1
vote
1answer
71 views

DHCP troubleshooting - client timeouts

I have setup two ubuntu 13.10 serwers - one of them is in a small test network + two more clients, separated from our company's main network but connected to the Internet. This server is my testbox, ...
-1
votes
0answers
44 views

dhcp not assigning dns ip to client

i followed these steps(http://www.yolinux.com/TUTORIALS/DHCP-Server.html && http://www.yolinux.com/TUTORIALS/DHCP-Server.html) but am having a problem. the problem is that the dhcp server is ...
0
votes
1answer
54 views

What is changing the network interfaces?

I installed Ubuntu 12.04 to virtual machine. I have edited /etc/network/interfaces like this: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp Then I created a livecd.iso using ...
1
vote
1answer
93 views

How to configure linux DHCP servier for MPLS?

We are set up with a two-branch MPLS with a DCHP Helper on the Remote subnet. The DHCP service is running on a CentOS box. So I have two subnets: HostRange: 192.168.0.1 - 192.168.1.254 ...
0
votes
1answer
26 views

DHCPD: permanently leased IP being offered (twice) to random node and assignee

Greeting. On a small LAN (< 20 networked devices) with a cento6 5.9 server/dhcp-3.0.5-33.el5_9). I am configuring permanent leases thusly (dhcpd.conf, partial): range 10.115.64.60 ...
0
votes
1answer
37 views

Is there a Linux DHCP server that supports assigning different DNS servers to a given host?

Is there a DHCP server that runs on Linux which will allow me to configure what DNS servers get assigned to which host? E.g. If I have 192.168.0.10 and 192.168.0.20 on my network, I'd like to make it ...
0
votes
0answers
113 views

CentOS DHCP server not updating DNS nameserver on Ubuntu Client

I have a working DHCP server on CentOS, with /etc/dhcp/dhcpd.conf set up as follows: subnet 192.168.1.0 netmask 255.255.255.0 { option routers 192.168.1.1; option subnet-mask 255.255.255.0; ...
2
votes
0answers
79 views

How can I find which application is changing my routing table? [closed]

My setup is: Panda <--> PC. PC runs DHCP server. Panda gets IP settings from PC. After DHCP is done Panda has the following routing table: Destination Gateway Genmask Flags ...
2
votes
2answers
143 views

DHCPD clean leases on client disconnect

Is there a way to force ISC DHCPD to trigger expire or release for static lease right after client disconnect? I want to trigger a script right after client connects ("on commit" DHCPD event) and ...
1
vote
1answer
96 views

Push hostnames to a DNS server without DHCP

Considering the complete lack of luck I've had googling any terms related to this question, this may not even be possible, but: Is there a reasonably standard way to set a hostname on a machine, and ...
1
vote
2answers
66 views

Centos TFTP boot server without a dhcpd server

Good Day, I want to ask the comunity if it is possible to setup a TFTP boot server without running a local dhcpd server on the local box? The setup currently looks like this? What is currently ...
0
votes
0answers
48 views

Issue with routing across two networks with DHCP and NAS involved

I have a Linux network set up with three sub networks 192.168.1.0 (chaos), 192.168.3.0 (chaos-hs), and 192.168.5.0 (ute-netz) with three machines casimir, ute, raspberry, a nas server nas and a router ...
0
votes
0answers
80 views

How do I stop a Linux computer from sending a DHCP hostname?

I need to set up a Linux computer so that it uses DHCP but doesn't send any hostname at all. I'm using isc-dhclient-4.2.4 /etc/dhcp/dhclient.conf contains the line send host-name = gethostname(); ...
-1
votes
1answer
83 views

Using DHCP on virtual servers (ESXI) [closed]

I am setting up a small lab with 5 virtual servers running on VMware ESXi 5. The servers are: Network Services server (CentOS 6.4) LAMP server (CentOS 6.4) File server (CentOS 6.4) Zimbra mail ...
1
vote
0answers
76 views

How to send several instances of the vendor-specific options to a DHCP server using dhclient?

