Ubuntu Networking :: Ltsp Server Subnet - Log Clients To The Parent Domain?
Mar 10, 2011
I have an Edubuntu server with two nics joined to the primary windows domain and I can log on with domain credentials and everything is AOK. I used LikewiseOpen 6 to join the server to the primary domain. So, on my Edubuntu server eth1 is connected to the primary domain and has a static IP. eth2 also has a static IP and is the DHCP for the thin client subnet, connected to a switch. IP forwarding is enabled.
DOMAIN - eth1 - Edubuntu Server - eth2 (SUBNET) - switch - clients
So far, so good: I can log on the thin clients with one of the local accounts specified on the Edubuntu server and with that account I can surf the net and, if I supply domain credentials, browse the primary domain. Problem I have is:
I can't work out how to log on to the primary domain with a Active Directory account directly from a thin client. If I try DOMAINuser to log on, after giving the password, the password screen refreshes and 'domainuser@11.*.21.*'s password' appears under the blank password box. The IP in that message is the IP for the subnet and not the primary domain. I feel like I'm miss-understanding some basic simple step but I just can't figure it out.
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Dec 10, 2009
My 32-bit Ubuntu 9.10 [Karmic Koala] LTSP server has two NICs, one with Dynamic IP set by a DSL modem and the other with static IP of 192.168.0.254. I also have 4 thin Clients that boot from this server without any problems and another computer with Ubuntu 9.04 running some PHP programs with dynamic IP given by the same DSL modem. When I send requests to these PHP programs from thin clients, they all give the LTSP server's dynamic IP as their IP so I cannot trace who has sent this request to response back.
I actually know this is logical. Because the requests are sent by a program that's actually running on the LTSP server rather than the thin client. But my question is How can I run a program on a thin client with it's own IP? I also should mention that the dhcp3-server service running on the LTSP server has no conflicts with the DSL dhcp on the network and I know that the 4 thin clients get the IPs ranging from 192.168.1.101 through 192.168.1.104 from the dhcp3-server service. Because I can ping them while they're on. but /sbin/ifconfig on them shows info about the LTSP server.
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Sep 9, 2011
I have tftp-server running on Centos 5. Clients which are on the same subnet as the server are able to get and put without problems. I have a client that is across the internet that is having trouble getting files from my tftp server. A tcpdump reveals that the client is requesting the same file over and over again. In /var/log/messages, I am see the following error repeated over and over until the client finally gives up.
localhost in.tftpd[12727]: tftpd: read: No route to host
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Aug 26, 2010
I use OpenSuse 11.3 and I successfully built a samba/openldap server. However the raoming profiles were not working so I removed the roaming profile part of the samba and the openldap using ldap account manager. I also rejoined a couple of the computers back to the domain successfully (it was not an instaneous join, it took a good minute or 2 to join each pc). Now I cannot cannot login to any of these computers with the domain credentials. I can share using the UNC path no problem and this was working find about 1 week ago.
On 1 of the computers Iw as able to finally get a log file saying this:
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Dec 8, 2010
I've successfully built my server, and any fat or thin client that I connect to it boots wonderfully, with great response. I've gone through this exercise because we need a more efficient way of testing computers before delivery to our customers. So, I'm trying to run Passmark's BurnInTest. I've run it before with previous versions (9.something, I think) and it worked well, but I needed to build a new server so we can test more computers concurrently, so I figured I'd get the latest release.
My problem occurs when I try to run BurnInTest - it must have root access to test the local USB, parallel, and serial ports, and the optical drive. For the previous iteration I used a script that dropped into a local xterm session, su'd to a root session, and called the BiT GUI. In this attempt, the same scripts, even when I single-step them manually, results in 'authentication failure' when the su is attempted.
I have enabled the root account and created a password for it in the chroot /opt/ltsp/i386, and rebuilt the image, multiple times, no joy. Using ctrl-alt-F1 I can log in as root, and using dmesg I can see the USB device register when I connect it, so as far as I can tell the root account is alive and well, just not available in a local xterm session for some reason.
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Aug 26, 2010
On all of my xp clients no matter what the username is is I am continously getting the error saying that the profile cannot be found. I just built this domain recently and since day 1 the roaming profiles have not worked.
here is my smb.conf:
# Primary Domain Controller smb.conf
# Global parameters
[global]
unix charset = utf8
[code].....
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Dec 2, 2010
I have an internal domain (dev.lan) for which my Ubuntu server is authoritative. We have a number of subdomains under that domain (test.dev.lan, svn.dev.lan, etc.). The server also acts as the primary DNS server for my office. It was originally set up under Ubuntu 8 and worked great.
