Questions tagged [dhcp]
Dynamic Host Configuration Protocol; allows computers on the same network to automatically obtain unique IP addresses and other network configuration parameters.
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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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30
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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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Local WiFi without internet [closed]
I am trying to create a Linux based device that I can use in my house or in my car to connect to other devices using USB, CAN, etc... I have the inter-device communication working and have my Linux ...
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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 ...
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No Internet access with DHCP, static IP is fine [duplicate]
I have a setup with:
Main router provides internet, 192.168.1.1.
An access point bridge mode, connected to the main router via wireless WAN, Radio mode: Repeater.
And the second access point ...
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Windows 10 using wrong DNS server
I have a local DNS server. My router is configured to provide both IPv4 and IPv6 addresses of the local DNS server, but regardless, the DHCP server is also the DNS server so AFAIK the router plays no ...
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How to setup two routers seamlessly without having double NAT
I have two wireless routers, a generic one provided by ISP which is GPON ONU/Wireless router and a TP-Link.
I need an upgrade because the generic one provided by the ISp unfortunately has several ...
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Block DHCP ports between two routers
I have two building networks connected with a wireless bridge. Both on the same subnet, but both have there own router, gateway, internet, etc. My old wireless bridge had a firewall, so I could block ...
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Singe NIC Router/Gateway and DHCP server bootps safe with WAN access?
I have my Pi running debian acting as a DHCP/DNS server, I want to enable it as a gateway/router for NAT loopback/hairpinning to enable the public IP to be resolvable within the LAN which my default ...
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Router repeatedly singling out one Windows 11 machine for DHCP renewal and causing brief network interruptions
I have a Windows 11 machine which disconnects from the wired network for 5-ish seconds multiple times per day, sometimes multiple times within a few minutes or every 15 minutes or so. It's accompanied ...
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107
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Router only allows to reserve 16 static IPs. How to reserve more?
I have a Huawei HG8245X6-10 router, given to me by my provider. All is fine, except that it can only reserve up to 16 static IPs. Since I have a couple of servers and many IoT devices, I need more.
I ...
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290
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How to resolve issues with IPv6 via PPPoE
I am facing issues that I cannot wrap my head around related to IPv6 and PPPoE connections.
I have a server connected to a Netgear router with WAN connected to ISP and server connected to LAN port. I ...
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How to configure DHCP server rules to assign different IP ranges for different racks
I want to configure DHCP server rules such that different racks are assigned different IP ranges. Every rack has around 20 servers and there are 10 racks, how do I configure DHCP server such that ...
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DHCP server clock isn't sync with current date; would it affect leases with a 0 (infinite) duration?
I have a question regarding DHCP server where the clock of the server isn't set to the current date?
All the leases are set to infinite, now when the DHCP server time is synced using NTP to the ...
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systemd-networkd, DHCPv6 lease - On debian 10 and above, unable to find org.freedesktop.network1.Manager in busctl output
I need to extract DHCPV6 lease information and from systemd-networkd's code it seems like DHCPV6 lease is not stored on disk, but is exported via DBUS using org.freedesktop.network1.Manager node.
...
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How can I configure a MI424WR wireless router to provide specified DNS servers to DHCP clients?
I have a MI424WR wireless router. How can I configure it to provide specified DNS servers to DHCP clients so that they use my internal DNS server, instead of the routers built-in DNS server?
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How to configure a MI424WR wireless router to always assign a host the same IP via DHCP?
I have a MI424WR wireless router. How can I configure it to always assign the same IP address to a given host on my network, so that the host effectively has a static IP address?
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124
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libvirt/qemu network guest dhclient 10.0.2.15 instead of 192.168.122.2
On the redhat host, virbr0 is up and libvirt's network is configured as nat for 192.168.122.2-254 (and recently added rule specifically to assign 192.168.122.2). but dhclient with the ubuntu VM gets ...
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181
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block RFC1918 networks in pFsense for LAN seems not to work
Description of the issue: I've created a rule inside pFsense to block any traffic directed at RFC1918 originating from my OPT1 network, and it works fine. Now when I open terminal on OPT1 network PC I ...
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59
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DHCP and accessing local subnet
I have an hardware-based line with two network devices: one PC (windows 10) and special controller (for working with hardware buttons).
Controller has ip-address 192.168.0.10 and connected to pc via a ...
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On my machine with Windows 11 22H2 the DNS settings on multiple network cards automatically change to manual after some hours
As mentioned in the title, whenever I set the network cards to get their settings via DHCP, after some hours or on the next day I realize that the settings on multiple cards (WiFi, LAN (not physically ...
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PXE boot fails with PXE-99: "Unexpected network error"
I've configured a Kea DHCP server as follows (two different interfaces serving two different networks):
{
"Dhcp4": {
"valid-lifetime": 4000,
"renew-timer&...
