0
votes
2answers
47 views

DHCP server - No IP for computers out of the domain

I would like to know if there is a way to deny leasing an IP address through my MS DHCP server to computers which are not registered in my domain. Thanks!
0
votes
0answers
4 views

Two IPv4 adapters in same PC on same network valid? [migrated]

Is it valid to have two network adapters on the same PC have the same network portion in their IPv4 address? If not why is my DHCP server doing so and how should I setup my DHCP server to have it ...
-3
votes
1answer
79 views

How can my server announce its presence to everyone in the network [closed]

The situation is as follows. I want to have an application running on a server. All of the desktops in the company has to connect to it. But I do not want the IP address of the server to be hard coded ...
0
votes
1answer
189 views

Using DHCP, is it possible to obtain an IP address & MAC address for a cluster? [closed]

I know that DHCP assigns IP addresses, but does it also assign a MAC address? Is this a commonly used paradigm for cluster/cloud computing? Perhaps DHCP could be used to dynamically assign a new IP ...
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 ...
1
vote
1answer
314 views

Shouldn't we exclude a static IP from the DHCP pool?

In my office, I have a printer with static IP 192.168.0.254/24. Normally, it should be excluded from the DHCP pool in the router. So I just set the DHCP pool to be in the range of 192.168.0.2/24 - ...
0
votes
1answer
256 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
1answer
51 views

Lost as to what I'm not doing in setting up a home lan network [closed]

I'm a PC repair tech and this is a problem I've recently been trying to troubleshoot for a customer. Upstairs they have the main router which servers as the gateway and router, both hardwired and ...
0
votes
2answers
87 views

Controlling 2 DHCP servers in one network

In my customer network, we have 2 DHCP servers. One is fully controlled by me and another by a different vendor. I want to make sure a set of devices (my devices) when connected, should get IP address ...
1
vote
1answer
71 views

Client doesn't get new IP when switching between subnets/locations

So here is our setup. We have 14 locations each with its own subnet and router. The routers at these locations have DHCP relay enabled that points back to our central server that is running DHCP. ...
0
votes
1answer
204 views

Cannot ping gateway

I replaced my aging fileserver with a new server running ESXi 5.1 and migrated my fileserver in a virtual machine running on it. Now I have the following problem with this VM: I'm getting the ...
0
votes
2answers
86 views

How can I get a 2nd IP adress from a DHCP-server

If i use static IP adresses i can use more then one per network card, for exemple i can set eth0 to use 192.168.0.1 and eth0:1 to use 192.168.1.1. And if eth1 get a ip-adress over dhcp, can i somehow ...
1
vote
0answers
36 views

Modems unable to acquire dhcp IPs

I work at an ISP where we use routers (7200) for dhcp. I recently reloaded one of our dhcp routers because we had complaints from many users unable to connect and the dhcp database file it was ...
-2
votes
2answers
71 views

Why APIPA doesn't work with multiple network adapters? [closed]

I connected 3 cameras to 3 network adapters in my PC. I don't have DHCP, so I thought APIPA will do the work. But, camera's installation guide says "If a PC is equipped with multiple network adapters, ...
1
vote
2answers
72 views

Access switch management on network without dhcp

Could not find default IP of cisco router which was static. Issue is now solved see answer below :)
0
votes
0answers
136 views

Configuring HP Proliant iLO using hponcfg

I am configuring an iLO using hponcfg by logging into the machine remotely and running hponcfg with scripts Mod_Directory.xml and then with Mod_Network.xml. I am enabling the DHCP on the device. But ...
2
votes
3answers
858 views

How is DHCP request message broadcasted?

