Server :: DHCP Server Not Leasing IP
May 12, 2011
I have server which has "Xen/debian" installed. On this there is a virtual machine which has "Debian" installed. This virtual machine is used as a dhcp server for the network. Since yesterday, its not leasing any ip address! when i connect its ethernet cable to switch it says "eth0: received packet with its own address as IP address". the only thing that i remember (which might have caused the problem) is adding a mirror server(a different machine). The dhcp server gave it the address 192.168.1.1(the network is 192.168.1.0/24) and it was working fine. anyone knows how to solve the problem?
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Jan 24, 2011
This dhcp server is configured with redhat enterprise edition. I found that logs are generating in the following path /var/log my doubt is how can i setup the logs generating for a specified day.
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Oct 22, 2010
Back in April I set up a Ubuntu DHCP server and a multiple VLAN network [URL] to migrate our various servers, workstations, etc off the 192.168.1.1 /24 network that everything was on because we where running out of address space. I built out the new network and everything worked great except our AD server would never get an IP address from the DHCP server (static reservation) and even if I set the IP statically on the AD server it couldn't ping the gateway and noone could log in. After several attempts to resolve this, including bringing in outside help, we where never able to figure out what the problem was.
Now 6 months later I have time to revisit the issue without effecting the live network. I used Acronis and imaged the AD server last Friday, cloned it on to another box with the same hardware, and put it up on the new network that's been sitting unused for the last 6 months. Today when I statically set the IP on the AD server (which is what I want) it connects and I can ping it's gateway 192.168.1.1 and all the way across vlans to a test sales agent workstation at 192.168.8.xxx on vlan 800 but only if I statically assign the agents station an IP address. When I try to get an IP address via DHCP it fails as destination unreachable. Nothing has changed in the last 6 months on the DHCP server but now it for some reason can't ping its default gateway 192.168.1.1. All of the config files are the same as they where left from the post linked above aside from the vlan id's used where changed from 1's to 100's (i.e. vlan 3 is now vlan 300) /etc/network/interfaces
Code:
auto lo
iface lo inet loopback
auto vlan100
iface vlan100 inet static
[code]....
why it can't reach the gateway, when I do a tcpdump I can see the DHCP requests come in on eth0 but the server never responds and I'm pretty sure its because it isn't "seeing" them since it thinks there isn't a network connection but I don't know how to trouble shoot to find out where the problem lies.
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Jul 1, 2010
Back in April I set up a Ubuntu DHCP server and a multiple VLAN network [URL] to migrate our various servers, workstations, etc off the 192.168.1.1 /24 network that everything was on because we where running out of address space. I built out the new network and everything worked great except our AD server would never get an IP address from the DHCP server (static reservation) and even if I set the IP statically on the AD server it couldn't ping the gateway and noone could log in. After several attempts to resolve this, including bringing in outside help, we where never able to figure out what the problem was.
Now 6 months later I have time to revisit the issue without effecting the live network. I used Acronis and imaged the AD server last Friday, cloned it on to another box with the same hardware, and put it up on the new network that's been sitting unused for the last 6 months. Today when I statically set the IP on the AD server (which is what I want) it connects and I can ping it's gateway 192.168.1.1 and all the way across vlans to a test sales agent workstation at 192.168.8.xxx on vlan 800 but only if I statically assign the agents station an IP address.
When I try to get an IP address via DHCP it fails as destination unreachable. Nothing has changed in the last 6 months on the DHCP server but now it for some reason can't ping its default gateway 192.168.1.1. All of the config files are the same as they where left from the post linked above aside from the vlan id's used where changed from 1's to 100's (i.e. vlan 3 is now vlan 300) /etc/network/interfaces
Code:
auto lo
iface lo inet loopback
auto vlan100
[code]....
why it can't reach the gateway, when I do a tcpdump I can see the DHCP requests come in on eth0 but the server never responds and I'm pretty sure its because it isn't "seeing" them since it thinks there isn't a network connection but I don't know how to trouble shoot to find out where the problem lies.
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Mar 25, 2010
I am puzzled with trying to configure a linux (openSUSE) client to dhcp to eBox DHCP server. I am using dhclient to lease an IP address with dhclient eth0 -s 10.45.48.108 and get a response
openSUSE11232CL1 dhclient: DHCPDISCOVER on eth0 to 10.45.48.108 port 67 interval 4
openSUSE11232CL1 dhclient: DHCPOFFER from 10.45.48.108
openSUSE11232CL1 dhclient: DHCPREQUEST on eth0 to 10.45.48.108 port 67
openSUSE11232CL1 dhclient: send_packet: Network is unreachable
openSUSE11232CL1 dhclient: send_packet: please consult README file regarding broadcast address.
