Red Hat :: DHCP Server Reporting Bogus Mac ID While Binding
Jun 18, 2009
I am using using Red Hat Enterprise Linux ES release 3 (Taroon)
dhcp server ver: dhcp-3.0pl2-6.14
I am trying to bind macid 00-21-6B-A1-C9-4C & 00-15-00-1D-AD-57; but it give, when I start dhcp service, I get the following error messages. I am sure macid are absolutely correct. Following the error message I get.
Starting dhcpd: Internet Software Consortium DHCP Server V3.0pl2
Copyright 1995-2003 Internet Software Consortium. All rights reserved.
For info, please visit [URL]
/etc/dhcpd.conf line 2196: Bogus number: 00-21-6B-A1-C9-4C.
hardware ethernet 00-21-6B-A1-C9-4C;
Configuration file errors encountered -- exiting
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Jan 20, 2011
During Slackware 13.1 setup, I chose the hostname stella-sl2. This hostname is also the one that the system is displaying before I configured network access. After configuring wired network access to my Apple Time Capsule, my hostname suddenly changed to INTERFACE='eth0'. As a result I'm noticing some very strange things, like the login prompt which has become "INTERFACE='eth0' login: ".
After configuring wireless network access to the Time Capsule, the hostname changed to "INTERFACE='wlan0'". Note that, during boot, wlan0 is brought up AFTER eth0.
Also strange is this:
bash-4.1$ cat /etc/HOSTNAME
INTERFACE='eth0'.DNSSERVERS='10.0.1.1'
bash-4.1$ /bin/hostname
INTERFACE='wlan0'
bash-4.1$
Until now, it was only a minor annoyance, it didn't prevent anything from happening, internet connection was not affected. But now I'm configuring sendmail which needs to talk to a relay SMTP server, and sendmail "HELO"'s itself using the bogus hostname:
>>> HELO INTERFACE='wlan0'
<<< 501 HELO requires valid address
554 5.0.0 Service unavailable
Probably this is caused by the Time Capsule not adhering to standards. However, the Time Capsule's firmware is the latest version, so I cannot fix this. Is there a way to prevent dhcp from changing the hostname? How can I make sure that the hostname that I configured during setup remains active?
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Jan 27, 2011
I've used NoMachine's NX software for some time, but on one of my machines it simply will not work. At first it did, but now when I log in it authenticates, starts downloading a session, but then drops dead. There is no hint of what the problem may be except in /var/log/messages on the server machine:
User 'bill' from '192.168.1.1' logged out. 'NXLogin::reset'
Notice that it's a login reset, after authentication went fine. Researching this I find the problem is often caused by a missing fixed font, which is remedied with an: # apt-get install xfonts-base --reinstall but that doesn't help. I have completely deinstalled and purged the three Nomachine packages on the server, deleting all associated directories, and reinstalled them, but no help. From my client machine I can log into a NX session just fine, so I'm sure it's not the client machine. The Linux version of this software has a limit of 2 sessions, and I suspect the server may have some bogus sessions open, but where? I've done a purge and deleted /usr/NX and /home/bill/.nx so where else could this be?
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Apr 15, 2011
Today morning I logged on to one of our servers (through ssh -X) to perform a routine maintenance. When I tried to open a GUI application, it failed to connect to the X server of the workstation. Eventually I ended up issuing the command
Code:
df -h /
and shockingly it showed that / is 100% used. I checked / using
Code:
du --max-depth=1 -xh /
to check the sizes of the individual directories, which showed that only about 18% of the / is used and that confused me badly. There was no quick solutions when I googled around; but luckily I found the following link which nicely explained the issue I had:
[URL]
All I did was found out the services responsible for those unreleased files (using lsof +L1) and restarted them. That is it. Now df reports only 18% of the disk is used and all my X things started working again, thanks to Walker.
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Jul 14, 2009
Each time my machine reboots, it takes about 2 minutes for an attempt of the YP server to bind (then it fails).
Code:
jim@LinuxBox:~$ /etc/init.d/nis restart
start-stop-daemon: warning: failed to kill 2469: Operation not permitted
* Starting NIS services
* binding to YP server...
* ....
--> repeats 10 times <--
* .... [fail] [ OK ]
jim@LinuxBox:~$
The previous is a YP server command while running. What happens at boot time is similar. I think I need NIS for my work. This looks like an old common problem (maybe on AMD64 - Ubuntu; which I have). The following link has a good description of NIS and this particular problem. It is a complex problem that I am spending some time working on. It looks like my problem may be that an NIS master has not been created. [URL]. I am trying to share files and run remote desktop with XP machines on a local network. The lack of NIS server may be contributing to my difficulties.
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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 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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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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My query is how to tag Linux server bonding interface what mode I use for bonding in prospective of interface tagging.
