Ubuntu Networking :: After A Fresh 11.04 Install DHCP Server Not Working?

Aug 1, 2011

After a fresh install of Ubuntu 11.04 (from 10.04) and spending several hours trying to figure out why the ad-hoc connection between my two computers (Fedora14 <-> Ubuntu 11.04) no longer worked - it had worked fine for almost 2 years with 10.04 - I've finally concluded it was a DHCP problem. This realisation (which was slow in coming!) dawned on me when I reversed my setup and configured the Fedora box as the DHCP server and everything was suddenly working perfectly! A quick internet search threw up an installation file called "isc-dhcp-server" which other Ubuntu 11.04 - related forums are also complaining about. My problem is that this file, although available in the repository, is not even installed!!!

It seems unlikely that the developers forgot to include DHCP support, so I hope someone can point me in the right direction.

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Ubuntu Networking :: Lan Not Working On Fresh Install

Oct 30, 2010

I just installed ubuntu 10 on my pc and unfortunatly I don't have internet. I only have one pc wired to my 2wire modem. I want to use dhcp, no static ip if possible.

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Ubuntu Networking :: Wireless And Ethernet Not Working After Fresh Install Of 9.1?

Sep 16, 2010

I just installed 9.10 to a dell inspiron 531s and neither the ethernet nor the wireless will find a signal. The results of sudo lshw -c network are

*-network
product: BCM4318 [AirForce One 54g] 802.11g wireless LAN controller
vendor: Broadcom Corporation

[code]...

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Ubuntu Networking :: Wired Internet Not Working On Fresh Install 10.10?

May 13, 2011

i have a dual boot system with xp and ubuntu 10.10 (which i recently installed). The internet works fine on my xp but on ubunutu it did not work.

i tried few things, like changing the proxy setting in mozilla firefox etc, but i did not work

i am attaching snapshot of ifconfig, resolve.conf and route-a commands for your referral

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Fedora Networking :: BCM4312 Not Working Under F11 With Fresh Install

Jun 12, 2009

Just tried new Fedora 11 yesterday, did a fresh install with ext3 /boot and ext4 file system, booting looks great, but wireless doesn't work. I have tried using broadcom-wl, dnmouse script, dnmouse broadcom f11 rpm, fwcutter but not ndiswrapper

Code:
# rpm -qa | grep broadcom
broadcom-wl-5.10.79.10-2.fc11.noarch

Code:
# lspci -nn
02:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g [14e4:4315] (rev 01)

Code:
# lspci -vvv | grep 4312
02:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g (rev 01)
Subsystem: Hewlett-Packard Company BCM4312 802.11b/g Wireless LAN Controller
ifconfig only shows eth0, lo and pan0 interfaces, and got nothing from iwconfig...

Code:
# iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
pan0 no wireless extensions.

Even tried to blacklist b43 after installing broadcom-wl driver, but no luck. Broadcom-wl works fine with Fedora 10 on my laptop, is it possibly because of the new ext4 file system? Should I try ndiswrapper or install Fedora 10 again and do a preupgrade? I also use fedora at work.

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OpenSUSE Wireless :: Fresh 11.2 Install - Wifi And Dhcp?

Dec 23, 2009

I just did a fresh install of 11.2 on my Thinkpad (previously running 11.1) and am having trouble with getting wifi to work properly. My wireless will not connect reliably. Sometimes it connects after reboot but then drops and will not reconnect. Below in line 4 of the status query you can see that it says DHCP4 client NOT running.

ifstatus wlan0 wlan0 device: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02) DHCP4 client NOT running wlan0 is up 5: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 00:13:02:4e:66:38 brd ff:ff:ff:ff:ff:ff
Configured IPv4 routes for interface wlan0:
default 192.168.1.1 - -

[Code]...

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Ubuntu Networking :: 10.10 Fresh Install - Wired Network Not Working Properly

Oct 24, 2010

I did a fresh install of Ubuntu 10.10, coming from 10.04 and the wired network connection sometimes works, and sometimes doesn't. Right now I manually removed current network from System-->Preferences--> network connections, define a new one, and reboot. This usually fixes, although I've had to do this two times in the past.

Other general info
Ubuntu 10.10 64bit, EVGA P55 motherboard, on board either net.

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Ubuntu Networking :: Wifi Was Working From Fresh Install But Would Drop Out Often And Sometimes Freeze Laptop Resulting In Hard Reset?

