General :: Query A DHCP Server To Get The Local DNS Servers?
Dec 30, 2010
I have a ClarkConnect (CentOS based) box running as my home router on a RR connection. I had the DNS servers set up to use Google's DNS server. I want to change them back to the local DNS servers but I can't find an obvious/easy way to get those address short of a) reconfiguring the router's network to DHCP them (would rather not interrupt everyone) or b) calling their tech support (kill me now!). Is there a command line tool/command I can use to query the DHCP server on the external NIC to see what DNS servers it would set me up with w/o munging my existing setup?
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Jun 2, 2011
how to configure dhcp server in a local lan network
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Feb 19, 2010
The issue is that my CentOS workstation is in a vlan from where the Intranet's DNS servers are unreachable. For browsing the web there is an ISA proxy server, which I presume resolves DNS for my firefox. However, wget, host, ping and aria2c fail to get any sort of DNS resolution since they're being run from command line.I have exported HTTP_PROXY value, which provides me internet access on console, but,only when I connect using IP address. It fails on name resolution.
My question is:May I redirect the DNS queries to my home PC which would be running a DNS server on a non standard port?I was thinking of putting nameserver 127.0.0.1 in /etc/resolv.conf and then put iptables rule to redirect 127.0.0.1:53 UDP to a.public.ip.address:3535 UDP..I don't know if I am shooting blanks or what, I am not very much aware of this kind of setup.My main need is to provide DNS resolution to console apps.I want to utilize my company's idle bandwidth for bulk downloads, so, using proxy, SSH tunneling through my Home PC is out of question.
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May 19, 2010
We've got crontabs set up in /etc/cron.d to run various things, and we have them running as a specific local user.
Watching the LDAP logs, I can see the servers in question making requests for that username to the LDAP server every time cron runs, even though that user isn't in LDAP and is only local. nsswitch is configured to do "files ldap" as well.
The constant stream of LDAP queries is killing LDAP and making it impossible to log into our boxes.
why cron is querying LDAP for a local user?
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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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Sep 2, 2010
I'm using Net::Bluetooth to create an RFCOMM socket on my Linux box. I need for it to register with SDP with a specific UUID. The perl code can be viewed in this link. I am unable to make the connection from a remote device however. This remote device (my Android phone) is able to connect to other RFCOMM devices using this UUID. I would like to troubleshoot the problem, but I can't find a way to browse the LOCAL SDP records of my PC where the Perl script is running (and waiting for incoming BT connections). how to browse the SDP records on the local PC?
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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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Jul 5, 2015
I recently bought a used Server (FSC RX200 S4) and set it up running Debian 7. Being used to Ubuntu, that was no big deal. It works as it should out of the box. This magic computing machine has four Network cards (eth0 - eth3). Now, I want to set it up as a multi-purpose server. On the one hand, it shall provide a Apache2 webserve, a SQL Server, a File/Streaming Server and so on. I have no problems setting up these.
On the other hand, it should work as a DHCP server in my local lan with some PCs and a printer/scanner. Until now, my cheap router did that job including to connecting me to the internet. Since I can't really set up a proper firewall with that box, I want to use my server for that.
Thats's my desired setup I want to achieve:
[] Router provides internet connection to Server
--> cable goes into eth0
[] Server therefore has a internet connection
--> Some internal magic routes the internet from eth0 to eth1 (preferably as a iptables setup) and does the Firwall & DHCP Service
--> cable goes from eth1 to a switch
--> switch connects the PCs and printer
[] PCs have internet and I can use the printer
So far so good, here's what I've come up with. I installed dnsmasq and isc-dhcp-server. I got some config files for both. I got a script to set up my iptables
Iptables script:
Code: Select all#!/bin/sh
#
# rc.firewall
# firewall with iptables ... stronger version
#
FWVER=0.88s
echo -e "
Loading STRONGER rc.firewall - version $FWVER..
[CODE].....
When starting up the services, I don't see any errors. Still, it doesn't work. My Server loses its internet connection and the PCs connected to the network are unreachable.
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Oct 29, 2010
I set up a DNS server, and it works fine when being queried from other hosts.But if I query it from localhost (by using nslookup), it reports error:
======================================
** server can't find www.example.com: NXDOMAIN
======================================
[code]....
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Apr 26, 2010
basing on the research and trial and error which am still on the trial stage with errors here's the scenario We have 5 VLAN's with and existing Windows DHCP Server, that serves 5 Scopes for the 5 VLAN's 192.168.100.x and 192.168.200.x IP Addressess evrything works well on our Windows DHCP server, what i want to do is replace our windows dhcp server with a linux box , with one NIC , ive read about VLAN on linux 802.xx something and VLAN Tagging am already confused on what to do.. what i want to ask you guys is an assistance implementation the vLAN on linux then the dhcpd.conf
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Apr 1, 2011
I'm curious if anybody can shed some light for me in this department. We're in a large environment with a Windows DHCP Server. We have been tinkering with LTSP on Edubuntu as thin and fat clients. It works great, but right now we just have 1 server handling the lab, which works fine unless we want to expand, which may be very possible.
These are the instructions I received:
Login to your windows server and load the DHCP configuration screen
Create a DHCP reservation for the MAC address you obtained
Add the configuration options below to enable the machine to boot from the LTSP server
017 Root Path: /opt/ltsp/i386
066 Boot Server Host Name: <ip address>
067 Bootfile Name: ltsp/arch/pxelinux.0 # Specify CPU architecture in place of 'arch', for instance 'i386'
From: [url]
I'm curious, what if I want to have multiple Ubuntu servers on the network that I want to have bootable? For example, let's say I have 3 labs, and 3 servers. Server A to Lab A, Server B to Lab B, and Server C to Lab C. I want all C's computers to boot to C, and B to B, A to A, etc.