The server reports eBox141 dhcpd: DHCPDISCOVER from 00:0c:29:3e:57:a3 (openSUSE11232CL1.domain.net) via eth0
eBox141 dhcpd: DHCPOFFER on 10.45.200.2 to 00:0c:29:3e:57:a3 (openSUSE11232CL1.domain.net) via eth0
I interpret this as the server receives the request and the client accepting it but the lease does not last long and the connection breaks. what this could be and why the connection breaks? Or my undestanding is totally wrong on how it works and should work? And BTW, where is that README file that's referenced in the message I receive on the client?
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Mar 8, 2010
Currently I have my eth0 interface getting a DHCP address but at times the DHCP server will not be reachable. Sooo what I would like my server to do is if it cannot find a DHCP server assign a static address to eth0. Then start the DHCP service so it can then dish out some addresses.How can I do this? Surely it is possible
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Aug 4, 2010
I have an embedded device for which I've created an html configuration page. This page allows you to set static IPs, dhcp, and can scan for wireless devices.My problem is that in order to access the device it requires that it runs as a dhcp server otherwise people are not assigned an IP and so can not access the embedded devices static IP. (This config page is for the laymen and so they are not the type who are able to set up their own static IPs). One of the potential options is to have the device connect to the network on eth0 acting as a dhcp client. However this prevents me from running a dhcp server.One solution I can think of is running a dhcp server only if it doesn't detect another dhcp server running on the network.
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Dec 2, 2010
I'm no expert on DHCP. My problem is that i have a CentOS 5.5 server on which i want to install a DHCP server. I have two NICs where eth0 has access to the internet and where eth1 should act as an DHCP server.
I have installed dhcpd and this is how my dhcpd.conf file looks like.
Code:
ifconfig looks like this
Code:
When i start dhcpd on eth1 i get no error messages but when i connect any devices to eth1 they don't get any IP. I cant find anything in any logs about devices trying to get an IP address. I dont have any firewall rules in iptables.
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Nov 17, 2010
I'm trying to set up a PXE boot server on a PC running Slackware 13.0 using the default apps and info shipped with that Slackware version but to no avail...Carefully reading the Slackware 13.0 README_PXE I've put together this dhcpd.conf file:
# dhcpd.conf
#
# Configuration file for ISC dhcpd (see 'man dhcpd.conf')
[code]....
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May 27, 2010
On a remote system, when all you have is the ssh CLI -
How do you find out the ip addresses for:the Gateway
the DHCP server
the DNS server
Don't need to make any changes.
Which commands will display this info?
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Jan 6, 2011
I have come across this option given below in dhcpd.conf file for DHCP Server configuration. Can any body let me know what this option is all about.Code:option T150 code 150 = string;
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Jun 14, 2011
I wanted to setup my server as a router/gateway just for educational purposes and also when it succeeded i will keep the gateway and place it on the front line right after my modem.
My current setup as it is now :
The GATEWAY/ROUTER will be doing the main work to act as a dhcp server and firewall.
Now my setup as it is now :
So now what i ment to do was :
Let the clients connect to the gateway via ETH1 and all the stuff being router to ETH0 which is the NIC that is connected to the internet.
But now i have two huge problems :
1. The DHCP configuration seems to be fine the client machines get their ip adresses and /etc/resolve.conf looks fine to. But somehow the GATEWAY/ROUTER wont let me use the specified external DNs server so i cant do anything on these machines.
2. The firewall script [url] at line 27 should be DROP but if i use this line of code the GATEWAY/ROUTER cannot use his dns server settings so when i try to browse the internet or ping a machine outside my local network it would came up with nothing.
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Nov 4, 2010
\Actually i lost the login details of my server so im recovering it in rescue mode.what i want to ask here is if i restarted my server what i need to do in order to work as it was before.on my server samba and dhcp server is configured.will my client users can access there network if login page comes or i need to do something else such as restarting services or not.
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Dec 3, 2010
I have a openSUSE10.2(X86-64) Linux DHCP Server in my environment. It has a lot of VM's and Desktop systems which get added continuously. Also, it has a lots of Static-IP entries.Part-IIssue:The DHCP Server stopped leasing the IP's somehow.Workaround:1. Stopped the dhcpd service. (service dhcpd stop)2. Navigated to /var/lib/dhcp/db folder.3. Deleted the "dhcpd.leases" and "dhcpd.leases~" files.4. Recreated the "dhcpd.leases" file. (touch dhcpd.leases)5. Started the dhcpd service. (service dhcpd stop)
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May 18, 2010
I've set up a very simple net with a dhcp + dns server using dnsmasq. It works but the server itself cant resolv clients names. Clients do resolv without any problem my /etc/dnsmasq.conf
[Code]...
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Jul 8, 2010
I want to set up a dhcp server such that the clients get same ip every time. Giving fixed address to every client would be a long process.
"I don't want to assign a specific ip to the client but what i want is the server provides same ip every time"
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Nov 23, 2010
Just looking for the best/most reliable setup. In a nutshell, I would love to have a Domain Controller no DHCP File server. I want to leave the DHCP to the router. I need virtual to run a software off from it. Samba server and that is basically it. My questions are:
1. Can I have a Domain Controller without DHCP server?
2. Should I run virtual server headless? so I dont install any gui?
3. This should have been my 1st question. I have two disks, is raid handled by the Bios or do I have to do something in linux(DMRAID)?
