Questions tagged [dhcp-server]

A DHCP server is a program to hand out Dynamic Host Configuration Protocol leases.

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Cloned Ubuntu VMs in vSphere get same IP, despite resetting /etc/machine && /var/lib/dbus/machine-id

vSphere 7.0 + Ubuntu 18 / 20 (tried both) I am trying the steps from this blog post: https://blah.cloud/kubernetes/creating-an-ubuntu-18-04-lts-cloud-image-for-cloning-on-vmware/ I also tried this ...
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Will Multiple Routers (Using Split-DHCPs for IP grouping) for Smart Home separation cause problems?

I'm reconfiguring my home Wi-Fi & I'm trying to find the best way to deal with my Smart Home devices. I have ≈70 Smart Home devices, from a Google Home Mini in each room, Smart thermostat, smart ...
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Issues trying to set up a Windows 10 PC as a DHCP server

I have a situation where I have a Windows 10 PC that is acting as a DHCP server on a private network with no internet connection. The PC has a second ethernet adapter that is connected to the internet ...
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Linux Router Middlebox Failing to Initialize Internet Connection

I'm trying to configure a Linux machine as a "middlebox router" that allows a connecting client machine to use the internet connection of the machine itself. It has two physical ethernet ...
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DHCPD v6 binding state is always active and never switch to expired

In my dhcpd6.leases file, all my IPv6 addresses given by my DHCPv6 server (isc-dhcpd-4.4.2) stay in binding state active forever. Even when I shutdown the client. In theory, the old leases should ...
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PC connected to repeater router cannot connect to DHCP server on main router

I have a home network comprising of: TP-Link Archer C2 (V1), functioning as an Access Point (Wifi and LAN internet): DHCP server is enabled IP is 192.168.0.1 TP-Link Archer C2 (V3), which is setup as ...
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ISC DHCPD: Dynamic IP Range for all Members of Class matched by Hardware Address

I have a DHCP server (Version: isc-dhcpd-4.3.5) running on Debian and managing multiple subnets, all running on virtual interfaces eth1:1, eth1:2, etc. over the same physical interface eth1. All ...
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How to exclude specific ip in wide-dhcp6s server

I am using wide-dhcp6s server in Linux based device.My problem is i want to exclude specific IP in dhcpv6 pool. My IPv6 pool ranges between 2001::1 to 2001::A i want to exclude IP address 2001::5 i ...
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How do you view DHCP servers within VirtualBox?

I set up a DHCP server within VirtualBox long ago and I wish to remove it. The VBoxManage dhcpserver does not have an option to list the servers -- only remove, add, or modify. I can't "tab" ...
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how can i access device on dhcp server from outer net

i made DHCP server on rpi with following settings: for interface eth1: interface eth1 static ip_address=192.168.1.1/20 static routers=192.168.1.0 and for dnsmasq.config interface=eth1 bind-interfaces ...
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Virtualbox dhcp server not able to find vm to assign ip address

I have been trying to run two virtual machines using Oracle Virtualbox. virtualbox is able to assign ip address to one vm, but showing error for the second vm. Tried to get the ip address of the two ...
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Is it possible to configure Sonicwall TZ350 to provide DNS for DHCP clients?

I've got a SonicWall TZ350, and I've set it up to provide DHCP to a local LAN (192.168.168.X). Right now, when a DHCP client on the local lan does nslookup of another client, it fails because the name ...
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How to disable windows desktop 10 hotspot's dhcp server?

I am connected via ethernet to a router which gives me an IP via dhcp. I want to share that dhcp of the real router via wifi of my laptop to devices around. My plan is to bridge ethernet and wifi, get ...
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Are there no DNS entries for static pi-hole dhcp hostnames?