1 - How would I add multiple entries on the Windows DHCP Server to allow all 3 (A B C) servers to boot?
2 - How would I be able to isolate the clients so ONLY Lab A clients boot to Server A, etc?
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Aug 1, 2009
I have a small office setup all on public ips and was trying to work out the best way to move the wearhouse computers on to private ips and leave offices on public ips I have server with 2 nics and i have two switches What i am after is how to set it up so all computers can still see each other but private can not access net All the office computers via switch 1 Public IPs All the wearhouse computers via switch 2 Private IPs
1 DHCP server
3 Routers from ISPs going to switch one
Both switches going to DHCP Server
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Aug 3, 2009
How to configure DHCP server on Fedora?Is there any package available on Fedora 11 ?
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Dec 29, 2009
In my instructions for LAN boot, I am up to the next step :"You need the DHCP server software. If your distribution has none then you can use dhcp-3.1.3 and compile it."ok, so in F11 Live USB . . . I have downloaded and extracted files - they are still in Download directory . . .
Code:
[root@localhost Download]# dir
dhcp-3.1.3 dhcp-3.1.3.tar.gz
[code]....
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Jul 14, 2011
I am trying to set up a DHCP server for a network that does not go on the Internet using fedora 14. I have tried several site and every one I look at has a different dhcpd.conf file. I have tried many and every time I try to start the service they fail. Like I said it does not go on the Internet. No matter what I do when I try to start the dhcpd service it fails code...
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May 30, 2011
Ive tried on multiple occasions to setup a dhcp server, but all the google searches return legitimate results it seems, and ill set everything up, except the last few instructions i have to configure /etc/dhcp3/dhcpd.conf and /etc/default/dhcp3-server, but ubuntu says its not there.Im running Ubuntu Server 11.04 and using nano to edit files
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Aug 4, 2010
I configured ldap server & client on centos,then i connected centos and suse with network.now want to get group of any user from this server via suse.is it possible with perl scripts? or i need to install other modules on suse or centos?(such as : pam,nss)
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Sep 29, 2010
i have a lucid server box running a dhcp server and webmin.i want to bridge openvpn to the network that the dhcp server serves.all the configurations ive seen, id essentially have to install openvpn onto a computer underneath the dhcp server to accomplish this.
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Feb 23, 2010
I've tried to configure DRBL server to use Clonezilla and that is required me to setup DHCP, TFTP servers.But I've gotten a lot of errors from them - so please look at my attachments from /var/log/messages and dhcpd.conf - help me to find out what are wrong with them.
[Code]...
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Nov 4, 2010
i have a server which was handover me, it has redhat 4 u3.but i cant find the machine model no, it is hp g4 server, so this info from linux where can i see
2nd if i want to know what is the bios version and date how can i see from linux.
3rd if any hardware failing like network card, ram memory, hard disk how we come to know hardware.
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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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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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Apr 4, 2010
I'm establishing a server that runs DHCP server, NAT gateway and VPN server. It have two physical interfaces, one for intranet and one for internet. The NAT gateway will give internet access for intranet. Another site will connect to this server by VPN. I need the server to assign a different subnet for that site other than the local site. Do anyone know how to config the DHCP server? Should I config the client classing, and how to do it?
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Apr 6, 2010
Does anyone have a link to a tutorial on how to set up a DHCP server and SAMBA as a windows domain controller? I can't really find good detailed guides by searching google.
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Feb 14, 2011
turn up the level of logging that my DHCP Server is writing to SYSLOG?I can't seem to find a syslog.conf file to edit.
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Feb 27, 2010
I'm attempting to run a DHCP server on my home network to enable PXE booting for ethernet clients, but I'm having quite a few issues getting it all up and running. I'm not entirely sure what is wrong, but I keep encountering errors in syslog as follows:
Code:
Feb 27 02:26:46 servnerr-1 dhcpd: Wrote 0 leases to leases file.
Feb 27 02:26:46 servnerr-1 dhcpd:
Feb 27 02:26:46 servnerr-1 dhcpd: No subnet declaration for eth0 (192.168.1.3).
[code]....
Networking is not exactly my strong suit, but I would like to get this up and running if at all possible.
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Sep 8, 2011
I have a home network set up that includes windows xp and a local server. DNS resolution allows both machines to access the internet. I know this because firefox works on the xp machine, and yum works on the fedora machine.I can see the server index page through firefox by ip. I can't see it by url.
/etc/sysconfig/network settings:
NETWORKING=yes
HOSTNAME=fred.mycoachdomain.com
[code]....
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Jun 7, 2010
Heres my situation. I have around 30+ systems running Karmic and more coming online everyday. I'd like to be able to have these updated via the local network to conserve net bandwidth. Is it possible to setup a single system which will download updates I specify, then make them available to the other systems on my network via some kind of local repo?
Of course I'm not looking to download EVERY repo, just the essential updates to the core OS. I really just want to eliminate that 45 min/256 file download that takes place each time I install a new system.
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Sep 21, 2009
I 'am trying to set a web server to develop in local website, i follow the guide in server to install php mysql but i 've got this error to set up the password of mysql ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'(2)i'm a noob in linux so i don't know how to resolve it.
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Feb 9, 2010
i have been havin a little trouble with my ftp server im using proftpd and have been able to connect to the box on local lan but it stops with an error about tls packet.
i have been following a guide on settin up my server [URL]...and have attached my config and error details
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