Networking :: User Is Connected To Network / But Doesn't Show Up In DHCP Leases
Jul 8, 2010
I have been routing network traffic based on MAC addresses, so we can distribute traffic evenly over a series of WAN IP addresses.Everything seems to be going well, but I have a very curious problem. One of the users can connect to the network without problem, but I don't see him in my network administration application (neither his MAC address or leased IP address).At the same time, I'm trying to identify other unknown computers on my network based on MAC addresses I don't have on file.
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Jan 16, 2009
I have a WET54g bridge that I am trying to get connected to a wireless network that only allows DHCP. The idea behind it is that I would like to connect the Cat6 out of the bridge to a switch allowing multiple wired computers to connect to the wireless network. The bridge will easily connect to the network once I put the WEP key in, however, there is a kink after that. When I connect the Cat6 to my computer and request an IP for that computer, it self assigns. This tells me that it is not talking to the wireless network through the bridge.
I can not find which IP address the bridge was assigned so that I can talk to it. The sub net is 255.255.240.0 which leaves quite a few possibilities. I know that the bridge is, however talking to the wireless network because the light is steady on the front of it which indicates just that. One other thing to stack on is that I know that there is a "splash page" which comes up when any computer connects. You click on the agreement and then you are allowed onto the network. How can I get my computer to talk through the bridge to the wireless network?
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May 16, 2011
is there any tool (terminal command preferably) which can show the frequency and the type of the connected mobile broadband network. I mean HSDPA/GPRS etc and 900/2100MHz. At my country there are 2 frequencies used for UMTS, 900MHz for rural areas and 2100MHz for urban and I need to know what type is the connection and what is the used atm frequency. I am using wvdial for connecting to the internet.
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Sep 13, 2010
I utilize the dhcp server in Debian to hand out IP adressing for around 2500 clients. It works flawlessly except that the lease tables dont seem to release expired leases. I have tried setting shorter lease times with no luck. I can manually delete expired leases.
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Aug 1, 2011
i would like to implement dhcpctl in a program to manipulate dhcp leases. It doesn't work and there are errors at compilation :
/tmp/ccYPRIt5.o: In function `LeaseCleaning(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)':
pxe.cpp.text+0x133a): undefined reference to `dhcpctl_initialize()'
pxe.cpp.text+0x1352): undefined reference to `dhcpctl_connect(__omapi_object**, char const*, int, __omapi_object*)'
[Code]...
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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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Sep 1, 2011
I'm on Windows 7 64bit and Ubuntu 11.04 64bit.Windows is on a net book with not so much hard drive space so I want to keep all my music and movies on my hard drive of my Ubuntu desktop. When I try to find my Ubuntu machine I get nothing though..No matter what though, Win7 simply will not see it on the network. Not even when I run "\ipadress"..If anything is there away to delete everything related to Samba and start over?
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Feb 10, 2010
I deleted all APs in my Wireless Section of network manager. After that, the whole network manager icon disappeared. I added the icon back on the panel, but I don't think its the right one. It doesn't do the two green cicles thing when I connect my ethernet wire in. It also doesn't show any wireless AP when I left click on the icon. It doesn't even have an X mark on the bottom left of the icon when no network is detected
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Jun 8, 2010
im just getting the hang of ubuntu 9.10, and then all of a sudden 10.04 comes over and screws everything up with the upgrade. i did the upgrade, and now the network manager wont show up in notification areas. any clue as to why? help is greatly appreciated. also, my machine does register that the drivers for wireless card is installed, and when i run lshw -c net command with sudo priveleges, it says it can detect networks, so im confused as hell.
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Oct 25, 2010
a friend of mine just given me an old 2004 IBM NetVista 8305 desktop and suggested to use Linux Ubuntu which is something new to me. So i installed it via USB memory stick & it works. After installation of the OS I am impressed with functionality & speed. when i conect the external hard drive via usb it doesn't show & i tried my usb flash disc it showed the same problem. I tried both disk in my laptop (Windows XP) & it works.
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Mar 6, 2011
I had the wrong WPA password.[/blush] It appeared to me that it was connected OK at the physical/datalink level but apparently that was not the case.I've set up an old PC with the latest Ubuntu desktop and am trying to set up wireless networking with a TP-Link TL-WN722N. It only came with Windows drivers but from a thread elsewhere I got it to where it finds my router and connects with the password. However, it doesn't pick up its IP details. The router is working fine wirelessly on my phone and wirefully on my other PC.