I have worked with many if not all the things I have mentioned here, however, I have never done it from scratch.
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Dec 13, 2010
How to given a range of IPs (like 1 to 200) through DHCP server?
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Apr 13, 2011
I have a network with one of the server machine being under Fedora 14 and the clients machines being under Windows 7 and Fedora 14.
Quite often I get some difficulties for the clients to get an IP address from the dhcp server. If I look at the server logs, it looks like the server sees the requests and sends and answer:
Apr 12 19:33:18 dhcpd: DHCPDISCOVER from 00:21:70:c5:22:4e via eth1
Apr 12 19:33:18 dhcpd: DHCPOFFER on 192.168.28.52 to 00:21:70:c5:22:4e via eth1
Apr 12 19:33:23 dhcpd: DHCPDISCOVER from 00:21:70:c5:22:4e via eth1
Apr 12 19:33:23 dhcpd: DHCPOFFER on 192.168.28.52 to 00:21:70:c5:22:4e via eth1
Apr 12 19:33:33 dhcpd: DHCPDISCOVER from 00:21:70:c5:22:4e via eth1
[Code].....
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Apr 22, 2010
I'm kinda new to this. I've had my laptop dual booted with vista and Ubuntu for about a year. I'm just now starting to configure Ubuntu for a DNS and a DHCP Server.
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Mar 17, 2010
I'm trying to build a linux(fedora 12) dhcpd server(and gateway), that have 3 network cards(eth0 have with public ip, eth1 192.168.2.1 class and eth3 with 192.168.3.1 class).
Because I have just a switch, I want to put both cables(from eth1, eth2) in the switch. Every client has 2 network card(eth0, eth1). My question is, is there any way to conf eth0 to take from server ip from 192.168.2.1 class, and eth1 from 192.168.3.1? The internet will work only on eth0.
my dhcpd.conf for now looks like this:
subnet 192.168.2.0 netmask 255.255.255.0 {
option subnet-mask 255.255.255.0;
option routers 192.168.2.1;
[Code]....
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Jul 14, 2011
I am trying to set up a DHCP server for a network that does not go on the internet using fedora 14. I have tried several site and every one I look at has a different dhcpd.conf file. I have tried many and every time I try to start the service they fail. Like I said it does not go on the internet. No matter what I do when I try to start the dhcpd service it fails[root@pcrepair ~]# service dhcpd startStarting dhcpd: [FAILED]here is my current config file
# specify domain name
option domain-name
"server.world";
[code]....
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Apr 16, 2010
I want to create a dedicated DHCP server in Red Hat Linux for a small office with a private range from 192.168.1.10 to 192.168.1.20
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Mar 27, 2010
How to install DHCP server in ubuntu 9.10, i googled but not able to find correct how to. if anyone installed provide steps in configuring dhcp3.conf file
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Feb 23, 2010
I've tried to configure DRBL server to use Clonezilla and that is required me to setup DHCP, TFTP serversBut I've gotten a lot of errors from them - so please look at my attachments from /var/log/messages and dhcpd.conf - help me to find out what are wrong with them.
Feb 23 09:47:46 eth0-eth0 last message repeated 17 times
Feb 23 09:55:06 eth0-eth0 dhcpd: DHCPREQUEST for 192.168.1.53 from 00:13:20:36:26:28 via eth0: unknown lease 192.168.1.53.
[code]....
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Feb 5, 2010
I have read a lot of threads about this topic and tried everything as best of my knowledge but I still can not make it to work.Need specific directions on whats wrong, missing or how to debug the problem.Here is the DHCP error:
14:49:05 Unable to add forward map from service2.example.com. to 192.168.1.150: timed out
14:49:05 DHCPREQUEST for 192.168.1.150 from 00:04:75:d3:9f:27 (service2) via ETH02
14:49:05 DHCPACK on 192.168.1.150 to 00:04:75:d3:9f:27 (service2) via ETH02
[code]....
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Jul 30, 2010
I have installed RHEL 5.1 in VMWare 6 I want to configure one RHEL Server with DNS & DHCP Also I would like to PXE boot, whenever I create a new VMWare Client(RHEL), the installation should be initiated via network boot
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Jul 5, 2010
here to learn some good technical stuffs
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Mar 27, 2010
I am at first stage of installing dns after installation of redhat 5 am unable to install any package like yum install bin* and yum install cach* and it displays no match for afgument and nothing to do what could be the problem with my redhat installtion and what should i do for this type of problem and explain me how to install bind in dns and dhcp and dc.
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Nov 29, 2010
I've been using Debian Squeeze for a few years now, no troubles connecting to a DHCP server in PPOE session... (DSL service) until this morning (11.29.10) when now I do (that is to say; browser, email prog., terminal, real player, etc., just won't connect). I can do dual boot, & so am in Windows XP at the moment.
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