A pi-hole instance is also acting as the DHCP server in my network. I assigned static IP addresses for some of my devices (eg. an octopi server with Hostname "octopi" and IP address "...
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Windows 10 "dhcpsrv" for hotspot - No internet / disconnect

I want to setup a dedicated hotspot in Windows 10. The "share network" is activated and seems to work as well. However, when connecting to the created WiFi with my Phone (Android 10) it got ...
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Hyperactive DHCP and related issues

I have a simple home network - modem --> Nighthawk router --> D-Link 24 port switch --> bunch of clients (including three Ubiquiti APs - nobody uses the router wifi at all). I put the ...
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Cannot receive IP from router bridge

I have a "router" that is basically a computer with 4 network ports and Linux Centos installed that I will be calling Centos-Router from now on. My operator cable router is configured with ...
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Is there a way to know what public ip addresses my pc had last months or year?

Is there a way to know what public ip addresses my pc had last months or year ? Are they saved somewhere ? Thanks in advance
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DHCP Options in VMware Fusion

I tried to get my DHCP server on vmnet2 to include an option for a particular host, so I added this configuration below the "DO NOT MODIFY SECTION" block in the relevant config file (/...
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router is assigning a different private ip address for my intranet

I have a rog ag11000 router setup as the main router, and also have a DDWrt linksys router connected to it via lan cable and configured to work as an extender (DHCP server off). The gateway ip address ...
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Can a DHCP Client tell the DHCP Server not to hand him a specific IP address?

I have a device that has two ports and one always requires static IP address "X". The other port can be connected to a LAN for internet access. Is it possible that when that port is ...
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Can I configure my Windows 10 PC as a DHCP server on a local switch?

I'm creating a local network that I would like to have DHCP capability. I have a primary Windows 10 PC that will be on the local network full time. Is it possible to configure this PC as a DHCP server ...
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Multiple interfaces match the same subnet - how to fix this?

I have a raspberry pi 2 with a lan interface (eth0) and wan interface (wlan0)- usb wifi adapter. My OS is raspbian. I want to use my raspberry as a wifi AP. So, it is necessary to have a ics-dhcp-...
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Configuring DHCP for Windows 10 Network Installations

While following a tutorial for PXE booting a Windows 10 Installation Media, the requirements mention using a DHCP server to do what seems to me to be intercept the DHCP broadcast and instead assign ...
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How can I reserve a static IP address for my PC on a TPLINK Wireless N ADSL2+ Modem Router?

I am trying to add a static IP address for my PC. I have tried to search on Google, and I got on this page on TP-LINK official website. Unfortunately, the screenshots in the article shows a very ...
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Does a DHCP server really check for conflicts using "ping"?

I read the following excerpt in a CCNA prep book and it doesn't sit well with me: So during IP address assignment, a DHCP server checks for conflicts using the Ping program to test the availability ...
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How should a dhcp server allocate only one ip address?

How should I configure the dhcpd.conf file so the DHCP server would allocate only one IP address from a subnet to the first VM that is connecting to the DHCP server? Thank you. Operating system: ...
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how to setup IPv6 ULA advertisement and -DHCPv6 in home network?

I am on ArchLinux, and I am running IPv6 in my local home network. IPv6-Internet comes with my fritz.box and works well with all clients. On my home server, I set up radvd to advertise my local ULA ...
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DHCP packets cut off after configuring VLANs on switch

I initially set up my switch taking inputs from my router, modem, and all network devices... and quickly found that was a bad idea when I tested DHCP results and found I was getting responses from the ...
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Netplan/DHCP Config: Forwarding requests from one bridge port to another

im trying to configure a bridge network on Ubuntu 20.04. There are 4 ethernet ports in the brige. This is how the corresponding netplan config looks like: network: version: 2 ethernets: ...
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Configuring ASUS Router to use custom Bind9 and DHCPd on LAN

Let’s say I have a Raspberry Pi set up to be a client on the network and I want it to use 192.168.2.2 while the router uses 192.168.2.1, what’s the necessary router configuration to use the Pi’s dhcpd ...
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DHCP issues with two wireless APs and two different SSIDs on the same network

I have a small home network with a pfSense router running DHCP and DNS, as well as other services. This is directly connected to the internet via a modem, and then the other side connects to a switch. ...
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DHCP Lease time renewal with ISP