Apr 20, 2010

Using karmic on acer aspire 5332.Wifi was working from fresh install but would drop out often and sometimes freeze laptop resulting in hard reset.Installed Ndiswrapper to try wireless drivers unfortunately i can't get them to work. How can i revert back to original ubuntu drivers?

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Ubuntu Networking :: DHCP Server No Longer Responses To DHCP Requests - Can't Ping Gateway

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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Ubuntu Networking :: DHCP Server No Longer Responds To DHCP Requests - Can't Ping Gateway

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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Ubuntu Networking :: If DHCP Not Available - Fallback And Start DHCP Server?

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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Networking :: Configure A (openSUSE) Client To Dhcp To EBox DHCP Server - Lease An IP Address

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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Fedora Networking :: Ping Working But Internet Not Working From Dhcp Clients

Jul 17, 2009

I have a strange problem for internet. My clients (winxp - S2) can't get internet.Let me explain my scenerios. Fedora 10 with lan (eth0) having direct internet from dsl model, client (XP service pack 2) can use samba shares using dhcp (wlan0) installed in Fedora 10 box. client can ping my linux box.Now problem is: client (dosbox) can ping the google ip address (i.e ping 74.125.39.106) but can't use 'ping www.google.com'. That means ping with ip works for internet from my client. My linux box can. I can use internet from FC10 but can't use iexplorer from my client to have internet. I have enable ipmasquarding in Firewall and dhcpd is running on wlan0 for dynamic ip address of my clients.Can someone suggest me what kind of problem having I? What should i do to success iexplorer for internet? what possibly am i missing?

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Dec 2, 2010

I'm no expert on DHCP. My problem is that i have a CentOS 5.5 server on which i want to install a DHCP server. I have two NICs where eth0 has access to the internet and where eth1 should act as an DHCP server.

I have installed dhcpd and this is how my dhcpd.conf file looks like.

Code:

ifconfig looks like this

Code:

When i start dhcpd on eth1 i get no error messages but when i connect any devices to eth1 they don't get any IP. I cant find anything in any logs about devices trying to get an IP address. I dont have any firewall rules in iptables.

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Ubuntu :: Fresh Install Not Working Correctly

Mar 19, 2010

I just built my PC and loaded ubuntu on it. When the ubuntu desktop comes up everything looks ok. but when I click on any of the drop down menus, or anything else for that matter, the computer freezes immediately. I,ve tried copying the iso boot file to a new cd and reloading ubuntu but the problem remains. I've also tried removing one of the two ram sticks but again, the problem remains.

PC specs:
Intel dh55hc board
Intel i3 cpu 3ghz
2 Corsair 2gb RAM sticks
750 western digital HD
Sony lightscribe DVD drive

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Ubuntu :: 10.10 Fresh Install - Sudo Not Working

Jun 17, 2011

Just did a fresh install of Ubuntu 10.10 sudo not working. This is the message I get.

hewjr@Hewjr:~$ sudo
usage: sudo -h | -K | -k | -L | -V
usage: sudo -v [-AknS] [-p prompt]
usage: sudo -l[l] [-AknS] [-g groupname|#gid] [-p prompt] [-U username] [-u username|#uid] [-g groupname|#gid] [command]
usage: sudo [-AbEHknPS] [-C fd] [-g groupname|#gid] [-p prompt] [-u username|#uid] [-g groupname|#gid] [VAR=value] [-i|-s] [<command>]
usage: sudo -e [-AknS] [-C fd] [-g groupname|#gid] [-p prompt] [-u username|#uid] file ...
hewjr@Hewjr:~$

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Ubuntu Installation :: Fresh Install Not Working Correctly / What To Do?

Jul 2, 2010

I installed Ubuntu 10.04 from a Live CD today. Everything seemed to go fine, I chose to wipe the entire disk. However, it would only startup once. Now, when I turn on my laptop, all I get is a blank screen.

I had a look at my partitions with GParted on the Live CD and noticed that there was a 1 MiB unallocated space just before it. code...

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Ubuntu Multimedia :: Sound Not Working After Fresh Install?

Dec 25, 2010

I just installed lubuntu 10.04 on an old machine and cant get the sound to work. I have been through the sticky but cant seem to see the problem. Heres the useful output:

[Code]...