I've edited /etc/network/interfaces with "auto wlan0" and "iface wlan0 inet dhcp" but after restart the wlan0 interface has no IP details. Originally the interface had IPv6 details but I cleared that with ifconfig. Under the Network Connections Wireless tab it has "Auto" followed by the name of my wireless connection so it appears to have connected OK. Now when I click Edit for that connection nmame, the IPv6 tab says Ignore and IPv4 says Automatic (DHCP) but Addresses is greyed out and the other fields are all empty.
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Jul 29, 2010
I am using a fully up to date openSUSE 11.3 and today, I decided to upgrade my KDE 4.4.4 to Factory. The update went without a hitch, everything continued to work, including all of the items in my workspace.So now I am running KDE 4.4.95 and it looks nice. I like the new System Settings where the advanced tab is gone and everything is presented in a single window.
The only snag I have hit so far, is that Knetworkmanager no longer displays the network that I am connected to when I right click its icon in the tray. The screenshot may make clear what I am talking about.I am currently connected via a wireless network, which nm-tool confirms. However, it is not shown in the Knetworkmanager menu.
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Mar 10, 2009
i want to resolve the above error. I'm using systemimager to autoinstall system images on pc's connected in lan. while doing this i got the error No DHCPOFFERS received. Also at the time of booting my pc it shows the message No dhcp and/or proxyDHCP offers recieved. But i've started the dhcpd deamon on my pc. Also the systemimager rsync deamon is running. The two pc's are also connected in lan properly.
Still while autoinstalling the image on client it fails showing the error message... No DHCPOFFERS recieved. what do i do in order to make my autoinstall work properly? How do i come to know whether the dhcp server is running or not? What will be the exact problem in autoinstalling?
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Jan 16, 2010
I am relatively new at Linux and am having some problems with an install of openSUSE 11.2. I installed 11.2 on my Thinkpad X31 dual boot with WinXP. It seems to work very well except the network. I looked up swerdna's instructions on setting network cards up. I used YaST to try and set the system up as described in swerdna's instructions. Everything looks fine my network card and wireless card show up in the overview settings screen and everything sets up fine. But when I exit YaST the network doest show up no icon in the system tray and it doesn't even try to connect.
I did go into hardware to see if it was identifying my hardware and my network card shows up as "Thinkpad R40" and the wireless shows up as Cisco Aironet Wireless 802.11b. As far as I know this is correct. I have tried three other distro's and this one has gotten the closest to working so far.
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Dec 30, 2009
I manage to get my mobile broadband working (connected, I mean) in both root & user account. However, my web browser, IM etc only work in root account.In user, knetworkmanager does show that my Huawei E160G is working fine, connected but I still can't surf the net & chat. I've included the dialout & uucp group for user account but that still doesn't resolve the problem
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Apr 7, 2011
I am totally new to Linux and have just installed ubuntu 10.10. After configuring the network interface via dhcp I started getting these messages that come in so frequently I can't configure anything else.
[87.186415] Stack:
Why I am getting this messages and more importantly how do I get rid of them.
The installation is on a VM on Hyper-V.
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Apr 3, 2010
I installed the driver for my network card. iwconfig and ifconfig are all responsive to connecting to the network, I'm given an access point address. Then, I try to connect to a website and no dice. ping www.google.com yields no result. What gives?
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Mar 25, 2010
I updated Firefox today via Yast, since this time it doesn't show any page.I choosed in Configuration no proxy.The sites are empty, nothing just white.I also tried a downgrade to the previous version, didn't help.The Firewall I deactivated for test in Yast, too.A new profile didn't help, starting as administrator either not.
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Dec 19, 2010
I have this little problem: when I open a folder with images from my network drive, I can't see the previews of the files.If the folder is on the local drive no issues, but with the remote one... no luck.I checked around for a solution, without results.. do you know if there is a solution for this little issue
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Jul 21, 2011
I'm attempting to write a web service that works only on my LAN and is not accessible via the internet. I need to restart the DHCP service without granting full root access, but I'm having trouble using the [/etc/init.d/dhcp3-server restart] command. It gives back a failure message that reports nothing:
$ /etc/init.d/dhcp3-server restart
dhcpd self-test failed. Please fix the config file.
The error was:
$
Looking at the script itself, I found the command its trying to execute, and it came back with this:
$ /usr/sbin/dhcpd3 -t -cf /etc/dhcp3/dhcpd.conf
drop_privileges: could not set group id: Operation not permitted
So I went and changed the dhcp: and dhcpd: AND www-data: in /etc/group so that www-data (The apache user) was part of the group, and still the init.d script wouldn't run.
