DHCP stands for Dynamic Host Configuration Protocol and is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol.

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Workstations connected to SBS 2011 can not connect to “http://connect/” and are getting frequently disconnected or kicked off of the shared drives

Small Office, there are 7 computers and a server running SBS 2011. 2 workstations are not currently bound to the server, because after recently reinstalling windows 7 on them, it was discovered that ...
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15 views

Windows not using manually set IP Address [migrated]

Recently my windows machine that has been working without a problem for over a year decided to start using a dynamic IP address instead of the static one I manually configured it to use. The only ...
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1answer
110 views

Can vSphere PowerCLI cmdlets execute from a PS1 file?

I'm looking to write an admin script that will: Delete a VM from vSphere Delete the VM's DNS entry Release the VM's IP address with our Windows DHCP server I can accomplish the first item via ...
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2answers
52 views

Duplicate MAC address, can be blocked?

Let's say we have DHCP server and provided MAC filtering system. Can we blocked the next spoofed MAC address? The next device will not be leased any IP address. Or normally it is already blocked by ...
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17 views

Commands to extend DHCP range [closed]

DHCP is no longer giving out ip addresses on my network, i'm having to move too many devices to static. From what i gather, it's probably because the pool has been exhausted. I'm not sure about what ...
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3 views

Win 7/8/8.1 create wireless open/WEP network - any possibilities? [migrated]

I have a very old (2003) equipment that has Aironet/Cisco 350 network adapter on board (no WPA/WPA2, only open/WEP authentication). I need to connect it with PC (Win 7/8/8.1) without external access ...
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10 views

how to use isc-dhcp-server in place of router dhcp [migrated]

i have a virtual Debian installed on my VMware running on win 7 64 bit , i am using a bridged connection for my virtual machine , i installed isc-dhcp-server and changed the /etc/dhcp/dhcpd.config ...
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12 views

DHCP relay offer packet dropped

I'm trying to get DHCP relay set up on our Cisco SGE2010P switch. Sadly, we can't afford a catalyst switch right now. It looks like I have everything configured correctly, but something is going ...
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10 views

OpenVZ, veth interface and getting ip from dhcp from the inside of containers

I have OpenVZ server (centos) with one interface eth0, also I have dhcp server in the same network. I need container with ip from dhcp server. So, I created guest node with the veth interface, after ...
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1answer
13 views

AD Dynamic DNS not working with Linux IPv6

I have an AD DNS/DHCP enabled server. I have mixed Windows and Linux machines/servers. IPv4 is working great with DNS/DHCP, even for the Linux systems. IPv6 is working great except that it won't ...
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27 views

Windows Server 2008 reboots when DHCP server is down

I have two Windows Server 2008 servers. Both of them have static ips, both of them are domain controllers. The first one run a server based software, the second one is our dhcp server. Some times the ...
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4 views

IPv6: Cannot reach outside of LAN (OpenWrt Router connected to ISP Router through Wi-Fi) [migrated]

Hello dear server expert, I would like to ask for you help for my installation. I have a Freebox Revolution (I am French and my ISP is Free). The box provides IPv4 and IPv6. Every computer connected ...
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38 views

Assign IP not defined in a subnet range dhcpd [closed]

I look to deploy a DHCP server for a network of VMs that spread over various subnets. The DHCP server will not be used to assign dynamic ranges, but only static IPs based on the host MAC address. Is ...
0
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1answer
22 views

How can a dhcp client in linux can send the dhcp option 60 - specifying the vendor-id?

I am using fedora core machine. My linux- fedora core machine - client wants to send the dhcp option 60 specifying the vendor id to the dhcp server. Next, I want to read the dhcp option 43 send by the ...
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7 views

pfsense router dhcp “periodic error: no ip”

A simple /20 subnet with aprox 300 users. All DHCP. One LAN only Sometimes some of the users report that they get no IP. After minutter or as long as an hour they regain access. Unfortunately ...
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1answer
158 views

Recommended DHCP and DNS setup

I've been tasked with sorting out my office network. Presently there is no internal host name resolution. Presently the DHCP server is on a Cisco security device and we are using an external ...
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1answer
28 views

Is there a way to send out a discovery packet?