However, ever since we upgraded to Ubuntu 10, our Windows clients periodically lose the ability to resolve domains on the dev.lan domain. Internal IP addresses can still be pinged from the Windows machines so it does not appear to be a network-connectivity issue. External domain names continue to resolve without any problems. The only workaround is to restart networking on the Windows clients. It's frustrating because it happens several times a day.
bind9 logs no obvious error messages.
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Aug 21, 2009
I've got a home server running Ubuntu Server 9.04 and several machines running Ubuntu Desktop (9.04 and 8.04) and Windows (XP, Vista and 7). Now what I want to do is to create a domain and directory server similar in function to Windows Server w/ AD and join my other machines to the domain, but am not sure where to start. I already have file shares with Samba but now I want to setup a domain.
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Aug 24, 2011
i set up an ltsp server on debian squeeze. after a standard installation, sound doesn't work on clients.
[code]...
when i start iceweasel normally (executed on server side), i get sound on the client. when i start ltsp-localapps iceweasel, i get no sound on flash sites and videos videos.what's wrong ? with local apps, is it possible that the flashplugin-nonfree doesn't talk to alsa ?
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Jul 22, 2011
I have TWO L3 + router switch (say switch1 and switch2). I created VLAN100 with VLAN ID 100 in both the switches. I created router 192.168.1.1/24 in Switch1. I created router 192.168.2.1/24 in Switch2. Switch1 is connected with 1.x/24 PCs. PCs are configured with 1.1 gateway. Switch2 is connected with 2.x/24 PCs. PCs are configured with 2.1 gateway. Both Switch1 and switch2 are connected by a trunk to carry VLAN100 data.
1)I have few PCs of 1.x connected to say Switch1 Is it possible for PC with IP 192.168.1.100(x) to ping PC with IP 192.168.2.100(y)?What are the configuration required in both switches to make them communicate ? All the device in both the subnets should ping/communicate with each other.
2)Move PC (192.168.1.100) to switch2. Move PC (192.168.2.100)to switch1.What will happen when PC(1.100) ping (2.100) and vice versa?What will happen when PC(say 1.80 in switch1) pings PC (say 1.100 in switch2) and vice versa? What will happen when PC(say 1.80 in switch1) pings PC (say 2.100 in switch1) and vice versa?
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Jul 4, 2011
I installed Redhat Enterprise linux server5. it has two LAN card and two subnet connected to these two LAN card. i can browse network from these two network easily. But i created VLAN on one network card.Now i cant browse network from these VLAN subnet.
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Nov 17, 2010
I installed in Virtualbox many times and the clients would not connect. The config of the dhcpd.conf was the problem.Now, Everywhere I kept reading it said I had to turn off my hardware routers dhcp. Thats wrong, I have it working with it on and with one network card. Heres the nuts and bolts. Dlink 4100 hardware router assigning address block 192.168.2.200-250 to pcs on the lan. Router is set to reserve and IP for the ltps server nic so it gets the same IP assigned every time from the hardware router. No need to force linux to an ip when it can be set in the router. Then installed LTSP from alt-cd. Once done, dhcp wont run because it conflicts with the hardware dhcp. Found out by trying to restart it and it said stop - Fail when it tried to stop it.
sudo /etc/init.d/dhcp3-server restart
So edit /etc/ltsp/dhcpd.conf.
sudo gedit /etc/ltsp/dhcpd.conf
Mine attached below: The subnet, as long as the 1st three numbers match the rest of lan setup it will work.(192.168.2.0), rest of my lan is 192.168.2.x. Now notice the range is a different block than the hardware dhcp server uses. So all thin clients that connect will be assigned something 192.168.2.100-150 and all hardware connected pcs will be assigned 192.168.2.200-250 from the hardware router. So no conflicts. Then for the domain name server, set it to the hardware router ip. My hardware router is 192.168.2.2. Set option router to the same as hardware router of 192.168.2.2 Nothing in my dhcpd.conf file is pointing to the ltsp dhcp server. Nothing else had to be edited in the dhcpd.conf Next hurdle I had, after any change of the dhcpd.conf, ip's might have changed and you have to reconfig the ssh and the image. run these 2 commands.
sudo ltsp-update-sshkeys
then
sudo ltsp-upadte-image
then
sudo /etc/init.d/dhcp3-server restart
Then thin clients/lan boot pcs all can connect after that.
I have since installed again at work in virtual box, booted from another vbox client and booted from a separate lan pc. Then installed again at home on AMD 3200 Athlon, 1 gig mem. Booted from my main pc PhenomX4, no problems. Pc's must have lan boot available in the bios or net boot available on the network card(most consumer add on cards do not). But most motherboard lan connection do.
#
# Default LTSP dhcpd.conf config file.
#
authoritative;
[code].....