I would prefer to NOT give passwordless access to the www-data user as I do other web services on this machine, however, giving access to stop my DHCP server is a risk I'm willing to take.
how can I restart the DHCP with apache so I can apply changes?
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May 4, 2010
My Lucid-PC runs x11vnc (port 5900) I would like to check with a script, if a user is currently connected to my Lucid-PC via VNC...
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Dec 29, 2010
I have a router with ddwrt on it that runs a DHCP server. What I want to do is only allow people who have pre-determined MAC addresses to get an address to get on my network. That being said I have a VM set up as a DHCP Server. Since doing this I will be setting the dhcp settings on my router to be a forwarder to the VM. Is there a way to allow only static leases in the dhcpd.conf file? I do not just any computer on my network to get an address I want to base it on MAC addresses.
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Mar 11, 2010
I have a dynamic Internet connection. My eth0 is configured to DHCP client. I need to rum one personalized command all time the dhclient renew the lease. I have a program that update the /etc/hosts with the new IP and I need to run this command when dhclient receive one lease update.
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Jan 24, 2010
I have a laptop running 11.2 with an internal Broadcom-based Wi-Fi card that's working fine. I'm trying to get 802.11n going with the WUSB600N. The USB ID on this device is 1737:0079. I believe this means it's a "V2" with an RT3572 chip.
No driver loads for this device when it's plugged in. If I do a "modprobe rt2870sta", a driver loads, and syslog shows "rtusb init" and "usbcore: registered new interface driver rt2870". But ifconfig -a doesn't show a new network interface. I've also tried building the RT3572 driver from the manufacturer's web site. It builds fine, and modprobe will load it, but I get the same results as the rt2870sta driver.
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Jul 17, 2009
I am a convert from Ubuntu (9.04 kept freezing on my laptop; when it did work, many packages it seemed were outdated--ie only Eclipse 3.2, rdesktop was messed up [and apparently is also in Fedora]), and I am having some trouble with getting my wireless working.I am running Fedora 11.First off, there is a problem when trying to connect when using DHCP. NetworkManager gets to the second green dot, and then after a short while I am given a message that the connection was disconnected.
Configuring the interface manually, not using DHCP, allows the connection to complete. However, the internet is very slow. There is a 15-30 sec delay before website loading actually commences, and then another delay each time an ad must be fetched from another server.How can I fix this delay? I know I have encountered it in earlier versions of Ubuntu, but I can't remember how I fixed it.About the rdesktop problem, if anyone is able to help [maybe I should post another thread?], the cursor color (the color of the pointer) is inverted---where it should be white it is black, and where it should be black it is white. I use rdesktop a lot to connect to my terminal server in my basement. Any idea how to fix it?
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Oct 12, 2010
I have an ASUS M4A785-m and it has the Realtek 8112L gigabit nic. The weird thing is, the 10.10 rc saw the nic card just fine, and windows sees the card so it's not disabled in the bios.
Ubuntu says i have no network connections and i need to get internet. Any suggestions?
I should also note that i'm running from the livecd and lspci shows that it detects my NIC. but my NIC isn't "detected" in that it can be used.
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Jul 7, 2009
I have got DHCP issues with Network Manager. Whenever I try to connect using static IP it works, but when I use use Netowork Manager with DHCP, it seems to try to connect and soon says "Network Disconnected"..I've managed to connect to wlan and eth using network, so there shouldn't be any hardware/driver issue.
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Mar 4, 2010
I using ubuntu 9.04. It was connected to the network with the manual IP Settings. Now the server settings have changed and we are supposed to move to Auto Assign IP (DHCP). All the windows machines are working fine, those are connected to network and using internet. But the ubuntu machine is not getting connected. Is there any any additional setting required for DHCP?
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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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Feb 20, 2010
Using debain 5.0.4 with webmin 1.500 and dhcp3.i have two subnets (192.168.1.0 & 192.168.2.0)at home. The debain dhcp server has 1 NIC using eth0 and eth0:1 (virtual).
I have configured the dhcpd.conf file using webmin, with a shared network, given the two subents are on the same physical network. each subnet has a pool of about 20 addresses.Problem is that when a host boots up which is under the 192.168.2.0 subnet (using its MAC add - no fixed ip assignment), it gets the associated DNS and gateway ip addresses for this subnet, however, the ip address is assigned from the 192.168.1.0 address pool.
I have checked the net extensivly finding all sorts of discussions and solutions. My problem occurs in the same manner irrespective of whether i connect a host direct to the dhcp server or via a (netgear) switch! Please can someone advise on what settings i might be missing, or do i need to set up DNS/DDNS and/or a firewall/router before this works properly?
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