Ubuntu Servers :: Run A DHCP Server On Home Network To Enable PXE Booting For Ethernet Clients

Feb 27, 2010

I'm attempting to run a DHCP server on my home network to enable PXE booting for ethernet clients, but I'm having quite a few issues getting it all up and running. I'm not entirely sure what is wrong, but I keep encountering errors in syslog as follows:

Code:

Feb 27 02:26:46 servnerr-1 dhcpd: Wrote 0 leases to leases file.
Feb 27 02:26:46 servnerr-1 dhcpd:
Feb 27 02:26:46 servnerr-1 dhcpd: No subnet declaration for eth0 (192.168.1.3).

[code]....

Networking is not exactly my strong suit, but I would like to get this up and running if at all possible.

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Ubuntu Servers :: Setting Up Home Server With Backup Imaging For Clients?

Jan 31, 2010

I'm trying to setup a server at home, it has some practical implications, but largely it is just to take a stab at it. But I need the help of someone with more experience than I in defining exactly what I'm looking to do.

Here's what I have: old PC running Gutsy server connected to router. Several laptops at home connected via wifi to router. All laptops running either Windows or Ubuntu. Here's what I'm looking for: The server centralizes file storage for all clients. I would likely incorporate a RAID and some synchronised imaging of the files. I also want the server to create disk images of the clients hdd, regardless of client OS.There would also be some shares that would be publicly accessible (myself and friends accross the country would be able to access the same drive).

So I was thinking something like what corporate environment would be nice, you log into a profile that exists on the server. Like a dumb client...all data would be stored on the server. But I'm thinking that's more like a network boot and wouldn't work via wifi (or would it?). Also that wouldn't lend itself well to laptops used on the road in areas without net access. now I'm thinking each client would have its own locally installed OS, and they would just access networked shares. I could store sensitive files on the shares, but that wouldn't provide complete backup solution for each client.

Without rambling on anymore, anyone care to throw out some ideas? I'm really just looking to see if I can do what I want. The focus is on centrallizing files, securley backing up data and client OS's and ability to restore said images quickly.

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Ubuntu Servers :: Dhcp Lan Clients Have No Internet Access?

Apr 20, 2010

alright so i set up dhcp server and my clients are getting ip's, can ping each other, and can ping/ssh the server. but nowhere beyond that.

however if i ping an externel site, i get its IP addr, but no pings (100% loss)

im ripping my hair out over this. i know that iptables is right, but i dont know about dns

idk if this helps:

Code:
pavel@ubuntu-server:~$ cat /etc/network/interfaces
auto lo br0 eth0 eth1
iface lo inet loopback
#mapping hotplug

[Code].....

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Ubuntu Servers :: DHCP Clients Can't Get Internet Access / Have That?

Jun 21, 2010

I must be very thick as i cannot seem to get my dhcp clients to connect to the Internet properly.
on my lucid server i installed dhcp3 server and bind9, i can ping and dig all on the local network. on the clients however, as soon as i go out of the local network there's messages like "unknown host www.google.com" or "network is unreachable".

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Server :: View The Dhcp Clients Over Dnsmasq?

Jul 23, 2010

Is there anyway how to view the dhcp clients over dnsmasq?

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General :: Windows Clients Not Using NTP Server Provided Via DHCP?

May 31, 2010

I have a network consisting mostly of Windows Vista and 7 clients and an Ubuntu server. The server provides both the DHCP and NTP services through dhcp3-server and openntpd. In my dhcpd.conf, the subnet is declared as follows:

subnet 10.10.10.0 netmask 255.255.255.0 {
range 10.10.10.10 10.10.10.200;
option broadcast-address 10.10.10.255;
option routers 10.10.10.1;
option ntp-servers 10.10.10.1;

The clients don't seem to be using the NTP server though. When I capture the network traffic with Wireshark during the DHCP process, I also see no mention of the NTP option in the DHCP offer message. I am not quite sure if the clients would have to specifically request that option to receive it or if I have to make another configuration to offer the option.

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SUSE :: Dhcp Server Not Routing Its Clients To Internet / Sort It?

Feb 8, 2010

I have setup a dhcp server on eth0, & i have static Internet connection on eth1.
now clients are getting ip automatically, they are able to trace root upto eth0 & eth1.
but i am not able to access Internet from client machines. i am using open suse11 as a server.
i am not able to do telnet & ftp also from client. i am able to access Internet from server.
so please help me to configure my server so that i can access Internet from client machines also.

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CentOS 5 Server :: Use DHCP All Our Clients Use Dynamic IP Addresses For The Ease?

