Fedora Networking :: LTSP - NFS Server Not Responding?
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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Aug 10, 2011
As i've installed the new fedora update packets ,i've seemed to develope a strange networking problem .. Network description Fedora 15 with 3 LAN adaptors eth0 > LAN (IP address 192.168.0.254)eth1 > network connected to a pppoe conection eth2 > WAN to another provider. Ok so let's ignore eth2 because i've disable mangle(i was using trafic shifting on some ports). So now i'm using it as a simple NAT server .. so the problem is : >>my server is not responding to the traceroute command is it should .. the network works thou but this is what i get. C:UsersDUAL>tracert google.ro
[Code]...
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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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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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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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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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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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Jul 14, 2010
I've got a machine running Ubuntu Server that is on several VLANs. Each VLAN has its own subnet and the server has an address on each subnet. The switches are set to allow tagged traffic to the server for each VLAN that it is on. Switch ports ending with workstations are given untagged ports on whatever VLAN is appropriate. Workstations are given addresses on a subnet for each VLAN via DHCP. All this works great and hosts on any subnet/VLAN can access the server as normal via its address on that subnet/VLAN.
Accessing the machine by its address on a non-local subnet is where I run into a problem. Inter-subnet traffic has to go through a router, which has been set up appropriately. Running tcpdump on the server and pinging it from a workstation on a subnet, using its address on a different subnet, shows the server receives the ping, but sends no response:
Code:
sudo tcpdump -i vlan4 -n
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
[code]...
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Dec 14, 2009
I am getting an var log error while mounting remote file system to the client side as:- Kernel:NFS: Server 10.47.152.70 is not responding, still trying.
The issue is client side machine is getting hang, after i mount the file system.
I have exported the file system as ext3 at the server side using Veritas Cluster. And importing it on the client side by including the shared directory in fstab.
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Jan 7, 2009
I'm attempting to set up a server for performing diskless boots here. I'm using Gentoo 2008, and have followed the instructions here:
[URL]
I've gotten to the end of the basic DHCP setup, and I can not get the server to issue addresses. I've confirmed dhcpd loads up OK, and is running in top.
Here's the contents of /etc/dhcp/dhcpd:
Code:
# Disable dynamic DNS
ddns-update-style none;
# Assume one default gateway for IP traffic will do
[Code]....
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Mar 4, 2011
I am bit new to Linux and have setup caching-only name server with Centos 5.5. when i do dig server, it provide resolutions. but when i use the server IP as DNS on my windows client, it says, "connection refused" on the NSlookup output. (IP table didn't enable) My server Ip is 192.168.1.253 and bellow is the configuration of "/var/named/chroot/etc/named.conf"
options {
listen-on port 53 { 127.0.0.1; 192.168.1.253; };
listen-on-v6 port 53 { ::1; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
memstatistics-file "/var/named/data/named_mem_stats.txt"; .....
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Aug 24, 2010
I have four server :
- the first of them is the router (firewall, htb, squid, etc.)
- the second have installed apache2
- the third sql
- and the last one is LTSP server for 40 client.
When the ThinClient connect to the LTSP server ewerything works good, but i can't see all of them on squid access log. Isee one ip address (LTSP server), but i want to see 40 ip adrresses. The same situation is in htb. It's doesn't work on the thin client. Is there any way to get this work that how i want ?
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Feb 17, 2011
I setup Ubuntu 10.10 (edubuntu) along with ltsp. I have an environment with a windows network (192.168.1.0) and a subnet (192.168.0.0) that the new terminal server is on. Everything seemed to be connecting properly, but when I attempted to boot the first client, I get the error message: "Cannot connect to NBD server".
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Apr 15, 2009
I'm trying to install/configure a LTSP in CentOS 5.3
I have dhcp, nfs and tftp installed, but i can't install/configure XDMCP. I was reading some manuals and "hows to" and all says that, to configure XDMCP, i have to change de atribute "Enable = true" in the file "/etc/X11/gdm/gdm.conf", but i don't have this rute, only "/etc/X11/", gdm folder doesnt' appear :S also... why i can configure XDMCP?