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Feb 12, 2009
Currently have a problem with my LTSP server when using a gigabit switch with a megabit thin client.I am using K12LTSP with Fedora 9.The thin clients get most of the way through booting up then I get error messages saying:nfs: server 172.31.6.1 not responding, still trying.I don't get this problem if I use a 100 meg switch though.I have found several forum posts on the internet which all seem to point to the following webpage with a solution:However, when I make the recommended changes It doesnt make a difference.Below is an example of the default file located at /var/lib/tftpboot/ltsp/i386/pxelinux.cfg with its default settings:
Code:
prompt 0
label linux
[code]....
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May 16, 2010
I've just set up an LTSP server, with all its clients on a separate subnet to my main network - the main network is 192.168.1.x, and the LTSP clients are all 192.168.2.x. My LTSP server has 2 NICs, one on each network, and is merrily forwarding normal IP traffic from the clients to the rest of the network. I have a client/server application that has a server on one machine, and clients locate and attach to it using multicast protocols. The server is on the main network, and any other machines on the network can locate and talk to the server quite happily. The LTSP clients, however, cannot - I assume because the multicast communications aren't being forwarded by the LTSP server. How I can get this working?
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Jun 14, 2009
I would like to setup 2 linux machine each with two ethernet cards, and need to connect to two subnet e.g. 192.168.*.* and 10.0.*.* . If one linux machine out of order, the other will take over all the services(1 httpd and two named(192.168.*.1 and 10.0.0.1 as server ip). What network config is best and easy to failover to other machine?
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Sep 1, 2010
I'm setting up an LTSP server using Ubuntu 10.4 64bit, and PXE connecting with thin clients using Atheros cards. The ltsp environment is 32bit.
Unfortunately I get an error message with "No interfaces found! Aborting..." and a kernel panic early during PXE boot.
After an enormous amount of investigation, I've narrowed it down to (probably) being the fact that the ltsp chroot environment doesn't have the correct driver for my network card (I believe it's atl1c). The correct driver IS available in Ubuntu, though, as I can successfully boot the thin client from both 64bit and 32bit live CDs and bring up the network interface.
how can I install the correct driver in the PXE environment?
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Oct 24, 2010
I've got a bit of a question. My network is laid out like this:
The role assignments are thus:
Firewall - sorts out the passing through to the 3 different networks, and acts as the traffic proxy.
Windows 2003 server - Does Active Directory and DNS
CentOS server - FTP and DHCP
Now, my problem is I need the CentOS server to be able to assign IP address to both networks, however, the CentOS server can *ONLY* be connected via the one interface to the firewall. It needs to assign the Windows 2003 server and the eth0 of the firewall an IP address via static DHCP, but it also needs to able to assign the clients dynamically via any address in the 10.23.1.0/24 range. I was thinking that I would be able to create static only assignments for the servers via their MAC addresses, and only have 1 dynamically assignable entry for the clients, and then get the firewall to allow ports 67 and 68 to flow freely between eth0 and eth1, but I wasn't entirely sure of the best way to do all this.
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Sep 3, 2009
Tutorial for setting up a
domain server, dns server, ldap, mail server, firewall and proxy
with centos and how can I join ubuntu clients to the domain?
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Aug 18, 2010
We've been running samba on linux for a while and everything was fine. All of a sudden when you add new clients to the domain you get the error message :Logon Failure:unknown user name or bad password. This to me seems like a windows error message and not a samba error. When you remove an existing machine (ie on domain) and then try to rejoin it to the domain you fail.
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Feb 3, 2011
Im currently using an english book to setup my samba server, and im having problems understanding it.
I dont want to use root to join clients to the domain; i prefer creating a plain user.
Ok, so, the steps i follow are:
net groupmap add unixgroup=srvadmins ntgroup="Server Admins"
net groupmap add ntgroup="Domain Admins" unixgroup=dmnadmins rid=512 type=d
net rpc rights grant 'ORAServer Admins' seMachineAccountPrivilege
This way, i have a group called srvadmins with permissions to join clients, a group called dmnadmins with permissions to manage users and other permissions, and root.
Now, users: "root", "dmnadmin"(from dmnadmins group) and "srvadmin" (from srvadmins group) can add machines to domain. Root because is root, srvadmin because i granted permissions, and dmnadmin because is admin
So i wonder, why srvadmins group is needed to be granted privileges?
I tryed to lower dmnadmins privileges by revoking semachineaccountprivilege privilege, but didnt worked
net rpc rights revoke 'ORADomain Admins' seMachineAccountPrivilege
looks like its privileges comes from another group and it user managed to add a machine to the domain correctly.
Ok, so, is this really usefull? why do i need 3 kind of users to be able to join to the domain?
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Apr 28, 2010
I feel ashamed for even asking this, since it seems like there's about 3 samba questions here every day. However after an hour of searching, I keep finding strange variants that aren't what I need.
My Goal: Create a single file share on an Ubuntu Server - share it via samba to Windows clients that are on a domain with active directory. It sure would be nice if AD authentication would work - so users don't have to type in a linux user/passsword each time they want to access the share.
