Ubuntu :: Keep Losing Dhcp Settings?
May 2, 2010
i have the minimal install and im having network problems. after connecting and running dhclient i only have internet access for a minute or two before needing to re run dhclient. i tried making it run in cron every minute but my computer kept locking up. what could be causing this?
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Nov 10, 2010
I have an Ubuntu Server 10.04.1 that I have given a static IP address. Every six hours or so I will lose connectivity to it and when I type ifconfig to look at the network information, it has been given an address via dhcp. If I run the /etc/init.d/networking restart command the IP address goes back to my static address and things are fine for another 6 hours or so. Here is what is in my interfaces file:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 10.60.82.15
netmask 255.255.0.0
broadcast 10.60.255.255
gateway 10.60.254.254
This machine is also a DHCP server and I checked to make sure there are no other DHCP servers on my network. Right now my fix is to have a Cron job running that runs the reset command every 5 hours, but I would like to find a more permanent solution.
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Dec 12, 2010
Running 2.6.29-gentoo-r1 on a Sun Ultrasparc 10 with a Sun Happy Meal on eth0 connected directly to my cable modem. Intermittently, with a frequency between a few hours and a few days, I lose internet connectivity. Running ifconfig eth0 indicates all is well and I have a valid IP address but I cannot even ping the cable modem's management address; pings to 127.0.0.1 and eth0's IP address do get a reply but no other address I've tried does. I can 'fix' the problem by issuing
Code:
If I check the CM logs, it appears that it has rebooted itself prior to the loss of connectivity. The strange thing is that the incoming traffic doesn't seem to be affected by this, my PSAD log is full of incoming scans even during the periods when I can't connect to the net. I suspect this is an ISP problem (they own the CM);
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May 6, 2011
I found several threads addressing a similar problem, but neither of the remedies suggested there worked. So I decided to start a new thread. I am using a Dell XPS 15 laptop to connect to a wireless connection at home. I use Network Manager, and it loses all my static DNS settings. For now, I have made a custom /etc/resolv.conf.old and every time I log in, I have to manually do
[Code]...
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Jan 4, 2010
My system (Ubuntu 9.10 Gnome Desktop) keeps 'forgetting' my sound settings. every day I have to go into sound preferences and select a different hardware device setting and then change it back to the right one in order for it to work. For instance my sound goes out of my onboard intel based sound via optical to my amp and so the hardware setting for this is IEC598 output + analog stereo input But everytime I boot their is no sound (and hence no light coming through the optical cable) so then I'll change it to Analog surround and the light comes out so then I can change it back to the 1st setting and it works again. Hope that makes sense, I have had this problem and also my video settings have been 'forgotten' and samba also won't work ever since about 4 days ago when the system updated, everything was working fine before that (i have run update manager since and everything is up to date)
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Aug 2, 2011
I am still running Ubuntu 10.04 still on my laptop and would like to upgrade. Is there a way to do this without losing all my current settings and applications? I guess I'm mostly trying to avoid having to do a fresh install. Also, is there a way to setup my update manager to just prompt me for an upgrade any time there is a new stable version of Ubuntu available?
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Jul 2, 2010
From the GUI, there is an option in the network settings "Automatically obtain DNS information from provider", just wondering how do we set or disable the same option through the command line, which files do we have to modify?
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Nov 18, 2009
After several site:centos.org searches on Google and not finding anything remotely related to this question, I ask, how do I update Firefox 3.0 to Firefox 3.5 without losing any of my settings, history, bookmarks ,etc.?
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Jan 27, 2010
I've been using slackware for many years. I think I started with Slack 8. I know how to configure the network, I've had this same POS Dell computer for a few years now but the other day I tried to go to a different distro (first mistake) everything worked fine but it was not for me. Once you go slack you never go back! Anyway I had slack on here prior to the change and it all worked fine. I'm running slack 13 and all of a sudden my network is slow as balls! I set it up as I always have so I did some research and tried a few things, nothing worked. So i enabled DHCP and its fine now.. I have a dell xps 420. onboard intel nic. worked fine when i first installed slack 13. Anyone have any clue what to do? I would like my static IP on this machine.