Sep 1, 2010

I'm new to Centos 5 (and Linux) and, after installing Centos, I configured Samba, Apche, ... w/o problems (through interactive interface). My problem is tha t I need to use DHCP (all our clients use dynamic IP addresses for the ease) but I don't find dhcpd ... nor the sample config file(s).

Note : the new server I intend to use is actually connected on a LAN with an 'old' DHCP server (still under W2K server), is this the reason why I can't find/activate dhcp on my new machine ???

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Ubuntu Servers :: DHCP Server And DHCP Client Simultaneously?

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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Networking :: Set A Route For Eth1 - DHCP Clients - To Reach Tun0 - Openvpn Server - CentOS

Sep 21, 2010

I have openvpn tunnel setup between two CentOS servers. One of the CentOS servers also acts as a DHCP server for some client computers.

Server A= OpenVPN server
Server B= OpenVPN client (connects to Server A with OpenVPN)

The two CentOS servers can ping each other (172.16.0.0/24) via the tun0.

However, client computer connected to Server B (DHCP server) can't reach 172.16.0.1 (which is the OpenVPN server).

I think I am missing some routing in my "ip route show". Following is the full picture:

What command can I issue to get this fixed? something along ip route add?

There is no firewall service on both end. service iptables stop! I can't bridge eth1 and tun0 as DHCP server might mess up the other side. I can't do a push of "redirect-gateway def1" because then clients loose their IP as they send DHCP requests to Server A.

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Ubuntu Networking :: Configure Second Ethernet Card For A Dhcp/dns Server?

Mar 2, 2010

i already have an eth0 configured to automatically get its info from dhcp.

but i wanna configure eth1 to be able to serve dhcp and dns. i havent configured either dns or dhcp server on the server box since i have not configured the serving interface.

so far my interfaces file is:

Code:
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet dhcp

[Code]....

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Debian :: Local DHCP Server With Two Ethernet Cards

Jul 5, 2015

I recently bought a used Server (FSC RX200 S4) and set it up running Debian 7. Being used to Ubuntu, that was no big deal. It works as it should out of the box. This magic computing machine has four Network cards (eth0 - eth3). Now, I want to set it up as a multi-purpose server. On the one hand, it shall provide a Apache2 webserve, a SQL Server, a File/Streaming Server and so on. I have no problems setting up these.

On the other hand, it should work as a DHCP server in my local lan with some PCs and a printer/scanner. Until now, my cheap router did that job including to connecting me to the internet. Since I can't really set up a proper firewall with that box, I want to use my server for that.

Thats's my desired setup I want to achieve:
[] Router provides internet connection to Server
--> cable goes into eth0
[] Server therefore has a internet connection
--> Some internal magic routes the internet from eth0 to eth1 (preferably as a iptables setup) and does the Firwall & DHCP Service
--> cable goes from eth1 to a switch
--> switch connects the PCs and printer
[] PCs have internet and I can use the printer

So far so good, here's what I've come up with. I installed dnsmasq and isc-dhcp-server. I got some config files for both. I got a script to set up my iptables

Iptables script:
Code: Select all#!/bin/sh
#
# rc.firewall
# firewall with iptables ... stronger version
#
FWVER=0.88s

echo -e "
Loading STRONGER rc.firewall - version $FWVER..

[CODE].....

When starting up the services, I don't see any errors. Still, it doesn't work. My Server loses its internet connection and the PCs connected to the network are unreachable.

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OpenSUSE Network :: Enable Ethernet At Startup With NetworkManager?

Jan 6, 2010

How can I enable the network with Networkmanager WIHTOUT logging in in OpenSuse 11.2?
If I define a connection for ethernet the System connection is greyed out. I want to use Networkmanager because I have also wireless connections...

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Ubuntu Servers :: Xp Drive Letter - Auto Mount The Server When On My Home Network

Jan 22, 2011

I would like my Ubuntu server to show up as a drive on my XP home machine. I have loaded samba on to the server but I can only get it to show as the printer and faxes under my work group. Also is there a way to have my Ubuntu laptop to auto mount the server when I am on my home network?

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Networking :: How To Resolve Hostnames On DHCP Home Network?

Jun 28, 2010

(although I'm running Solaris, I've posted here as I expect Solaris/LINUX is irrelevant) - more of a general network Q.I have a PC running Solaris 10 (hostname MARKUNIX) and a laptop running WinXP (hostname MARK-LAPTOP). Both are connected to broadband via a router. IP addresses for each are determined via DHCP (192.168.1.nn) and I do not leave either on, 24x7. I am running Oracle on MARKUNIX and want to be able to refer to it by hostname when using Oracle tools on my laptop.Each machine can ping each other ok by ip address and curiously the Solaris PC can ping MARK-LAPTOP (I'm not sure how it resolves that?) - importantly the laptop cannot ping MARKUNIX.Now I could add MARKUNIX to my laptops hosts file but that would mean changing the file each time I boot up as the ip address for MARKUNIX will keep changing (DHCP).