When i run "ltspcfg", he says:
[root@localhost ~]# ltspcfg
ltspcfg - Version 0.11
Checking Runlevel....: 5
Checking Ethernet Interfaces
[Code]....
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Feb 11, 2011
I just bought a old xeon server and am installing ubuntu 10.10 with ltsp, i have also bought 3 thin clients to add to it, what kind of hub or switch do i need to use with it? also is it straight through or crossover cat5 cables that i need? is there any good sites that i should look at for setting this all up, my end goal is to have educational stuff on them for my kids with internet enabled only at certain times, and have movies available from the server for them to watch.
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Jun 25, 2010
I've got a fresh install from the alternate CD. The thin client gets to the point where the screen fills with dots .........done, then it just sits there and does nothing else. No error messages or anything. I have a two nic setup that worked great on karmic and haven't changed any of the hardware around or anything. I'm at a loss as to what to do, I've reinstalled several different times fiddled with every setting I could think of and searched and read till my eyeballs are ready to fall out. It has become a matter of principle to me now and I refuse to go back to an earlier version.
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Jul 22, 2011
I am trying to install and configure LTSP on a server for a HP thin client to boot off. The version of Ubuntu that I am using is 11.04 x86 and it is a fresh install on a dual core system with 2GB RAM. I followed a guide which comprised of these commands.
sudo apt-get install ltsp-server-standalone openssh-server sudo ltsp-build-client or if your on a 64-bit system with 32-bit machines do sudo ltsp-build-client arch i386 for editing the servers IP values use /etc/ltsp/dhcpd.conf after that you need to restart DHCP server sudo /etc/init.d/dhcp3-server restart
and update sshkeys -sudo ltsp-update-sshkeys and if you updated dhcpd.conf then you need to update you image also by typing in terminal ltsp-update-image
Everything seemed to install as it should but when I try to boot from the thin client it just times out and says no DHCP or proxy invites received. I turned DHCP off on the router and even tried another router, but I still get nothing. I am at a bit of a loose end and I hope someone on here can point me in the right direction of where I am going wrong.
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Jan 4, 2010
I am connecting servers using NFS4 the shared directories are on servers running Debian 4 while the one who read from them is Debian 5.0.3. The problem is one of these shared servers suddenly stop responding and you cannot list it from Debian 5 server, also df hang, and the web application that is using it does not respond to requests that use this shared directory since it is blocked. Then the load on the server start to increase until the server cannot respond (over 90). I have found many entries in the syslog that refer to this like:
ma25555 kernel: [1200285.732919] nfs: server 10.xxx.xxx.xxx not responding, still trying
Dec 31 08:16:33 ma25555 kernel: [1200289.815378] INFO: task java:9702 blocked for more than 120 seconds.
Dec 31 08:16:33 ma25555 kernel: [1200289.835249] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
code....
I have tried the connection between the 2 servers using ping for one day and all are OK (zero lost)
There are 3 other servers that are running Debian 4 and are working fine.
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Aug 23, 2010
I have problems with nfs. There is an old legato cluster Automated Availability Manager on Linux. And lately we noticed problem with nfs
in the logs there are still entries:
I tried to add more threads in /etc/sysconfig/nfs but it didn't help.
And on one node there is info regarding double mounted filesystems with df -h command. Why? In /etc/fstab is only one entry.
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Jan 7, 2011
We have a combination of Red Hat Enterprise AS 3.0 and LTSP 4.2. There are 100+ users connected to a single server through Thin Client due to which the server is overloaded and degrades the performance. So I want to know how to install LOCAL APPS on LTSP 4.2 so that I can reduce the load on server.
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Feb 3, 2011
when i want run "ltsp-build-client" command i get this error: ERROR: fc14 is unsupported i want know there is any plan for ltsp 5.2 support in fedora 14 and how i can solve this problem for use ltsp in fedora 14.