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Feb 16, 2011
I'm having mysterious wired network problem with my Karmic/9.10 machine. It hasn't been in network a while, but now I finally got the cabling done. I can't get the IP from dhcp server (TW-EA510), and static settings doesn't work either. Fresh cabling showed OK 1Gb connection on tester, and win7 laptop works fine. I even tried with long cable though the rooms, but it doesn't help, so it definately isn't the new cabling.
Log from the router after issuing #"dhclient":
Feb 16 23:01:43 DHCP SERVER: DHCPDISCOVER from 00:01:29:fb:c5:d1 via br0
Feb 16 23:01:43 DHCP SERVER: DHCP offer to 00:01:29:fb:c5:d1
Feb 16 23:01:49 DHCP SERVER: DHCP request from 00:1b:ea:c8:a0:ba
Feb 16 23:01:49 DHCP SERVER: DHCP ack to 00:1b:ea:c8:a0:ba
Feb 16 23:01:54 DHCP SERVER: DHCPDISCOVER from 00:01:29:fb:c5:d1 via br0
Feb 16 23:01:54 DHCP SERVER: DHCP offer to 00:01:29:fb:c5:d1
Feb 16 23:02:03 DHCP SERVER: DHCPDISCOVER from 00:01:29:fb:c5:d1 via br0
[Code]....
Motherboard is some old Lanparty with two ethernet ports, NVidia CK804 and Marvell 88E800 rev 13 Gigabit netwok adapters, neither of them works. At least another of them has been worked earlier when I last got it wired. It's been a while, so I'm not sure which one of them and with different router if that matters.
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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 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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Oct 31, 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. However I have no idea how this could be setup.
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Feb 8, 2010
first: PXE flawless bind to dhcp address but put next binding state to free second: when installer calls init script to reinit ethernet driver (e1000 (vmware)) binding fails 11.2 opensuse fail to reinit dhcp with log entry "no free leases" third: when manual set network install works how to preserve dhcp lease on reinit of driver?
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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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Jan 31, 2010
Did you play too much with compiz and after-a-while you realize that certain functions are not working anymore?
Well, just follow the steps below:
Quote:
gconftool-2 --recursive-unset /apps/compiz
Then,
Quote:
Restart your PC / lappy
[URL]
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Aug 21, 2011
i have a computer with 3 users on it, and a folder using samba that everyone on the network has access to. Lets say that, the folder is stored in /etc/sharedfolder. What happens is, when user1 puts a folder in it, then logs off, user 2 attempts to modify it and fails, because permission is set to 755, and they are not in the same group. (even if they were, it should still need to be 775) Anyway, my current solution is, every 5 minutes a crontab changes permission like so: chmod 777 -R /etc/sharedfiles && chown useradmin:superadmin -R /etc/sharedfiles Which works, but seeing as there is getting close to a gig in there, this is a bad solution, as it eats up the computers resources. Solutions that i think might work:
1) create a script that only changes permissions that need be changed.
2) change file permission settings to force all documents to inherit parent document settings
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Aug 21, 2010
I am using Fedora 13 x86_64 on a Acer Aspire 7730ZG laptop with: 01:00.0 VGA compatible controller: nVidia Corporation G98 [GeForce 9300M GS] (rev a1) I have kmod-nvidia-2.6.33.6-147.2.4.fc13.x86_64-195.36.31-1.fc13.2.x86_64 installed from rpmfuison when I plug in the hdmi cable to the tv, my tv says the resoultion is at 720p, and I can not get any of the resolutions settings to look right on seperate x screen with the nvidia X server settings gui. my tv is a vizo 42inch. also another question is their a way to set the video card to output at 1080? this might be part of my problem?
