2
votes
1answer
26 views

Two LAN cables when using Remote Access Card?

I recently bought a HP MicroServer N54L and a HP Remote Access Card. Connecting to the server over a KVM viewer for BIOS setup etc. works fine, but when it comes to installing Ubuntu 14.04. the ...
1
vote
0answers
34 views

force dhcp server to always run

I have an Ubuntu machine with two Ethernet network interfaces and on one of them I am running a DHCP server (isc-dhcp-server). I noticed that the server daemon stops running whenever I suspend the ...
0
votes
1answer
30 views

DHCP server hardware [closed]

I have a user who needs to set up a DHCP Server for about 8000 users. Can I set it up on regular PC hardware. So far we have not set it up for more than 200-300 users. Are there anything which I need ...
3
votes
2answers
259 views

Assign fixed IP address via DHCP by DNS lookup

Preface I'm building a virtualization environment with Ubuntu 14.04 and LXC. I don't want to write my own template since the upgrade from 12.04 to 14.04 has shown that backwards compatibility is not ...
0
votes
0answers
76 views

Edge firewall on Ubuntu, dynamic IP address, static DNS

We're setting up a software firewall, and one of the issues we're facing is that eth0 has a dynamic IP address. In /etc/network/interfaces we've got the following: # The loopback network interface ...
0
votes
1answer
124 views

Using isc-dhcp-server to allocate addresses from subnet different from server subnet

I'm trying to break my network into different subnets. Server is located into 192.168.15.0/24 subnet. I have the following declaration in my dhcp.conf: subnet 192.168.15.0 netmask 255.255.255.0 ...
0
votes
1answer
198 views

send message to connected computer when IP obtain from DHCP Server

If a computer running Windows gets a IP address from DHCP Server, how could I send a message to that computer. Say DHCP Server running from Ubuntu Server. I am guessing through SMBClient? Or is this ...
0
votes
1answer
254 views

Add IP address to Ubuntu 13.10 and separate webserver requests

I've got a Ubuntu 13.10 VPS server with 1 IPv4 (111.111.111.111) (and 1 IPv6 address). I recently requested an extra IP address (222.222.222.222) but I can't seem to figure out how to add the new IP ...
1
vote
4answers
2k views

Computer gets IP from DHCP server but has no internet connection

I've installed an isc-dhcp-server on Ubuntu 12.10 and I'm trying to setup a DHCP server on a head node for six worker computers in the local network. The head node itself is a DHCP client receiving ...
1
vote
2answers
780 views

dhclient not working at boot

Here's the problem: root@home:~# ping 8.8.8.8 connect: Network is unreachable root@home:~# dhclient eth0 RTNETLINK answers: File exists root@home:~# ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) ...
0
votes
1answer
178 views

DHCP server on bridged connection

I want to put DHCP server on Ubuntu server to listen on 10.0.0.1 (internal network). I also need to configure OpenVPN server on Ubuntu server (DHCP is going to lease addresses to OpenVPN clients), ...
1
vote
2answers
217 views

How can I configure ubuntu to have a static IP address but still use DHCP for other configuration information?

I want to use DHCP to pick up the network configuration information including DNS, but still assign a static IP address. On OS X, this is "Using DHCP with manual address", but I see no similar ...
1
vote
1answer
1k views

Setting up ISC-DHCP server getting DHCPDISCOVER, DHCPOFFER constantly

Working on trying to setup a new server to run FOG on. I have setup the server to serve DHCP addresses only on eth1 and not eth0. I have installed isc-dhcp and bind9 on the server. I cannot get a ...
0
votes
1answer
1k views

Ubuntu Server 12.04 ISC-DHCP-Server not working using standard configuration

I have been trying to configure the isc-dhcp-server package to assign ip addresses to devices connected to my eth1 adapter. Current Configuration interfaces: auto lo iface lo inet loopback auto ...
2
votes
3answers
6k views

DHCP server for multilple VLANs [duplicate]

Possible Duplicate: Can I have multiple DHCP servers on one network? This is a very old question i guess.In this forum itself it has been answered in Multiple VLANs, multiple subnets, ...
1
vote
1answer
91 views

eth dropping from dhcp loss

I took down my DHCP server to change some stuff, and after bringing it back up (down for 15 mins or so), I noticed that four other Ubuntu 12.04 servers set to use DHCP were unreachable. Running ...
3
votes
2answers
666 views

ubuntu and Avaya Phones

I looked at many articles and can;t quite seem to find an answer that work so here goes. I'm setting up a DHCP server running Ubuntu 12.04 LTS, but I'm unable to get the phones to get an IP address. ...
3
votes
1answer
1k views