In my adventures, I've found the following items (which may overlap)
1. Joining the server to a Windows Domain
2. Turning the server into a Windows Domain Controller
3. Authentication with LDAP (still not quite sure how/what this would do)
4. Stuff with Kerberos
5. Lots of people bickering about Samba 3/4 & how it's impossible to make Samba a PDC.
I'm not sure if I need to make the ubuntu server a domain controller or not...all I want to do is create a file share and share it on the domain...I don't need to make the ubuntu server a domain controller for that, right? Maybe just a member? Maybe nothing at all?
I guess if I want to authenticate stuff correctly (or forward authentication requests? Not sure), I probably need to join the ubuntu server to the domain...I think.
But let's say I do join it to the domain...then how to I create a file share that is authenticated via active directory rather than a local ubuntu server account? I see a dozen guides on joining the server to the domain, but nobody ever mentions sharing the folder over the domain.
The lines are also blurred between joining Ubuntu to the domain and making it a domain controller. What should I keep an eye out to avoid in these tutorials?
I get lost between the Kerberos/LDAP/Samba/WinBind etc...and I have a feeling I don't need all of these for something this simple.
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May 3, 2011
I keep getting a segfault in compiz. I've tried everything! This is from a fresh install without and accelerated drivers (I have ATI)
Quote:
Code:
**Switching to Compiz window management**
/usr/local/bin/compiz-indicator:99: GtkWarning: Can't set a parent on widget which has a parent
menu.append(kill)
/usr/local/bin/compiz-indicator:100: GtkWarning: Can't set a parent on widget which has a parent
menu.append(start)
[code]....
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Feb 28, 2011
i need to configure Redhat Linux as Domain Controller in my organisation, whee all of my clients PC's will be Windows XP or Windows 7 ( where i can login through Domain users ). what exactly i need to configure in Redhat Linux, i heard Configuring Samba as PDC is quite enough ? is that right ? then what is Open LDAP ? should i need to Configure Open LDAP also ?
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Jan 17, 2011
Connection from MANY VNC clients to ONE Server?
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Oct 28, 2010
Code:
DMZ
Server--Router0--Modem0 ISP2--Modem3--Router3--Client3
/
Client1--Router1--Modem1--ISP1--WAN
/
Client2--Router2--Modem2 ISP3--Modem4--Router4--Client4
The Server in the above diagram can be accessed by Client3 and Client4 but not at all by Client1 or Client2. Router0 specifies the Server as a DMZ Host. I would be more specific but this is not my server. I don't use a DMZ, I forward ports when they are needed. In this case I represent ISP1 and the server belongs to a befuddled client. Client1 & Client2 can send packets to each other, no problem. Could the DMZ be breaking communication between the Server and Clients 1 & 2?
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Jan 7, 2010
i have successfully setup PPTPD on my server and I can open a VPN tunnel but my clients can only ping the server's IP, they don't have access to the internet through the VPN.
i have searched different forums and understand that I have to create a route on the server to route packets between the VPN interface and my internet gateway, but I didn't manage to get this work.
here is what my setup looks like:
Code:
root@r31495:~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:1c:c0:c7:13:35
inet addr:94.23.197.XX Bcast:94.23.197.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[Code]....
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Dec 15, 2010
On my server I've a OpenVPN gateway and a DNS bind9 serveur At the moment, OpenVPN send opendns address to the clients and it works fine. I would like to use my DNS server for my clients to work with any DNS address. Here is OpenVPN config :
[Code].....
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Jun 21, 2009
I'm setting up a network for a school. The network has 11 client computers (windows xp) and a server (fedora 10) All I need to do is have a share for all the children to use. (this I did by adding each client to the workgroup specified on samba then I just map the drive). The issue turns out to be that I have over 300 users. The users don't always use the same computer therefore I need the users to be registered on all 11 clients. How can I do this? I have been searching and I've not gotten anywhere. How can I add the computers to a domain instead of a workgroup? What can I use?
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Dec 30, 2010
I'm trying to get a pptp server up and running. The server starts just fine, but encounters errors when a client tries to connect.
Code:
CTRL: I wrote 32 bytes to the client.
Dec 29 23:27:48 frankenstein pptpd[9402]: CTRL: Sent packet to client
Dec 29 23:27:48 frankenstein pptpd[9403]: CTRL (PPPD Launcher): program binary = /usr/sbin/pppd
[code]....
I assume the failed read line is the culprit. I am currently running on a test machine. There is no firewall. I read on this error points to a firewall misconfiguration, but there isn't one.
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Sep 28, 2010
I've been the las 4 days setting up my first VPN (OpenVPN bridged). The server is up and running OK but when I try to connect I've got this message in the client log.
Quote:
TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
TLS Error: TLS handshake failed
[Code].....
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