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Sep 28, 2010
I have a triboot windows suse 11.3 stable and suse 11.3 factory pc, I would like to share the browsers and email settings between the suse stable and factory, I succeed with thunderbird and firefox moving the /home/.thunderbird and /home/.mozilla in an ext3 shared partition and linking these in the respecive /homes, I found that there isn't a /home/.chromium folder, I found probably /usr/lib64/chromium could be the same as /home/.mozilla for firefox, but I don't know if is secure or can damage my system to move this in a ext3 partition and then link this to the respective /usr/lib64/chromium, /usr/lib64/chromium has root owner, root group, visible and modifiable for root and only visible for group and other.
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Apr 1, 2011
Is there a way I can save system settings and have yast revert to a config file in case I ever need to reinstall the system again? I hate having to configure the firewall, runlevels, samba shares, samba workgroup, apparmor, and all the other junk after every install. It's not like I install often, but should suse 11.5 or 12 roll out, I'd like it to be a snappy upgrade.
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Oct 18, 2009
I am running a debian squeeze machine on a ibm t40 laptop with window maker as my window manager. I am using gpointing-device-settings as a program to get the scroll bar on my touch pad working. unfortunately, I can't get the settings to stick after i shutdown and turn on. I have to go into the program and unclick then reclick the button. i'm using version 1.3.2 (ive tried both deb and source versions). does anyone have any ideas on how to fix this? and if there is any configure files that I could configure instead of having to use the gui program.
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Nov 20, 2010
I have set WAN to 'bridged' mode for my D-Link DSL-G604T so that individual devices can connect directly to the internet.When I connect my computer running Ubuntu 10.04 LTS to the internet via DSL, I lose access to my LAN - e.g I can't login to my modem at 10.1.1.1.This is frustrating because I never had this problem in Windows. Is there a way in Ubuntu 10.04 LTS where I can make it so I still have access to my LAN?
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Sep 19, 2010
I currently have 10.10 32 install but would like to use the 64 bit. Is there anyway for me to update without losing my data? My home directory isn't on a separate partition.
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Oct 17, 2010
Every now and then (that is two or three times a day) the title bar (the one with the exit/minimise/maximise icons on it) disappears from all open windows and any I subsequently open.
The only way to get it back is to reboot.
Not critical, but a nuisance.
Ubuntu 10.10 Fresh install, nVidia drivers activated.
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Jan 18, 2011
I have Ubuntu and mint persistent on a usb for my laptop. I have noticed that all of my free space is gone just from browsing the internet using applications and I can't get it back. I have tried bleachbit but it has only retrieved 150 mb back. Where do a the files go? How do I delete it?
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Jul 25, 2011
This is my first post on Ubuntu, ive been testing/and dual booted then reverted back to windows this past year, and now have gone back to school for computer networking...so im SUPER interested,So - i want to install Ubuntu on my little Toshiba netbook that i drag everywhere with me, but im afraid to screw with it's partitions. I dont want to spend $$$ to get a larger than 8GB flash drive to create a recovery from the HDD partition that is installed on their, and they dont come with the backup/recovery disks, so i want to either leave that partition alone (in case i need to switch it back to windows down the road to sell it), or whatever.
I know i could just download windows to my PC, transfer the files to a flash drive, and put it on that way, but the recovery comes complete with drivers, etc which makes it a smoother and faster process. Oh, i cant make the recovery of windows b/c i need 7.xx GB of space, and my biggest flash drive is an 8GB which doesnt quite make it.SOOOOO - IF i install Ubuntu, will that recovery partition DEFINITELY be left alone? Or is there an easy way someone could suggest copying that partition without a 16GB drive? OR is there any way to use an external hard drive to copy that recovery partition on to?
I have only installed ubuntu once, maybe twice, but didnt care about partitions and wiped everything as requested by the install. (i reverted back because i couldnt navigate quickly installing and updating programs, but now have a windows laptop and want to be forced to learn linux on my netbook).any help is MUCH appreciated! I have an Ubuntu scratch that im dying to itch, but dont want to lose my windows recovery
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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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Jan 18, 2010
if i upgrate my ubuntu 9.04 version to 9.10 will i use my files etc ?? what should i do in that case?
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