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Ubuntu :: WiFi Not Working On Fresh Install Of 11.04 (32bit)

Sep 1, 2011

I just got done with a fresh install of 11.04. So far I like the new update and face lift. The only thing I do not like is that I can not use my laptops WiFi I have a Compaq Presario V5101US. Below info is from doing lspci command in the terminal...

Code:
Network controller: Broadcom Corporation BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller (rev 02)
Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)

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Ubuntu :: Sudo Or User Login Not Working - Fresh Install?

Aug 17, 2011

I have this weird problem after a fresh install of Ubuntu 11.04: I can enter desktop using autologin but if i open a terminal i cant run anything as superuser ried:

sudo -i
sudo su
sudo <command>
gksudo <command>

i get somthing like: error, invalid password etc etc 3 incorrect login attemtps Also if i ALT+F2 or close gnome session i cannot login back with my username, same error notes: 1. the password is right, i did a second install of ubuntu to make sure it was not my mistake 2. groups seems ok, user is in admin groups 3. I have a similar error, same computer but on an old installation that i ve updated since ubuntu 9.04 to 10.04, then 11.04 but. But here if i try the password a couple of times then i get it working.

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Sep 1, 2011

I just got done with a fresh install of 11.04So far I like the new update and face lift. The only thing I do not like is that I can not use my laptops WiFi I have a Compaq Presario V5101USBelow info is from doing lspci command in the terminal.Code:Network controller: Broadcom Corporation BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller (rev 02)Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)

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Feb 27, 2011

I had 2 Ethernet ports and neither of them were working on a fresh build a friend was struggling with. After reading the suggestions to fix the issue and thinking that there had to be an easier way I had an epiphany. I would go to my spare parts box and bring out my old Netgear GA311 and pop it into the slot. So after searching for 10 minutes I found it and installed it. Booted up the rig and it found that right away (SWEET) now that's not the fix anybody can do that, once I updated Ubuntu the on-board ports started working (that's what I'm using now). I can't explain what the update did but for a few bucks a used card in the tool box might not be a bad idea!
Mother board is a Gigabyte GAX58A-UD5 Rev.1 Personally I'm an ASUS guy.

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OpenSUSE Wireless :: BCM 4322 On Fresh 11.2 Install, Not Working?

Nov 13, 2009

Newbie here, but I'll attempt to display all the information requested in lwfinger's sticky:

/sbin/lspci yields:
Code:
0c:00.0 Network controller: Broadcom Corporation BCM4322 802.11a/b/g/n Wireless LAN

[code]...

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Apr 8, 2010

I am trying to get custom options to work.

This is my Dhcpd.conf file

This shows that I have 3 custom option in RED.

Now when I try to pull an Ip from the 96.63.0.0/24 subnet I do not see the options in the DHCPACK from the server. The client gets an IP 96.63.0.12 but no options are present in the DHCPACK or any other DHCP transaction. I have confirmed this trhough tcpdumps on the server and client.

The server version I am using is:

The version of the DHCP server is :

Internet Systems Consortium DHCP Server V3.0.6-Fedora

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Jul 12, 2010

I installed dhcp on my Debian server and it was working fine.

untile I restart network with this :

And then dhcp was not working.

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Ubuntu Networking :: Find Gateway - DHCP Server - DNS Server From CLI ?

May 27, 2010

On a remote system, when all you have is the ssh CLI -

How do you find out the ip addresses for:the Gateway
the DHCP server
the DNS server

Don't need to make any changes.

Which commands will display this info?

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Networking :: DHCP Lease Under SuSE Is Not Working., Limited At 10 Minutes?

Jun 22, 2011

I got a strange issue here: We are using ISC DHCP v4 which is default in Open SuSE 11.4. These two options 'default-lease-time' and 'max-lease-time' are set in all subnets, with values between 43200 (12 hours) to 518400 (144 hours). See partial dhcpd.conf below please.Now the lease time from Windows client's ipconfig output is only 10 minutes. Why? (dhcpd on servers restarted many times. ipconfig /release, ipconfig /renew on client run many times)

Code:
lease-file-name "/etc/dhcpd.leases";
default-lease-time 43200; # 12 hours

[code]....

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Sep 1, 2011

Sounds drivers not working properly after fresh install of Natty.

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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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Aug 13, 2011

I have a vps, and the only way to access my vps is using SSH . putty.

After playing around with my vps, learning how certain stuff works and so on, i somehow messed up my server.

Is it possible to do a fresh install remotely using only putty, and nothing else but putty, of my server with centos 5.6?

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