I need to send vendor-options to DHCP server using dhclient (ISC). I've added following lines in the dhclient.conf: option dhcp6.vendor-class code 16 = {integer 32, integer 16, string}; send ...
1
vote
2answers
245 views

Linux server not receiving default IPv6 route over PPP link

I'm replacing a pfSense router in a remote office with a small linux device, running Debian. The router only has to handle very basic iptables / DHCP and VPN facilities. It is configured so that the ...
1
vote
1answer
61 views

DHCP server not assigning IPs - Linux (CentOS)

I am having a main issue with the DHCP server. It is not assigning IPs and the dhcp.leases file is increasing in size as it is logging multiple entries for same IP. Started and stopped the service ...
0
votes
1answer
277 views

Debian hangs on startup (NFS Common utilities: statd)

I am trying to configure my debian 6 machine to use DHCP. I have modified the /etc/network/interfaces to only contain: auto eth0 iface eth0 inet dhcp But when I reboot it hang at NFS Common ...
-2
votes
1answer
35 views

AD Server Connection Probem

Ok so i have a Linux server handling the DHCP, and FTP server i have and Network Shares. Then i have a Server (Windows R2) with just the AD. None of the client computers can connect to the Domain. The ...
0
votes
1answer
43 views

Deploying Remote DHCP Servers [closed]

Please don't be too harsh. I'm quite new to the IT world and any advice/solutions would be greatly appreciated. Problem: I want to deploy Cent OS DHCP servers to different remote sites. This will ...
0
votes
2answers
2k views

Getting an IP from an ipv6 dhcp server

I have the following lab: DHCP SERVER [Centos 6] /etc/dhcp/dhcpd6.conf default-lease-time 2592000; preferred-lifetime 604800; option dhcp-renewal-time 3600; option dhcp-rebinding-time 7200; allow ...
2
votes
2answers
226 views

Client DHCP on Linux seems to not be updating Windows AD DNS

I have an odd DNS issue that only sometimes presents itself. I have several Linux machines, running Ubuntu (10.10, 11.10, 12.04). Most of the time they work flawlessly. Sometimes, however, the ...
0
votes
0answers
203 views

How to filter out/disable DHCP NAK responses?

We have some crappy situation where we don't have control over the existing DHCP server on the network and where we need to add another BOOTP/DHCP server with the authoritative directive. Our ...
0
votes
1answer
499 views

Adding static DNS entries on a dynamic BIND setup

I've got a DNS (BIND9) and DHCP (ISC-DHCP-SERVER) setup in which the DHCP server dynamically updates the DNS when hosts grab an IP address. I'm currently resubnetting a portion of my network that's ...
1
vote
2answers
277 views

DHCP issue in our network, could it be hidden 2nd DHCP server?

Something weird happened today. We have a TP-LINK wifi router in our office distributing a pool of IPs 192.168.80-200. There are some windows and some linux boxes. One of the linux boxes (CentOS) ...
2
votes
1answer
45 views

Changing DHCPv6 server

I have a DHCPv6 daemon that is answering for requests of some machines and everything is working fine. So I decided to remove this DHCPv6 daemon e start another daemon on another server, but the ...
1
vote
2answers
140 views

Cannot attach CentOS VMs via DHCP following router swap

I recently swapped out an old Netgear modem/wireless router and replaced with a ZyXel P660HW-T1 supplied by our ISP. I have configured it so that the new router has the same IP address, subnet mask, ...
0
votes
1answer
61 views

DHCP failsafe subnetwork

I have some systems connected via a simple stupid ethernet switch. Under usual conditions, the switch is connected to a large network providing DHCP service and Internet gateway. However, if the group ...
1
vote
1answer
113 views

Difference between DHCP options 'Domain-Name' and 'Domain-Search'

What is the difference between the two? I had thought that domain-name would put the client on the specified domain (ie. If the domain-name was set to "foo.bar" the clients FQDN would be ...
1
vote
1answer
259 views

Setup Network with two ISP

Currently I have a network with 1 ISP, a router/modem, Gigabyte Switch and a server. All the clients PC are automatically assign IP from DHCP server from a Router/Modem A. Server A have a fixed IP ...
0
votes
1answer
177 views

Debian Network boot with a VLAN (DHCP + TFTP)

I've been given 34 servers (HP Proliant) to use for HPC. Due to the server owners' request, 33 of these will need to act as diskless thick clients, and one will act as DHCP and TFTP server to enable ...
2
votes
2answers
134 views

Dhcrelay init.d script runs improperly

I am trying to use dhcrealy on a CentOs 5 kernel which have kernel version 3.5.3. I configured /etc/sysconfig/dhcrelay file like that dhcrelay -i eth1 192.168.0.1 While dhcrealy is stopped, I ...
2
votes
1answer
5k views

how to fix “no free leases” issue in dhcp3?

