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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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 ...
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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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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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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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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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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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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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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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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 ...