Ubuntu 12.04 Server static ip configuration

I had some trouble getting the static ip configuration right for Ubuntu 12.04 Server. Every time I would restart the server the nameserver settings in /etc/resolv.conf would get overwritten by dhcp ...
1
vote
2answers
1k views

Static IP but DNS server from DHCP (Can't use a reservation)

I need to assign the DNS servers to a Virtual Machine via DHCP, but I want the machine to have a static IP address. I cannot use a reservation and go through the usual DHCP process because the VM gets ...
1
vote
1answer
1k views

Does my small network need a domain name?

My question is simple: does a small network need a domain name or do I just leave it empty? Here is the information on what is happening: I have a small network (30+ machines) that includes windows, ...
3
votes
2answers
713 views

Basic networking: Centos Server Router + Ubuntu Client setup.. unable to access outside world from client

I am trying to set up my Centos Server with two NICs as a router. eth0 is connected to the outside world and eth1 is connected to an Ubuntu client. Here's eth0 on the server: DEVICE=eth0 ...
0
votes
3answers
419 views

How to prevent MAC spoofing

I have configured a DHCP server on Ubuntu and a fixed IP address for a specific mac, like this: host client1 { hardware ethernet E0:69:95:73:2C:66; fixed-address 192.168.0.10; } If anyone ...
-1
votes
2answers
3k views

DHCP Relay setup in ubuntu server

I have a network appliance (QNO) that works as traffic load balancer and dhcp server. I would like to add a linux server in between the network appliance and the client computers. The linux server ...
2
votes
3answers
3k views

Configure dhclient to only run DHCPDISCOVER a fixed number of times

I have a server running Ubuntu 11.04, deployed in the field. When someone is debugging the server, they plug eth1 in, but the rest of the time, nothing is plugged into eth1. The syslog is full of ...
0
votes
1answer
443 views

How do I setup Ubuntu interfaces so one interface is “mapped” to another?

I have recently setup a DHCP-Server on an Ubuntu 10.04 server machine. The machine has two interfaces (eth0, eth1). I have the DHCP server setup correctly because computers connecting to the network ...
0
votes
3answers
884 views

Is it possible to setup a DHCP Server for localhost only?

I have a quick question. I have a bunch of VM's (VMWare Workstation) running on a Ubuntu server and have found that VMWare NAT (DHCP) service is unreliable and slow. I have to do use NAT instead of ...
1
vote
1answer
304 views

Ubuntu Server: Acquire an IP from a newly connected DHCP server automatically

I know how to request that a machine to acquire a new IP address, however I've got a slightly different scenario. I have configured a box locally on my network which has DHCP. Therefore, it ...
0
votes
2answers
608 views

Force DHCP server to give a new IP address

i connect to the web via LAN and IPs are assigned via the DHCP server. so a simple sudo dhclient -r sudo dhclient does not work. is there another way to get a new IP address from the DHCP server? ...
0
votes
2answers
242 views

Questions on DHCP server setup

I'm fairly new to networking of this so I have a lot of questions... any help is appreciated. I'm setting up a DHCP server and I've run into a few problems... Here is my current setup: Router IP: ...
0
votes
2answers
131 views

When is it appropriate for a server to handle multiple functions and when should servers be dedicated to a single task?

I have one fairly powerful server running VMware ESXi to allow for multiple virtual machines to handle different purposes. Currently I have 7 set up: PHP Development PHP Staging RoR Development RoR ...
0
votes
4answers
3k views

Ubuntu based VPN server behind NAT router?