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Sep 2, 2010
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Apr 11, 2009
Can I bind 2 interent connections or more on same fedora server to create bigger one with double bandwidth ,or it needs a specific router to be able to do this.
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Jan 28, 2010
I've recently started using the "screen" multiplexer and it is really handy for some cluster work I've been doing. But if I am in emacs and I press C-A to go to the beginning of the line and the C-N to go to the next line, I get shunted to the next "screen" window. I imagine there are other conflicts as well. I did some googling, but all the suggestions showed how to adjust emacs key-binding to accommodate screen. But I don't want to adjust emacs key-bindings because that is the whole reason I like emacs. I think custom "screen" key-bindings go in .screenrc. Does any emacs fans out there who have run into this problem have any .screenrc code they would be willing to share with me that worked well for them?
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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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Jun 3, 2010
I have configured Nagios in my CentOS machine and is able to receive notificatons/alerts related to hosts and services at defined interval. Now I would like to receive combined reports (for daily downtime, availability of hosts/services) for all hosts and services in one go in the morning. Is there any configuration or setting on Nagios Splash screen.
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May 21, 2010
I have a RH 5.5 server which boots from SAN and i use device mapper multipath driver.all the ports are up(see the multipath -ll output below) and i can see all the device but still when i do the multipath command it gives me this output, im wondering whether this is a lvm.conf configuration issue.
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Aug 3, 2009
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Nov 20, 2010
Wierd problem, when I map a Windows Drive to my Ubuntu HTPC Samba share, Windows reports the free space as the free space on my root partition?!!?
HTPC Ubuntu server:
df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 12G 6.5G 4.0G 62% /udev 1.6G 308K 1.6G 1% /dev
[code]....
So my root partition has 4gb free, and my samba share (/mnt/data) has 97gb free.
From Windows machine:
net use
Status Local Remote Network
-------------------------------------------------------------------
OK Z: \xbmcfiles MS Windows Network
[code]....
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Jan 4, 2010
I've got a server running CentOS 4.8 (binary compatible RHEL 4.8 clone) that's decided all the accounts are expired.I've tried this on multiple accounts so far, to no avail.chage -l <username>Shows that the account never expires. In this case the problem was first noticed with the root account, then I tested it with my user account, and got the same answer, the account never expires.For the test I added a crontab to my account, and to roots, ever minute run "whoami"In the log I get (once for each crontab):rond[]: User account has expiredRecycling crond doesn't help, and I can't recycle the box itself as I've got users on it (pounding away at the poor box at that).
Several searches so far have only turned up that locked root accounts (ala debian/ubuntu) can cause this, and check or correct the age of the account using chage.Comparing entries in /etc/shadow to other boxes where everything is kosher doesn't seem to help either: the important bits are identical.
Working box:
kschmitt:$1$QykLetnt$ynSZ.7uKQSRnS3lsYe01w1:14613:0:99999:7:::
Screwie box:
[code]...
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Apr 25, 2011
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i have another problem when i insert my Cd or DVd in DVDwrite on my server and mount him mount /dev/scd0 ---- it dispaly that dev/scd0 does not exist in et/fstab i tried it clicking on DVDWriter Mount but seems error no media,..
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Jun 3, 2009
I want to know how to bind Ip addresses to its mac addresses in Squid Proxy
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Nov 4, 2010
having a weird problem with my wireless connection on a Dell Latitude E6400 laptop.This machine has a Dell 1510 half-card. It uses a Broadcom chipset.I've gotten to the point where fedora sees the card, and I can create wireless connections. But every time I try to connect to a network, it scans, connects, and disconnects several times, until it gets a completely bogus IP address, that has nothing to do with any of the networks onnect to. It is always "10.42.43.1", yet I have no static configuration for that address.
Code:
# lspci|grep -i wireless
0c:00.0 Network controller: Broadcom Corporation BCM4322 802.11a/b/g/n Wireless LAN
[code]....
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Dec 2, 2010
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Code:
Dec 2 16:10:55 Ubuntu-904-jaunty-64-minimal postfix/qmgr[7685]: E95C2B48DB4: from=<HappyShopping@somedomain.nl>, size=1912, nrcpt=1 (queue active)
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[Code]...
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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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I'm trying to set up a PXE boot server on a PC running Slackware 13.0 using the default apps and info shipped with that Slackware version but to no avail...Carefully reading the Slackware 13.0 README_PXE I've put together this dhcpd.conf file:
# dhcpd.conf
#
# Configuration file for ISC dhcpd (see 'man dhcpd.conf')
[code]....
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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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I have come across this option given below in dhcpd.conf file for DHCP Server configuration. Can any body let me know what this option is all about.Code:option T150 code 150 = string;
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