Questions tagged [dhcp]
Dynamic Host Configuration Protocol; allows computers on the same network to automatically obtain unique IP addresses and other network configuration parameters.
1,680 questions
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DHCP Not Assigning IP Addresses for WiFi on VLAN 40 - mikrotik
I’m trying to configure a VLAN (VLAN 40) on my MikroTik router that includes both Ethernet ports (ether3, ether4) and a WiFi network. However, I’m encountering an issue where devices connecting to the ...
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DHCP doesn't work with NetworkManager, but does with other tools
I have a server with 2 ethernet devices eth0 and eth2, managed by NetworkManager. There is no configuration in /etc/NetworkManager and both connections have ipv4.method to auto. The connection at eth0 ...
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ZTE Router requires Internet reset to reconnect to Internet (No Internet, Secure) (LAN/WiFi)
I’ll try to be as specific as possible with the little network knowledge I possess, I’m sorry in advance if I butcher something, english is not my first language.
One day my household lost internet ...
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SSH Hostname not being binded to IP from one windows device. Works from another
Setting up a network fleet for long distance work from educational institution laptop device and personal device, connection through SSH on my Ubuntu Server. I use CMD in Win 10/11 on my two client ...
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Host found with same name, different IP address in the domain
I have a Windows Server 2008 domain controller with DNS and DHCP services.
This machine is called server and has a static ip of 192.168.10.201. I used a network scanner and found a machine named ...
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RPI: Use a WiFi AP to broadcast the RPI local network
I've been running into some difficulty trying to figure out how to go about the project I would like to do. Here is a flow chart of my approach.
Docker Container > RPI > (via eth0) WiFi AP > ...
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How to provide internet access to a Tftpd64 DHCP server on Windows?
On my Windows 10 machine, I have set up a DHCP server using Tftpd64. However with my connection I want to also provide internet to the clients on the server. Are there any specific configurations or ...
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With network manager (nmcli), how do I drop and renew a dhcp lease from the command line?
In Fedora 40 etc., the old dhclient advice for dropping a DHCP lease no longer works. Instead, dhcp is handled by NetworkManager. The GUI for this works great if you have it installed; with nmcli it ...
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How to access IP and port configuration of the tablet running Linuxmint with "hostapd + DHCP"
My task: Configure and run Access Point (AP) on the tablet (x86) with Linux mint with access from devices connected to the created AP.
Background as additional information (but this is not the topic ...
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VirtualBox host only adapter interface doesn't get an IP address in Oracle Linux 7, and wired connection 1 with ipv4 automatic dhcp failed to connect
I want to use Oracle Virtual Box to do a test of connecting CentOS that has been created and connected to Data Studio from Windows. The first thing I did was set up to have IPv4 changed to automatic (...
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systemd-networkd "DHCPv4 client: DISCOVER" until manual dhclient invocation
Ubuntu 24.04.1 LTS server with network managed by networkd and netplan.
I have a well-behaved interface wlp2s0 which gets a DHCPv4 configuration within ~2 seconds, as expected. However enp4s0 which is ...
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Static DHCP working over 2.4Ghz but not on 5Ghz WiFi
I am trying to learn assigning static IP address to my PC. I use zyxel wifi router and added my mac address for static ip assignment. Now my router has two separate bands 2.4Ghz and 5Ghz.
This is the ...
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How to silence “unknown dhcp option value 0x7d” in OPNSense
I keep getting the following log message whenever the DNS lease on my external interface is renewed:
Error:dhclient:unknown dhcp option value 0x7d
Since the lifetime my ISP has configured for their ...
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How to setup two subnets using two routers at home?
I want to connect some devices to the internet and have them isolated from the rest of my network. Since I also want to use PiHole, I also don't want the DNS resolution of the "outer" ...
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How to configure a virtual DHCP server on an ESXi 7.0 system using pfSense and a physical switch?
Currently, I have a setup where I'm trying to extend the DHCP service provided by pfSense to affect physical devices outside the virtual environment. This includes devices like laptops/PCs connected ...
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How to manage IPv6 addresses in a home network?
I apparently don't understand something about IPv6. Or I'm trying to use my experience with IPv4 networks... In any case, I have a problem.
I want to manage IPv6 addresses in my home network. I want ...