I am facing no free leases issue. I am building a new server. I have successfully installed ltsp. Then, I configured the dhcp. This is my dhcpd.conf file. option subnet-mask 255.255.255.0; option ...
3
votes
1answer
164 views

Is there any difference running dhcrelay with multiple process or single process?

I want to ask about dhcreay running mechanism. We can run dhcrelay with two command, then it will run as 2 process dhcrelay -i eth3 172.16.17.3 dhcrelay -i eth1 172.16.17.5 #ps ax | grep dhcre 26464 ...
-2
votes
3answers
143 views

No route to host after changing interface to static ip [closed]

I installed a Linux (Ubuntu) server inside my home LAN, initially it's automatically configured to use DHCP interface. I'm connecting to this server from another computer using that server's hostname. ...
2
votes
1answer
172 views

Linux IPv6: DHCP and /127 prefixes

I've tried multiple pieces of DHCP client and software in attempting to setup a solution for allocating a /127 prefix to virtual machines so that each maintains its own layer 2 isolation. Because ...
1
vote
1answer
184 views

Check DHCP Option content

Is it possible DHCP client check the contents of an option ? I need provisioning a Linux server with DHCP option 140 (option-140). But the server behaves as if the DHCP did not contain the ...
4
votes
4answers
139 views

Process for configuring network settings on a headless rack mount device

I'm with a small company that plans to sell a rack mounted network appliance which is configurable via a web interface (think of a router configuration page sort of deal), and I'm wondering in large ...
0
votes
1answer
554 views

How could I fix “No subnet declaration for restart (0.0.0.0)”?

I have a DHCP service installed on my distribution, Backtrack 5 R2 (ubuntu 10.04) and it was working fine, but when I began to configure DNS it suddenly stoped working, how can I make it work again?? ...
0
votes
1answer
78 views

Dediced server for all network functions?

I want to set up a fictional network configuration for a school in my neighborhood. They have about 50 computers altogether, 2X20 in computer rooms for students and another 10 scattered around for ...
2
votes
2answers
929 views

How should I integrate Active Directory with Windows clients and Linux clients and servers

I have Windows and Linux clients and I want to provide Active Directory authentication for both but keeping DHCP and DNS on Linux servers. Is this possible ? I have very little experience in ...
1
vote
2answers
336 views

dhcpd pool exhaustion - What's the result?

I have a DHCP server that serves leases to several houndred, maybe up to a thousand, different clients on an average day. The pool consists of 242 IPs, and due to the highly dynamic nature of the ...
4
votes
4answers
8k views

Force the DHCP server to renew the IP address of a client machine, without doing anything in client machine

I would like to know, if there is a way I could force the DHCP server to renew the IP address of a client machine instantly, without me going to the client machine? In fact, imagine, I don't have ...
1
vote
3answers
233 views

Archiving the dhcpd.lease file

I need to archive the dhcpd.lease file data for legal purposes. I need to retain all the dhcp lease information with the UID from the 1st day. According to dhcpd.lease man page this file is over ...
2
votes
3answers
4k views

DHCP server for multilple VLANs [duplicate]

Possible Duplicate: Can I have multiple DHCP servers on one network? This is a very old question i guess.In this forum itself it has been answered in Multiple VLANs, multiple subnets, ...
3
votes
2answers
2k views

How do I dynamically obtain IP addresses for VLAN interfaces?

I have an Ubuntu machine on which I have created four VLANs, namely eth0.100 ,eth0.200 , eth0.300 and eth0.400. I want to dynamically obtain the IP addresses using the DHCP server. It should provide ...
0
votes
2answers
709 views

ifconfig not reporting DHCP-assigned address

I'm updating the kernel for an appliance, and I've run into a change in how DHCP works. Near the end of my boot script, I check to see if I already have a DHCP-assigned address, and if not, I ...
0
votes
1answer
500 views

Determine the IP address of the DHCP server from a client machine

I would like to know what is the best way to get the DHCP server address from a client (linux based), who just got an IP address from the DHCP server? I searched and found this in most of the ...
0
votes
1answer
129 views

dhcp demon faild to start

I am trying to setup dhcp demon in my CentOS machine. But whenever I start dhcpd, it fails. I don't know the reason. Here is the /etc/dhcpd.conf file. ddns-update-style none; allow bootp; subnet ...
3
votes
1answer
1k views

Ubuntu 12.04 Server static ip configuration

I had some trouble getting the static ip configuration right for Ubuntu 12.04 Server. Every time I would restart the server the nameserver settings in /etc/resolv.conf would get overwritten by dhcp ...