Recently my ISP had a major outage and since they came back up I have been having issues with DHCP leases. I am currently using a DLink router with FreshTomato and there were no such issues before ...
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DHCP reservation is active but user's laptop has a different IP

I am learning how to use Windows Server 2016. I created a Server 2016 and Windows 10 client in Oracle VM, set up AD DC, DHCP server and created a reservation for a client. The client computer is in AD ...
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Ubuntu PCs are unable to configure with IP address from DHCP server

We are trying to setup VLAN network in our institute. We have Cyberoam firwall (Model CR300iNG) where we have configured VLAN and DHCP server. When we connect any Ubuntu PC over VLAN network it is ...
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5 answers
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Can a computer running a DHCP server assign its own IP address?

Can a computer running a DHCP server assign its own IP address, or does it have to be set statically? If this is a question which depends on the DHCP software, then my configuration is a Debian server ...
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isc dhcp server static address allocation

I have a server with several network interfaces that are combined in bridge, because all clients should be in same subnet. How should I configure isc-dhcp-server to lease static ip addres to each ...
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Turn old laptop into a router (dhcp and vpn)?

I need advise as to whether what I'm trying to do is possible or not. I have a spare laptop and plan to make the most of it by setting it up as my router. Basically connect my modem directly to this ...
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How can I use a separate DHCP server and have it go through 2 routers in Cisco Packet Tracer?

I am currently using Cisco Packet Tracer to simulate a network. Currently I've got this setup: PT DHCP Agent For some reason I'm not able to get the DHCP server to return an answer to PC1 even ...
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dhcpd service restart takes almost 7 minutes in CentOS7

I have 110 dhcp scopes in my config file. Everytime I restart the service, it will take it almost 7 minutes to complete. More info below: [root@dhcp ~]# [root@dhcp ~]# grep VLAN /etc/dhcp/dhcpd.conf |...
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Arch Linux Install Cannot Enable dhcpcd

I am having problems using dhcpcd. I try running systemctl enable dhcpcd@enp0s31f6 Returns Unit file dhcpcd@enp0s31f6.service does not exist. When I try running ip address, it outputs 3 options lo &...
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Steps into trouble shooting DHCP on Windows

We are trying to setup a DHCP Server Client to listen to requests on a specific Ethernet line. We had IT open the firewall ports for the port 67, and 68. Then using a DHCP Client we've successfully ...
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How can I find the DHCP server address in Ubuntu 18.04?

I need to know the DHCP server IP address. How can I find the DHCP server address in the network from my Ubuntu 18.04 device?
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How to configure a Linux DHCP server when behing a DHCP relay?

Considere the following: How can I configure my DHCP server (isc-dhcp-server package on ubuntu) to feed addresses for 172.16.0.0/18 subnet as it does not has any interface in that subnet? I tried to ...
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Ubuntu DHCPD won't start

I upgraded today to Ubuntu 16.04, I know it's a long overdue upgrade. After the upgrade finished the ISC DHCP server stopped running. It appears to be a permissions problem but I'm darned if I can ...
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DHCP discover not being answered through repeater

I am currently stuck with a fairly crappy router/modem combo from a German ISP. In order to get good WiFi signal in all rooms, I have installed a second access point, using an old router in bridge ...
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isc-dhcp-server not 'listening;

I have got isc-dhcp-server set up on my Raspberry Pi (acting as a router), but when a client attempts a request, the Raspberry Pi does not pick it up. However, when I run: nmap --script broadcast-...
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How to determine in a shell script whether DHCP is running or not

If I am running a shell script in linux environment, is there a way to determine whether DHCP is running or not? Something like below is what I wish to do in pseudocode terms: #!/bin/sh if [DHCP is ...
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Two PCs with own routers on the same LAN

I want to put an additional Windows 10 PCs, with its own broadband service provider, on the same Ethernet LAN as others that already have a different broadband service provider. Are there likely to ...
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Internet via ethernet, switch and another pc wifi

I have two pc. One has Internet via WiFi and the other one has not the WiFi board, only ethernet. If I install a dhcp server in the one with the WiFi and then connect both to a switch, would I be ...
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