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170
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Two-routers with devices that share same IP? [closed]
If I connect two routers via ethernet, I can have to W-LANS.
I'm not sure about many things with this configuration.
These questions come to my mind that I couldn't wrap my head around:
So would I ...
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1
answer
88
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Forcing DHCP requests to use a specified server on Debian "Bookworm"
Somebody has accidentally added a rogue DHCP server to his premises network on which I also have machines. He thinks this is probably a WiFi Access Point which he set up to support some new low-budget ...
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Linux set IP address dependend on SSID name [duplicate]
I would like to set the IP address configuration in my /etc/network/interfaces based on the SSID. Wifi connection is configured via wpa_supplicant and has two network={...} blocks with different SSIDs....
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179
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Open Media Vault DHCP IP not showing on Router's connected devices
I've currently got a media server set up and working on my local network. It's running openmediavault.
It connects to the network correctly and can be accesed from any other machine on the network ...
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2
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Is there any way to query a router about the IPs it has already assigned?
I have a WiFi device which connects to my Android phone's hotspot. My Android phone acts as a router.
From my Ubuntu I connect to the same network. Is there any way to query the router (in this case, ...
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Why Dlink DIR-615 T3 is not working as repeater with ZTE F670LV9.0 Main Router?
I am currently using a ZTE F670LV9.0 router as my main router with a default gateway of 192.168.1.1 and a DHCP server pool ranging from 192.168.1.2 to 192.168.1.250. My goal is to utilize my old D-...
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137
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how do I force Linux to connect to a specific DHCP server when there are 2 on the network?
I have 2 DHCP servers available on my network, one is an active VPN gateway, which I'm trying to connect my Linux client. By default, the client receives an IP address from the non-VPN server. How do ...
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1
answer
661
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dnsmasq DHCP server on Mac OS - not working
I'm trying to set up a DHCP server using dnsmasq on Mac OS (Ventura) so that it can serve IP addresses to virtual machines that I am running.
I have included this line into my /opt/homebrew/etc/...
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224
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How to configure a gateway's DHCP and DNS to resolve hosts with the same hostname but different vlan domains?
A local network 192.168.1.0/24 has vlans 'datacenter' 10.10.10.0/24 and 'staging' 10.10.20.0/24. Hosts are created in each of these vlans with identical hostnames, such as 'example.datacenter' and '...
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Xfinity hotspot not connecting to certain websites via extender
I am a Xfinity customer and receive xfinity hotspot at my location. The signal is weak so I got an extender. I was able to connect the extender to the xfinity hotspot, however it connects to some ...
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Router Zyxel EX3301-T0 static IP address for wired device
I did assign a static IP address 192.168.1.3 for a device, with a known MAC address,
which was connected by wire to the router.
That was done via "Home networking" → "Static DHCP".
...
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276
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ASUS RT-AXE7800 router; unable to show ALL connected devices - why?
My network is straight forward. I have an ASUS RT-AXE7800 router which provides DHCP to which is attached my ISP provided router / modem in BRIDGE mode. It's a FTTH connection.
I have multiple power ...
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Is there a way to setup manual TCP/IP configuration on MacOS only for specific networks?
I need to have a static IP address only when I connect to the network generated by a custom device that I have. Is there a way to do this operation automatically without having to type IP, gateway and ...
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186
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Receiving addresses via DHCP does not work
I have created in Hyper-V, 3 systems:
Windows 10 Enterprise
Windows 10 Enterprise
Windows Server 2022
All of them are connected to a Hyper-V virtual Switch (Private)
In Windows Server.
I created the ...
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2
answers
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VirtualBox DHCP Server on Nat Network
Could DHCP server set up on Custom Nat Network in VirtualBox? I don't want to use VirtualBox default DHCP server. I want to fully control this service.
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VirtualBox Set Hostname and Domain name via DHCP Server
I try to create NAT Network which all VM machines are assigned hostname and IP addresses by DHCP. According to my quick research, I can assign IP address with following command and I see option about ...
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DHCP server assigining wrong IP address
I have a strange problem with a few laptops. I noticed that all of a sudden one laptop stopped getting ethernet connection. It managed to get an IP with all the rest of the info (subnet, DNS servers, ...
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323
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PXE Boot ESXi 8 on Intel NUC 12
Hi I'm trying to setup a small home lab using VMWare. I'm trying to PXE boot ESXi-8 using kea for dhcp and tftp. I see my target host receiving a IP from kea but it does not seem to be picking up the ...
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332
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TrueNAS Plex plugin DNS Error
I'm fairly new to TrueNAS and have just setup a server with it installed. I want to install plex using the plugin. when I install plex with DHCP and NAT unchecked I use the ipv4 interface as vnet0 and ...
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Reconnect ethernet link over (Magic) Packet
is there a possibility to send a computer, network adapter or any other device a specific packet over the mac or something similar that reconnects the ethernet connection, for example it forces the ...