.isc.org
>>>>> >> https://lists.isc.org/mailman/listinfo/dhcp-users
>>>>> >
>>>>> >
>>>>> >
>>>>> >
>>>>> > --
>>>>> > Saludos
>>>>> >
>>>>> > Héctor Herrera Anabalón
>>>>> > Egresado ICCI UNAP
>>>>> > Servicio Arquitectura Galatea - Oficina Técnica http://www.galatea.cl
>>>>> > Miembro USoLIX Victoria
>>>>> > Registered User #548600 (LinuxCounter.net)
>>>>> >
>>>>> > _______________________________________________
>>>>> > dhcp-users mailing list
>>>>> > dhcp-users at lists.isc.org
>>>>> > https://lists.isc.org/mailman/listinfo/dhcp-users
>>>>> _______________________________________________
>>>>> dhcp-users mailing list
>>>>> dhcp-users at lists.isc.org
>>>>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Saludos
>>>>
>>>> Héctor Herrera Anabalón
>>>> Egresado ICCI UNAP
>>>> Servicio Arquitectura Galatea - Oficina Técnica http://www.galatea.cl
>>>> Miembro USoLIX Victoria
>>>> Registered User #548600 (LinuxCounter.net)
>>>>
>>>> _______________________________________________
>>>> dhcp-users mailing list
>>>> dhcp-users at lists.isc.org
>>>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>>
>>>
>>>
>>>
>>> --
>>>
>>> "Omnes homines natura scire desiderant"
>>> Aristotelis
>>>
>>> _______________________________________________
>>> dhcp-users mailing list
>>> dhcp-users at lists.isc.org
>>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>
>>
>>
>>
>> --
>> Saludos
>>
>> Héctor Herrera Anabalón
>> Egresado ICCI UNAP
>> Servicio Arquitectura Galatea - Oficina Técnica http://www.galatea.cl
>> Miembro USoLIX Victoria
>> Registered User #548600 (LinuxCounter.net)
>>
>>
>> _______________________________________________
>> dhcp-users mailing list
>> dhcp-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>
>>
>> --
>> Best regards
>>
>> Sten Carlsen
>>
>> No improvements come from shouting:
>>
>> "MALE BOVINE MANURE!!!"
>>
>>
>> _______________________________________________
>> dhcp-users mailing list
>> dhcp-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/dhcp-users
>
>
>
>
> --
> Saludos
>
> Héctor Herrera Anabalón
> Egresado ICCI UNAP
> Servicio Arquitectura Galatea - Oficina Técnica http://www.galatea.cl
> Miembro USoLIX Victoria
> Registered User #548600 (LinuxCounter.net)
>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
--
Grace He, P. Eng.
Technical Officer (IT Support)
Ryerson University
Dept. of Mechanical and Industrial Engineering
Faculty of Engineering, Architecture and Science
350 Victoria St., Toronto, ON, Canada
M5B 2K3
Office Location: Kerr Hall East - KHE137B
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