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I cannnot use internet and file access at the same time on ethernet crossover
I have 2 pcs connected via ethernet crossover. main pc is connected to internet via wifi. but i cannot share files and use the internet at the same time on the second pc (it does not support wifi). i ...
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Will Windows 1x query both DNS servers upon an NXDOMAIN response from the preferred one?
I have a case where DNS1 can respond to example1.com queries (it may be authoritative or not) and DNS2 similarly to example2.com.
My question(*): if both are defined as DNS servers in Windows 10 or 11,...
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How do respond to BOOTP requests using the TFTP daemon with Fedora?
I'm trying to boot a few embedded machines over an RNDIS network link (USB) and I can't seem to get the TFTP server daemon to respond to the BOOTP requests. I can see the BOOTP request packet being ...
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Unable to connect to internet in Kali Linux 2024.2 after the error "Your Network is probably not using the DHCP protocol."
I can't connect to my internet in Kali Linux. I installed Kali on a Virtual Machine using Oracle VM VirtualBox.
During the installation I encountered the error:
"Your Network is probably not ...
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IPTables Nat Confusion
I'm trying to make a NAT using IP Tables with the following configuration. OrangePI1 has two interfaces LAN and WAN.
LAN is a static address network where OrangePi2 lives and has a static ip.
On the ...
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cannot configure WiFi network on octopi/raspberry pi neither dhcp nor static ip
I have tried to connect my raspberry 3B via WiFi, but get an error as follows:
dhcpcd failed on all interfaces "not configured"
/etc/dhcpcd.conf configured for static IP on wlan0: no IPv4 ...
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Kea hub and spoke configuration with OPNsense running on the hub
Consider a small network with OPNsense acting as an Internet router/firewall, and two LANs. The two LANs serve different tenants, hence communication from LAN 1 to LAN 2 or vice versa is blocked.
DHCP ...
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User's PC have 2 different IP in the same DHCP network
I currently have an issue with a user on Active Directory where their PC have 2 different IP address but in the same DHCP network (ex: IP 1: 192.168.1.10, IP 2: 192.168.1.11), gateway: 192.168.1.1). ...
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Forward (share) network to a bridged interface of 3 adapters
I have this network (network structure picture):
I need to configure the Kylin laptop to let other clients (PC, phones) access Internet. I have 3 USB ethernet adapter (enx000ec6c5afc1, ...
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Cannot make the DHCP Server of Adguard Home to work
I bought a mini-pc to start experiment a little bit with homelab. My plan is to setup Home Assistant, Adguard Home and Nextcloud as a starting point. All those, through proxmox. The router I have is ...
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About APIPA start range
I have a serious question!
Why APIPA alway start with 169?
Why it doesn't start with 120 or 195 or something like that?
What is the matmatical purpose behind it?
Thanks
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VMware DHCP server (vmnet-dhcpd) rejects option "rfc3442-classless-static-routes"
I am trying to set up the VMware DCHP server to push a static route (192.168.248.0/24 -> 192.168.248.129) to DHCP clients (VMs) connected to a custom interface called vmnet14. I referred to this ...
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My provider has deprecated our modem and TV. How can I save my existing household network?
I had a Rogers' cable modem as my internet and old-school coax TV. Rogers has deprecated those systems as of two days ago. I have a few more days before I can't send the new Bell gear back (next ...
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Windows 10: Wireshark sees DHCP DISCOVER, tftpd64 does not?
I am trying to follow the procedure given in https://alexanderhoughton.co.uk/blog/connecting-to-raspberry-pi-direct-to-pc-via-ethernet/ - in briefly, it says:
Raspberry Pi is already connected with a ...
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Changing my LAN IPv4 to DHCP makes opnsense unreachable on hetzner
I following a tutorial on a blog about opensense.
I have a client server and opnsense server. I want the client server to use opnsense for its network and have access to public network through the ...
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Windows 10/11 network does not show all the computers
Three PC - Win 11 Home, Win 10 Pro (2x)
Gigabit Ethernet, router (CISCO/TP-Link/Mikrotik) as DNS and DHCP server (static/dynamic/predetermined), the same workgroup
Setting is the same in all the PCs:...
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terminal automatically shows user@dhcp instead of user@fedora
my system (fedora 40) automatically shows user@dhcpf196 instead of the usual user@fedora in the terminal whenever I connect to the internet. I think this is my university dhcp server but the machine I'...