Is there a way to make a client send out a DHCP discover packet, but not respond to the DHCP offer packets it gets in response? That way you would be able to check the addresses of all responding DHCP ...
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0answers
49 views

Windows DHCP client only using one DNS server?

I have a PC running Windows 7 professional. It is a DHCP client. The DHCP server is sending it two DNS servers. This has been verified with packet captures. However, after running ipconfig /release ...
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2answers
57 views

Supersede default route

I have two network interfaces eth1 and wlan0. I would prefer all outbound traffic to go through eth1 before wlan0, but if eth1 is not up, and then wlan0 should handle the traffic. Both interfaces get ...
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0answers
40 views

ProxMox Internal DHCP

I'm currently searching for a solution to automate a "cloud" network routing. My hosting company offers me additional IP's for my VPS systems on my Proxmox host and I want to allocate them ...
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1answer
73 views

AWS Override VPC DHCP - Additional Option Sets for RRAS VPN Clients

I am trying to run a RRAS VPN server that pulls from a windows DHCP server running on the same box. I am finding that the AWS DHCP is getting hit first with the DHCP request and it provides invalid ...
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0answers
29 views

Small Office WiFi config for iPhones

I purchased an ASUS RT-AC66u wireless router for use in a small office. I have the router configured as an access point, DHCP is turned off. It is using a static IP of 10.10.10.251. My DHCP server ...
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1answer
58 views

WDS PXE Server occasionally returning bad IP

We have a very complex network boot environment to keep traffic separated for our imaging networks, which process hundred of machines an hour. We use the WDS Server Selection menu tweak ...
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0answers
15 views

DirectAccess Multiple Subnet Deployment

I am looking at doing a DirectAccess rollout on AWS using a single Server 2012 R2 instance behind an edge device. My clients are mostly running Windows 7 Pro/Ultimate, but there will be some other ...
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1answer
98 views

Windows Server 2012: DHCP: Android Clients have no access to the internet

I am using a Windows Server 2012 R2 as Domain Controller, DHCP Server, DNS in my network. My Router is the gateway which is connected to the DSL modem. Some Clients (all android devices) and the ...
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1answer
45 views

Excessive DNS Update requests

I have a curious situation and I can't find any good reason why its happening. Its not causing any noticeable problems, just something I'd like to resolve. From my Server12 dhcp logs, these entries ...
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1answer
38 views

How do I properly configure host server net adapters when using Hyper-V?

I am converting a number of physical servers to virtual ones, and I have a question regarding configuring the physical adapters on the host server. I am new to virtual machines, and have a nagging ...
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1answer
86 views

How can I block all traffic to/from an bridged interface while allowing DHCP?

I have a PC (running Fedora 20) that is being used as a "software switch" to control the network connectivity of some external devices. There are eight such devices; the PC has two 4-port Ethernet ...
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1answer
37 views

How can I implement DHCP so that all users on a domain can get one pool of addresses and the rest get another?

For example, having the domain users/machines on the 192.168.22.x subnet and the rest of the non-domain users and machines are on say, the 192.168.30.x subnet. I'm running Windows Server 2008 and the ...
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5answers
165 views

What happens if ISPs mess up IP allocation?

I've been wondering about this for a long time but never really got around to asking it. I know that a lot of companies were initially assigned IP addresses within the /8 (Class A) range and a lot ...
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1answer
60 views

How to make BSDP NetBoot image selection from a script on OS X 10.9+?

Background: BSDP is Apple's protocol used to discover and make selections on NetBoot servers on the network (Not to be confused with PC-style PXE boot). specs (Word doc). Long story short - it's a ...
4
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2answers
270 views

Can a PXE+DHCP server exist on one network and boot machines on another?