Is there a way to refer to MARKUNIX without having to keep changing ip addresses and use DHCP? As I understand it the 192.168 address is private and is not really the 'real' ip address and as such can be manipulated(fixed?) even whilst using DHCP?Am I right in thinking that a static ip from my broadband supplier is the ip of my connection (router) and I'll still have the same private network referencing issues?What I've covered above pretty much is the extent of my knowledge of networking so bear that in mind please.

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Ubuntu Servers :: Airport Card On A Wireless Network - Couldn't Auto-configure My DHCP Network

Aug 13, 2011

I've installed the Ubuntu 10.04 Server onto a PPC G4 Mac just for the experience of setting up a server. During the installation process Ubuntu couldn't auto-configure my DHCP Network. I'm using the airport card on a wireless network. How can I manually configure the network once Ubuntu is installed.

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Ubuntu Servers :: Windows DHCP Server - Multiple Boot Servers ?

Apr 1, 2011

I'm curious if anybody can shed some light for me in this department. We're in a large environment with a Windows DHCP Server. We have been tinkering with LTSP on Edubuntu as thin and fat clients. It works great, but right now we just have 1 server handling the lab, which works fine unless we want to expand, which may be very possible.

These are the instructions I received:
Login to your windows server and load the DHCP configuration screen
Create a DHCP reservation for the MAC address you obtained
Add the configuration options below to enable the machine to boot from the LTSP server
017 Root Path: /opt/ltsp/i386
066 Boot Server Host Name: <ip address>
067 Bootfile Name: ltsp/arch/pxelinux.0 # Specify CPU architecture in place of 'arch', for instance 'i386'

From: [url]

I'm curious, what if I want to have multiple Ubuntu servers on the network that I want to have bootable? For example, let's say I have 3 labs, and 3 servers. Server A to Lab A, Server B to Lab B, and Server C to Lab C. I want all C's computers to boot to C, and B to B, A to A, etc.

1 - How would I add multiple entries on the Windows DHCP Server to allow all 3 (A B C) servers to boot?

2 - How would I be able to isolate the clients so ONLY Lab A clients boot to Server A, etc?

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Ubuntu Servers :: Install On A Non-DHCP Network?

Feb 8, 2011

I'm trying to install Ubuntu server on an older 05-06 Desktop (IBM) and when I get to the Configuration part it stops right around 95% and the prompt reads that configuration failed do to the fact that my unit is running a non DHCP Network or my machine is two slow. Now it does only have 1 gig in it right now so I'm thinking that might be the problem also. But if it is a DHCP issue how can I install UBUNTU or is it even possible?

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Networking :: 2 DHCP Servers In Local Network

Jun 3, 2010

My router is a DHCP Server.My Access Point is a DHCP Server.I'm wondering if it is really necessary and usefull.Is it possible to get an IP from the Router through the Access Point.For exemple I connect my laptop to the wifi Access Point and the IP is given by the router only.

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Ubuntu Servers :: How To Switch Clients From A Normal Server To A Cloud

Feb 4, 2010

what cloud computing is and i think it can help me with some of my clients i want to switch my clients from a normal ubuntu server to a ubuntu cloud. as of right now i have to send out a bill to them and if they dont pay i have to shut down there service till they pay. what i would like to do is to have a cloud where i can sell them based on what they use not a set price like it is now. and have them be able to pay there bill on the cloud and if they miss the bill then the cloud can shut off there service till its payed.

i dont know if this is possible and i have looked everywhere and all i can find is info on other businesses billing and now how to set up a cloud to do this. i wish there was some kind of tutorial for this. if anyone can direct me to some good notes/tutorials that would be very helpful. this could be a big changing point in my business if i can do this. it would save a lot of time and cash.

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Ubuntu Servers :: Limit The Number Of Concurrent Clients In Ssh Server?

Feb 1, 2011

I am using ssh server to connect to my Ubuntu desktop. I opened the file sshd_config and change my port number of the server.I want to put a limit on the number of clients in the ssh server.

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Ubuntu Servers :: Plugged In The Ethernet - No Network Connectivity?

Jul 14, 2011

I just installed Ubuntu Server, plugged in the ethernet cable, and there is no network connectivity.