The broadcast address of DHCP request message is 255.255.255.255. Will this request message go through routers? It seems to be yes as the destination address is 255.255.255.255. However, it does not ...
0
votes
1answer
815 views

Adding static DNS entries on a dynamic BIND setup

I've got a DNS (BIND9) and DHCP (ISC-DHCP-SERVER) setup in which the DHCP server dynamically updates the DNS when hosts grab an IP address. I'm currently resubnetting a portion of my network that's ...
0
votes
1answer
278 views

Assign multiple IP addresses in NAT mode to the same VM

I'm aware that VirtualBox assigns the same IP to different VMs (by default 10.0.2.15), however I have a case where I have a VM with a single vNIC, and a Linux namespace inside the VM attempts to get ...
1
vote
2answers
219 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 ...
2
votes
3answers
261 views

Detect alive IPs in an unknown static-IP based network

I ask just in case of curiosity and this is just an imaginary network Imagine an internal LAN network without any DHCP server implemented; So to access the network we should use static IP(s); But my ...
1
vote
1answer
532 views

dhcp same subnet different vlans

I want to setup my work's network so that all wireless clients get assigned a certain IP range but are on the same subnet as the other network devices. Currently I'm running dnsmasq for DHCP and DNS ...
1
vote
1answer
305 views

How to clean up IP's and prevent “ghost hosts” from claiming their IP address?

Background We have about 500 public IP addresses and is about to run dry. Most of the hosts are configured to get the IP from DHCP. But there some that was configured with static IP. The problem ...
5
votes
3answers
451 views

DHCP range starts with 194.77.30. Could that lead to problems?

Just noticed that our Lancom router has a DHCP range of 194.77.30.50 - 150. Could that lead to problems? Because sometimes some devices can’t be reached (with static IPS above that range like ...
1
vote
1answer
1k views

Machine name resolves to wrong IP

I have a machine called server1 (windows server 2008). It was initially set to have an automatically assigned IP by the DHCP server (windows server 2008). It assigned it 192.168.0.180. I changed ...
2
votes
3answers
557 views

Disable static IP addresses on desktop computers

Is there any way of not allowing users to statically set an IP address on their machines? We have a lot of servers with static IP addresses and also a DHCP server. I am afraid of allowing users to ...
0
votes
3answers
662 views

How to bind an IP to a specific switch port with DHCP

I have servers connected to multiple Juniper EX4200 based virtual chassis. In order to make them hot swappable without manual reconfiguration, I would like to be able to always give the same IP, with ...
0
votes
1answer
1k views

Event ID 10020 on my DHCP Server

Every time I restart my server (Windows Server 2008 R2 Enterprise) the following DCHP events appear with the ID 10020 in my event log. I have a static IPv6 address but this event is still being ...
-1
votes
2answers
285 views

DHCP for wireless, fixed for others [closed]

I've run into a situation where I need to have DHCP running for my wireless clients and fixed IPs for everything else. I have absolutely no idea how to do this, tried searching here on serverfault, ...
0
votes
1answer
60 views

Get IP-Adresse of bridged virtual machines

I'm using KVM with qemu/libvirtd for virtualization in my local network. Now I'm working on a script which should simplify the cloning and downloading process of virtual machines. For this I need to ...
0
votes
1answer
2k views

how to detect/Block duplicate/Static IP address on network

i have setup my network using pfsense, having 8 subnets, each one having their own DHCP server range. i have enabled STATIC ARP on the server and static MAC entries, so that no un-known machine can ...
0
votes
1answer
247 views

How to change my domain from 192.168.1.0/24 to 192.168.21.0/24

We are about to start using hosting service for the software we use and they've asked us to change it. I'm sure I can figure out how to change the DHCP scope, but that's not what I'm worried about. ...
1
vote
1answer
74 views

How to Lease a DHCP IP Address for X Number Of Days in Windows 2003 Machine

I have a numerous set of windows servers. The requirement of Fixed DHCP IP Address may vary for each server. One IT Guy may ask like i need this DHCP Address for 30 days and another may say i need it ...
1
vote
1answer
667 views

How do I wire a Windows network? Active Directory/DNS/DHCP Server

I am building a windows based network for my 'medium sized' business and I am only used to linux/mac networks. Any help is greatly appreciated! :) This is the setup I have: T1 from at&t, and a ...
0
votes
2answers
5k views

Hypercom Optimum T4220 POS Credit Card Terminal Fails ISP Test With Successful DHCP lease from a pfsense Netgate Appliance with static IP DSL WAN