I have a PXE+DHCP server creaed using syslinux and already running on a private network segment (198.19.99.xxx).. I want to know if this PXE+DHCP server can be configured to boot machines over another ...
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48 views

ipv6 address assignment via local server from isp assigned block

I have been looking around and found the information confusing as best. Is there a way to have a server "recieve" the /64 ipv6 block from the isp and then use dhcp or something to assign it out to ...
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1answer
64 views

adding more IP's to my DHCP scope

Our DHCP server is running out of addresses in its range. How can I increase the range? We have Windows Server 2008r2 as a DC\DNS\DHCP server. current scope range 10.220.120.1 - 10.220.120.254 ...
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35 views

DHCP Requests cannot get through Switch

First a little about the network setup: We are a smaller department of a larger school. We have 7 offices with TP-Link managed switches as well as 20 APs and 24 classrooms. The switches, APs and ...
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1answer
133 views

qemu, kvm: Guest: No DHCPOFFERS received

I'm trying to set up a virtual machine (guest) wich should act as router (ubntu 14.04). The host is a CentOS 7 machine (4x LAN). The guest should get a public ip address over it's eth0 (guest), wich ...
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1answer
52 views

Are MAC ID passed via DHCP Relay

Do MAC ID pass through dhcp relay? Even if its connected on the WAN from the internet? So if the DHCP Server is on the WAN of the router and connected to a DHCP server on the internet is it passed?
2
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1answer
53 views

DHCP Relay behind two router

If i have a DHCP Server above two routers and a cleint computer below and the client computer is connected to a router with DHCP Relay, will dhcp pass through those two routers? Here is an example ...
2
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2answers
292 views

VMware ESXi: dynamic registration in DNS fails

I installed an ESXi server 5.5 in our test lab. Everything runs fine, the VMs I host on the server are able to do dhcp and get registered in the DNS. But I am unable to register the ESXi host itself. ...
4
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1answer
837 views

HP Procurve 2920 VLANs with DHCP cannot ping

I have problem setting up working VLANs and DHCP server on HP Procurve 2920. My problem is that I cannot even ping computers between VLANs with static ip addresees. winXP pc on VLAN101 with ...
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0answers
44 views

DHCP Server configuring

I've been configured DNS and DHCP on Windows Server 2012 correctly. But when I open the DHCP server from start menu and server manager, I get different result. When I run DHCP manager from server ...
4
votes
1answer
39 views

Prevent Windows Server 2012 from using DHCP-provided default gateway?

How can I prevent Windows Server 2012's local network connection from using the default gateway provided by a DHCP server? I do not control the DHCP server so the solution must be implemented on the ...
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1answer
79 views

Powershell where-object speed improvement

I want to get a list of my DHCP reservations from my DHCP Server running Windows Server 2012R2. The list should contain the IP, MAC, name, description and the lease status of the reservation (just to ...
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2answers
186 views

How to override the hostname that DHCP configures on a CentOS7 box in AWS? [duplicate]

The title nearly says it all. I have a VM in EC2 running CentOS 7. It uses DHCP, which seems to be a EC2 requirement. DHCP keeps overwriting the hostname on reboot, no matter what I try. I won't ...
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1answer
174 views

How does Bind IP to MAC work? [closed]

A client is connected to the network with a DHCP server, but also has a Bind IP to MAC entry in the router. What is the sequence of steps that determine the final client IP configuration given that ...
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98 views

Internet drops out randomly for short periods of time (LAN issue)

I run a network (I'm just a math teacher) at my school. We get random 10 or so minute periods (I'd guess three a day on average) where the Internet is not accessible from within the LAN. If I go to ...
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1answer
123 views

DHCP reservations for a range of MAC addresses

Question Our DHCP server is set up to only give IP addresses to machines that it knows about (all IPs excluded, reservations for each MAC address). Part of the address range is used for virtual ...
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1answer
33 views

How to get the maximum details from a remote host and forcefully get a particular IP?

I have setup a Ubuntu server(xxx.222.4.216) for our Redmine tool and recently we got a IP conflict in the machine and now im unable to get back the IP(xxx.222.4.216). I would like to know if there is ...
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1answer
345 views

How to configure PXE/Tftp in dhcp.conf on vmware Fusion 7 Pro with static reservations

I'm senior devops engineer with a deployment system to ship a couple thousand linux machines a week. I'm using vmware fusion 7 pro to do this, and I'm having a little trouble with pxe booting. I ran ...
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1answer
218 views

OpenWRT router as a switch with DNS

We have a router (8 ports) that serves our church (it also is our modem with ADSL2 etc) and handles our DHCP services. I've needed to extend our network to accomodate another 2 ports, so an extra ...