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Fedora Servers :: Server And Clients (NFS And NIS) Are In Continuous Attack Via Ssh?

Aug 25, 2009

My server and clients (NFS and NIS) are in continuous attack via ssh. Somebody is trying to guess password and login, and making port 22 busy.What are different ways to stop this attack?I am thinking to block this ip in iptable but I have no good idea because I have not done this before. Any special consideration do I have to take while doing this thing? How is it done and which file does it modify?

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Server :: Adding More Users In LDAP Servers And Clients?

Mar 18, 2011

I installed and configured LDAP server and client on RHEL5 successfully. Problem is that when I add more than one user on server and clients, It shows error 'invalid user'.When I run the command:-#chown -R user:users /home/user, It shows error 'invalid user'. by step for adding and modifying more users in ldap servers.

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Server :: How Clients Handle Offline Syslog Servers

Apr 19, 2011

How do clients handle offline syslog servers?Will the log files be buffered locally to be sent to the syslog server when it comes back online, or will any log data generated during downtime be lost in cyber space?

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OpenSUSE Network :: 11.3 NFS Server - Clients Cannot Connect

Jan 2, 2011

Upgraded two machines to 11.3 in the past 2 weeks. NFS is broken on both, in different ways. The problem I'll mention here is that the nfs server is running, but clients can't connect.

The server is running:
tinderbox:~ # /etc/init.d/nfsserver status
Checking for kernel based NFS server: idmapd running
mounted running
statd running
nfsd running

It has a valid export list:
tinderbox:~ # showmount -e
Export list for tinderbox:
/usr/local/share/common 192.168.1.0/24

The export exists:
tinderbox:~ # ls -lR /usr/local/share/
/usr/local/share/:
total 4
drwxrwxrwx 2 root root 4096 Jan 2 12:10 common

/usr/local/share/common:
total 0
-rw-r--r-- 1 root root 0 Jan 2 12:10 test.txt

But attempts to mount the export are unsuccessful, both from the local machine:
tinderbox:~ # mount.nfs 192.169.1.200:/usr/local/share/common /mnt -v
mount.nfs: timeout set for Sun Jan 2 12:14:19 2011
mount.nfs: trying text-based options 'addr=192.169.1.200,vers=4,clientaddr=192.168.1.200'
mount.nfs: mount(2): Connection timed out
mount.nfs: Connection timed out

...and from an OpenSUSE 11.0 machine.
moira:~ # mount.nfs 192.169.1.200:/usr/local/share/common /mnt/tmp/ -v
mount.nfs: timeout set for Sun Jan 2 11:52:17 2011
mount.nfs: text-based options: 'addr=192.169.1.200'
mount.nfs: Unable to connect to 192.169.1.200:111, errno 110 (Connection timed out)
mount.nfs: mount to NFS server 'rpcbind' failed: timed out, giving up

I've had NFS running on my local network for over a decade, and never had problems like this before.

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Software :: Assign New Gateway When Servers Hosted On Non DHCP Network

Jan 29, 2009

Does anyone know if you switch networks Where you have your servers hosted on a Non-DHCP Network, and you switch your IP addresses, then do you have to switch change/assign your new gateway address? I'm not sure if its manually assigned? How do you do it? Also what about nameserver resolving?

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Ubuntu Networking :: Find Out More About A MAC Address In My DHCP Clients

Mar 8, 2011

I don't really have a reason for this currently. I recognize all the MAC address on my DHCP client list and keep it rather well locked down. I was just wondering if there was something I could run on the terminal to get more information on a given MAC address on my network. Something kind of like whois for websites.

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Server :: SAMBA To Share Network HDD With Permissions To Clients?

Jan 12, 2011

In my work I want to build up a Linux based network, where windows and linux clients are going to share a Thecus network drive.Each client will have specific permissions for accessing the samba shares. I have installed Ubuntu SRV 10.4 with gui and webmin.

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Ubuntu Networking :: DHCP Clients Table In Router Is Dropped

May 23, 2011

when I change the hostname on my Ubuntu server, the DHCP clients table in my router is dropped.I'm running 32-bit Ubuntu Server 10.10. My router is a Linksys WRT54GL with firmware version 4.30.15. I'm changing the hostname by modifying /etc/hosts and /etc/hostname. I've also tried changing the hostname using the Linux hostname command in a terminal, but this does not seem to behave correctly according to the manpages (it does not actually change the hostname, or update either of the aforementioned files).

I've also tried using a different router - a Linksys BEFSR41 - but the DHCP table is still dropped when I change the hostname on my server (although this router is not all that different from my other one).

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