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Dec 8, 2010
5.5 (64bit). My server goes into non responding state where I can't telnet, ftp or ssh server whereas PING is the only thing which works at that time. I need to hard reboot server to get it back online. This is happening very frequently in fact yesterday and today server went inaccessible. which log file should I look into to find out the reasons of this inaccessibility?
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Mar 30, 2010
I run this script but it hangs at the nail command like it's expecting a response. how to get it to send automatically?
Code:
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Feb 25, 2011
i m experiencing some problems connecting via ssh two ubuntu workstation: a ssh client and a ssh server The goal of that is to run from local client computer some X applications on the remote server machine
i have configured both client and server for X11forwarding (i think) properly Infact when i launch xeyes on the client i see the X app running
the problem is for all other X apps. For example when i run xclock, nothing happens on the local PC the prompt continues blinking without any reponse, no windows opens and the strangest thing, the shell is stucked. No possible to interrupt with [CTRL]+c the onyl thing to do is close the shell window
Starting in verbose mode (debug), X11 seems works correct , it says x11 confirm as last message .
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Apr 12, 2011
MySQL cluster server refuses to respond.iptables -L shows:
Code:
target prot opt source destination
RH-Firewall-1-INPUT all -- anywhere anywhere
[code]....
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Feb 23, 2010
My DNS server used to work flawlessly but for some reason it no longer responds to queries. It seems that named always queries internet root serves!!
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Feb 5, 2011
I have a Mac G3 and Squeeze 2.6.32-5-686 on an ethernet wired. Works fine with Lenny kde but only in one direction with squeeze kde4. Mac pings squeeze box ok but response is "server may be down or offline". Squeeze connects to Mac normally. Squeeze installed with server option. How do I enable eth0? I need some direction
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Apr 6, 2010
I recently decided to install Ubuntu and I went through all of the steps to set up a subversion server using svnserve. It all works except for one thing: it stops responding to remote computers after a while.I have the server on a 4 port wireless router/switch in my dorm room. I set up port forwarding so that the server receives all traic over the correct ports. The subversion server AND the default http server on Ubuntu work fine always as long as I access them from a computer connected to the switch in my room.The problem is that if I try to access it from anywhere else, it won't respond at all unless it has been accessed by a computer on the switch recently (something like 30-60 minutes). So to fix it I have to go back to my room and access it from a computer on the switch. Then it will work from anywhere for another 30-60 minutes.
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Nov 15, 2010
I have deployed proxy server in my office about a month ago. I have about 7-8 client accessing it through port 3128. After some days of deployment, my server started creating problems. Some clients were not able to access proxy while other clients were accessing it. The error message which I found in cache.log was:
Code:
WARNING: Closing client 192.168.2.99 connection due to lifetime timeout
In this way it was disconnecting clients randomly. The problem resolves when I restart proxy server
Im sending my cache.log file
Code:
Last login: Mon Nov 15 12:37:29 2010 from 192.168.2.2
[root@localhost ~]# cat /var/log/squid/cache.log
2010/11/15 08:11:49| storeDirWriteCleanLogs: Starting...
2010/11/15 08:11:49| Finished. Wrote 57740 entries.
[Code]....
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Apr 24, 2009
after a update to 5.3 from 5.2 via the built in updater the system stops responding to visitors from the outside, http that is, but heres the odd part, if i say run firefox on the server the connection works also for some reason if i'm on the network with my own computer the connection seems to stay open but as soon as i stop using these the server seems to drop the conenctions, but as i said as soon as i go via my comp to the server via say ie it works right away.
this i tried yesterday:did a cold boot to see if some update had problems and actually needed a reboot even if the updater didn't say, after it started the connection seemed to be open for a good while, and not untill this morning from a outside source the connection is droped again, not been on my comp nor logged on on the server today yet.the install only has on it what i got from the dvd, and as far as i know it has all the updates on it since 5.3 came out.my network is built up like this:
modem
|
firewall-switch-computers
[code]....
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