I have a small intranet- and file-server inside our company, which can only be reached from inside our own network. I'd like to be able to reach the intranet and files on the server from outside the ...
1
vote
2answers
499 views

Check if IP is static or dynamic programmatically in Ubuntu

I'm trying to determine whether my IP has been statically or dynamically assigned in Ubuntu 11.04 from within C. The closest I've come is examining /var/lib/dhcp/dhclient.leases, but that doesn't ...
1
vote
1answer
709 views

dnsmasq and mac filter

Using dnsmasq as DHCP provider, how is it possible to allow only certain mac addresses to get IP address?
1
vote
1answer
3k views

DHCP request error. Send_packet now permitted, How to debug, What does it mean

I recently installed CSF firewall and have made live a new server which is accepting around 600req/second. Its basically a reverse proxy and I found in pingdom and munin that for a particular time, ...
0
votes
1answer
304 views

NOIP2 process is crashing on start Ubuntu 10.10

I'm configuring my Ubuntu 10.10 box and one of the things that I add to my: /etc/rc.local is a command to start my no-ip.org updater. But, I saw that this process is not getting started up. While ...
0
votes
1answer
423 views

Get DHCP leases from Windows 2003 with a perl script in Ubuntu

I have a Windows 2003 server and need to poll the DHCP lease information from it with a perl script that is running on a Ubuntu server. Then I need to analyze & store the information in a mysql ...
10
votes
1answer
5k views

PXE Booting Virtualbox guests in internal networking mode?

I am not sure if this is just specific to my distro's packages or is a vbox limitation. So, any help would be appreciated. Ok, so I have a network of VMs, with one VM acting as a NAT for the other ...
0
votes
3answers
252 views

Unable to get the ip address of linux PC's(Ubuntu desktop)

We are unable to get the Ip address, I have checked DHCP server we have Ip address available, we can get the Ip address I connect windows system. Please help me to resolve the issue... Thank you in ...
4
votes
6answers
8k views

Command line program to test DHCP service

Is there a simple ping-like command to test whether a DHCP service is running on a network? ...on Linux
2
votes
2answers
415 views

Get IP from DHCP - Ubuntu

apparently someone on my LAN is running his own DHCP server (by mistake i assume) and broadcasting an address (yep it is 192.168.1.155) prevents me to connect to the 'real' DHCP server ...
1
vote
1answer
1k views

Kickstarting an Ubuntu Server 10.04 installation (DHCP fails)

I'm trying to automate the network installation of Ubuntu 10.04 LTS with an anaconda kickstart and everything seems to running except for the initial DHCP autoconfiguration. The installer attempts to ...
2
votes
3answers
376 views

Use wakeonlan by hostname rather than MAC/IP

I'm setting up a cluster and can wake up individual machines with the command wakeonlan -i 192.168.1.255 [MAC Address] I'd like to be able to do this by hostname instead of MAC, but the config ...
1
vote
2answers
3k views

VMWare Workstation w/Ubuntu 10.04 Server: DHCP Issues

Hey all. Bit of a possibly simple DHCP issue with my Ubuntu 10.04 Server (VMWare Guest). When I sudo dhclient eth0 it sends out plenty of DHCPDISCOVERs but doesn't get any DHCPOFFERs back from the ...
0
votes
1answer
1k views

Problems setting up dnsmasq

Its currently set up as follows: # /etc/dnsmasq.conf domain-needed bogus-priv address=/doubleclick.net/127.0.0.1 except-interface=eth0 dhcp-range=interface:eth1,192.168.1.10,192.168.1.127,12h ...
1
vote
2answers
269 views

Linux DHCP 2 networks

I have 2 networks (192.168.1.0/24 & 192.168.2.0/24), and 1 DHCP server. I need to serve DHCP for 2 networks, but it doesn't work. Second network (192.168.2.0/24) ...
1
vote
1answer
2k views

Disable dhcp client over one interface

I'm encountering a problem on a sever with two ethernet interfaces(etho and eth1), it runs linux-ubuntu-server. I need eth1 not make any dhcp request, becouse I need it to be only a listening ...
1
vote
1answer
403 views

Ubuntu server - Problem of routing

I have setup a Ubuntu server with Ubuntu Enterprise Cloud. The server is connected to a private LAN with DHCP and Internet access (via a gateway). At first, the server was working fine. It can ping ...
3
votes
3answers
10k views

How to renew dhcp ip address in ubuntu?

This is a simple question in ubuntu server How do I renew a dhcp assigned IP address?
2
votes
3answers
2k views

Double default gateway ubuntu server

I've just installed an Ubuntu server 9.10 on an EEEBox. This is my /etc/network/interfaces # The loopback network interface auto lo iface lo inet loopback auto wlan0 iface wlan0 inet static ...
3
votes
1answer
7k views

How does my DHCP server know my machine's hostname when I didn't define one in dhclient.conf?

I'm trying to resolve some funky DNS issues related to DHCP on our network (I suspect we have more than one DHCP server running at the moment), and while trying to figure that out, I noticed something ...