This has been an ongoing issue for a couple of weeks. The credit card terminal will lose the ability to connect to the processor server over SSL. The IP config looks correct, the DHCP lease looks ...
0
votes
1answer
131 views

Assign IP to a VM from external DHCP server

When i install a new vm it fetches its IP from the DHCP server already setup when we install kvm. I am maintaining list of vm mac-addresses and there corresponding IPs (that should be assigned) in my ...
-1
votes
1answer
476 views

Why configuring manual IP do not work for me in DHCP? [closed]

I have broadband connection in my laptop. It's getting the IP by protocol. configuration is : ip : 192.168.1.2 subnet : 255.255.255.0 gateway : 192.168.1.1 Now I am curious, In IPV4 properties ...
1
vote
2answers
694 views

Assign a secondary IP address to a Windows machine using DHCP

Is it possible to configure dhcpd (on a Linux box) to assign a Windows PC 2 separate IP configurations? Right now I've configured the two IP addresses manually and it does exactly what's needed, but ...
0
votes
2answers
74 views

Strange IP address behavior

We are having a strange behavior on our company network. From time to time a IP that is given out by the DHCP server "stops" working externally, internal network access is working and DNS lockups is ...
2
votes
3answers
3k views

Why isn't my ip helper-address helping?

I have a hub site with a Cisco 2811 and several remote sites, running a mixture of Cisco 851 and 871 routers configured for site-to-site VPN. I am in the process of adding DHCP scopes and DNS zones ...
0
votes
5answers
3k views

Querying a DHCP server in C#

I have a really large network. Class A network and due to security reasons broadcast and any other PING has been blocked. I want to get all the PC IP that are alive. Is there any way to query DHCP ...
0
votes
4answers
1k views

PCs using certain IP addresses cannot ping out

I'm having a very strange problem which I just can't get past. The way our network is set up, we have 2 locations. The main office with all our PCs, and servers/ We are then joined to a local ISP ...
1
vote
4answers
150 views

Best way to script checking whether a machine is on the corporate network

I am writing a Powershell script to determine if a machine is on the corporate network. The machine may or may not be on the domain, so I want to check at "IP" level. Have written something to check ...
1
vote
3answers
479 views

How can order of IP addresses issued be controlled?

Every home router I've setup/used issues addresses from low to high. However, dhcpd from the Internet Systems Consortium seems to issue addresses in reverse order - ie, high to low. Is there a way ...
3
votes
2answers
341 views

IP assignment in small network

What is the best way to assign IPs in your opinion? I've got ~100 PCs, some servers and see three ways to assign IPs: Static IPs for every PC/server Static IP reservation by MAC-address in DHCP ...
0
votes
3answers
234 views

Proxy server as DHCP

I want to create proxy server which will give different users different ip's. Which instrument I can do it with? eth0 has many aliased ip adresses. Human connecting to the proxy(squid? 3proxy?) must ...
3
votes
5answers
416 views

Why is my eth0 getting a dynamic ip when it is configured to be static?

For some reason our office linux box is being assigned an ip address via dhcp and I don't know why. What is confusing to me is that when I check system-config-network it shows that my eth0 is setup ...
0
votes
2answers
769 views

Some XP clients intermittently getting wrong IP for STATIC IP Server

We have a server with a static IP, let's say x.x.2.5. We have several WinXP (but not all) that will occasionally resolve the hostname to x.x.1.59 (x.x.1.x is the local subnet). The DHCP range in the ...
0
votes
2answers
414 views

DHCP IP address with a client specified DNS server? Is this against spec?

I have some embedded network devices that allow me to specify whether or not they use DHCP. Unfortunately, we have some clients that have less than stellar DNS servers in their networks and have ...
2
votes
5answers
16k views

How to extend IP Range from 192.168.1.1 to 192.168.2.254

Here's my question. I currently have a network setup to have Static IP manually assigned between 192.168.1.1 and 192.168.1.99 and the rest (192.168.1.100 through 192.168.1.254) assigned automatically ...