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How to put a router with DHCP between my computers and the modem while keeping the 192.168.0.x addresses?
My internet provider has occasional issues and the modem that is a DHCP server for my computers leaves me without a local network until their issue is resolved. So I figured if I put a router (with a ...
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Access Point ip address is different in Web UI than what router shows
I have an Edgerouter X as router and a Fritzbox as access point. The ER-X shows a different ip address for the fritzbox than what the fritzbox itself show in its own network settings. Also the ...
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Full Network Enumeration without an assigned ip address
I've faced a situation where I connected to a network with an ethernet cable and the DHCP server was disabled, so I didn't get an assigned ip. I was wondering if I can run a scan with kali linux tools ...
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IPv6 clients only ask for DHCPv6 addresses on FE80
Why would IPv6 clients only ask for DHCPv6 addresses on FE80:: (link-local unicast)? Autoconfigured addresses are fine (on 2001:4341:360:65::/64 as expected).
Have I screwed up my radvd.conf (below; ...
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Ubuntu 22.04 stuck on discovering DHCP
My regular Ubuntu 22.04 laptop is not able to discover DHCP in my home wlan since this morning for some reason. We had issues regarding rogue DHCP Servers in the past, but this time the behaviour is ...
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How can an inactive reserved IP address be used by another device on Windows server? Shouldn’t it be reserved?
I freshly set up DHCP server on Windows Server 2022 and create in advance IP reservation for devices.
At this stage, all devices concerned by this reservation are not yet connected, so IP reservation ...
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Add dhcp request ntp-server (42) option in Windows clients
There is a way to add ntp-server dhcp option request in a windows clients?
In the registry it ask some option but not ntp.
screenshot
Thanks in advance
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Issues when setting up static IP on Debian bookworm
I have recently started hosting my server from my PC and everything worked perfectly until my public IP changed. I taught I have successfully setup a static IP but I didn't. Now I am in a loop of ...
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Reverse-DNS not correct (BIND9 DNS + ISC DHCP)
In my home network under Ubuntu I use a BIND9 DNS server and an ISC DHCP server with Webmin.
Here are my settings:
DNS Master Zone:
Foward: home.local
Reverse: 192.168.5
/etc/bind/named.conf.local:
//...
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Do DHCP and IP depend on each other?
DHCP is a protocol at the application layer, so it must depend on the IP protocol in the network layer. But the IP protocol requires assignment of IP addresses to network interfaces, which is the job ...
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ipv6 - how to make network hosts ignore advertised DNS
On my home network I have:
Router provided by my ISP. DHCP server switched off in its configuration
Raspberry Pi, running dnsmasq (among other things), providing DHCP and DNS servers.
The Raspberry ...
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Make Linux automatically determine whether to use SLAAC or DHCPv6
I'm setting up my Debian router. Depending on where I put my router, I need to use either SLAAC or DHCPv6 to get an IPv6 Address (and I need them both because I am not sure whether I'll need to use ...
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strange extra IP IPv6 addresses
My local network runs IPv4 and IPv6. The IPv6 is mostly experimental, as my internet service provider uses IPv4. I'm running DHCP for IPv6 on a W2K8R2 server. Several computers on my LAN have IPv6 ...
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How to prevent dnsmasq from creating AAAA records for hosts using DHCPv6?
I have a dual stack (V4+V6) internal network with dnsmasq providing DNS, DHCP, and DHCPv6 services. I want to use ipv4 for most of my internal host to host communications, so I don't want dnsmasq to ...
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Only allowing specific IP for DHCP OFFER. Blocking all other IPs with Windows Firewall
I`m living in a dorm and somehow the university did not activate DHCP-Snooping on the switches. (Don't ask me why)
As expected some non-tech-students plugged in their router and did not turn off their ...
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Netgear CAX80 router/gateway blocking MMS messaging on mobile device
I have a problem that I have been banging my head on for quite some time, so I figured it was worth asking for help. The lease on our Xfinity gateway/router combo unit ran up and against better ...
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trying to separate DHCP and Static
As a small business, we aim to host our own onsite email server by obtaining a static IP from our ISP. The ISP provided us with a router capable of both Static and DHCP. Currently, the Cox cable is ...
