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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I use a home network with DHCP enabled and I cant set a static ip

So I'm quite perplexed by this... I used the basic technique of going to network and sharing center, going to ethernet properties selecting Internet Protocol Version 4 (TCP/ipv4) and selecting an ip ...
tanishq sagar's user avatar
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DHCP through VPN not working

Fair warning: This will be a long post because the issue is quite tangled and I am not really proficient with network setups. Here goes: I have a location where I have recently ungraded the former DSL ...
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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 ...
user2201980's user avatar
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Unidentified Network - Local Area Connection cannot be renewed - timed out while contacting DHCP server

For over a day now, I have been confronted by an Unidentified Network and that dastardly yellow triangle about the connection icon! Below, as you can see, I have attempted various solutions to this ...
slimevult's user avatar
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Same PC, Same Router, WiFi gets DHCP IP, Ethernet won't

I have a brand new Asus ZenWiFI XT8 mesh system set up and working ... for the most part! My main PC has 2 interfaces: Ethernet & WiFi. WiFi is connected and gets an IP from the router. The ...
copolii's user avatar
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What is my LAN card's MAC address?

EDIT: I meant wifi card, not LAN card. I want to connect wifi devices (printer, phone, etc) to my Windows 10 laptop. I want to used a reserved DHCP address on my router for the wifi card (not LAN ...
clg's user avatar
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Why would a PC be on a different subnet?

There are several devices connected to my home network, some wired, some wireless. With the exception of one PC, they all have the same subnet mask (255.255.255.0), default gateway (192.168.1.254) and ...
user1636641's user avatar
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Snort causing DHCP ACK spam in VirtualBox internal network

I have an internal network (10.10.0.0/24) in VirtualBox which has been configured with a DHCP server using VBoxManage. There are 3 VMs on the network, Ubuntu 16 (10.10.0.2 & 10.10.0.5), Ubuntu 18 (...
Callum's user avatar
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Can’t access router settings after accidentally disabling dhcp server

I had configured my raspberry pi server as a dns override in my router settings with dhcp server enabled. I accidentally disabled the dhcp server instead of the dns override and applied the settings. ...
MapPeddler's user avatar
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Ubuntu can't get IP over DHCP

I want to install Ubuntu 18.04 LTS and I'm using netintall iso for that. It looks weird but during the installation process, the installer can't get an IP over DHCP. In the beginning, I thought that ...
Alexander Vilnin's user avatar
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OpenBSD 6.6 wlan DHCP no link, routing issues

I've been bashing my head against this for a few days so I'm asking for help. The machine is a Thinkpad using a Intel PRO 2100 wifi card with the ipw driver (https://man.openbsd.org/ipw). I tried ...
C-C-C-C's user avatar
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Public IP address assigned instead of DHCP ip range address

I'm using a second router to connect to my main router to create a new wireless SSID. Here's my current setup: First router/main router - Generic branded router is provided by ISP and connected to ...
Technicalguy's user avatar
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1 answer
191 views

No response to embedded system's ARP request after successful DHCP

I've been working to get UDP unicast packets implemented on an embedded system, using a Wiznet W5100S internet offload chip. Their libraries enable the negotiation of DHCP, and I have successfully ...
Kureigu's user avatar
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Workaround for two devices with the same IP address on an airgapped network which is using an unmanaged switch where DHCP isn’t an option

So I have two IP cameras and a PC running Fedora 30 on a local network connected together using an unmanaged switch. The two IP cameras have the same IP address by default and for reasons I won’t go ...
classhalfempty's user avatar
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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 [email protected] does not exist. When I try running ip address, it outputs 3 options lo &...
EdCalCal's user avatar
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Make my LAN independent for local routing (DHCP + static routing) while connected to a cable modem with DHCP which cannot be disabled (ISP)

First of all, I want to say that my knowledge about networking is basic (I'm a web developer, not a net admin :D) I have a local network composed by: A cable modem with routing capabilities (Let's ...
Christian_'s user avatar
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How to carry dhcpd settings over during VMware Workstation upgrade?

The network setup for VMware Workstation appears to get lost time and time again during version upgrades. Since I had it again this morning, I thought I'd finally tap into the wisdom of the hive mind ...
0xC0000022L's user avatar
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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 ...
billybob2's user avatar
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Setting router subnet mask to 255.255.255.255

My router WAN IP is 10.0.51.132 and subnet mask of 255.255.255.255 and my external IP is something static that is always the same when I write "what is my IP" in google. The WAN IP which is 10.0.51....
Javed Ahmadzai's user avatar
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Single client with both a static and a DHCP address

I used my TP-Link AC1750 (Archer) router to assign a static address to my Brother laser printer, but the router assigned a DHCP address also when I rebooted the router. A network scan has it showing ...
old curmudgeon's user avatar
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tcpdump doesn't capture DHCP Discovery

I tried to capture DHCP Discovery through the tcpdump: # ip l | grep enp5s0 3: enp5s0: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000 # tcpdump -ni ...
red0ct's user avatar
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Can’t connect to clients on second router after a while, fixed by reboot

I have a wireless bridge in my house and it's openwrt is on 192.168.1.2 (does not have a dhcp server) and uses relayd to connect to 192.168.1.1 I have a Linksys PAP2T ATA adapter (192.168.1.153) ...
BingBang32's user avatar
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Slaying DHCP on a Debian Jessie virtual server

I have a problem with a Debian Jessie server running as an Intranet VMWare virtual machine. This machine has been recently upgraded from Debian 7 Wheezy to Debian 8 Jessie (expecting continuing later ...
GingkoFr's user avatar
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207 views

Can't get DHCP offers in a bridge network in virtualbox(win10host/ubuntuguest)?

I have tried almost every solution that claims to solve this problem. Firstly in VirtualBox settings, I changed the network adapter setting to Bridge Network and choose the network interface I am ...
Mitesh Pandey's user avatar
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1 answer
4k views

docker macvlan static ip - yet a dhcp request

I'm trying to run 2 docker containers on my Raspberry Pi with each having it's own static ip address. So far, I got it working using the macvlan network driver. But there's this strange behaviour: ...
dreiekk's user avatar
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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 ...
Michele Palmia's user avatar
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Why doesn't my 2nd PC connect to the internet wirelessly?

I use the cable-provided router for wireless without difficulty on one computer (PC 1), but unable to connect with another computer (PC 2) simultaneously. I am unsure what step to take next to resolve ...
HinckleyBob's user avatar
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790 views

Explicitly setting 'iface inet dhcp' for Ethernet disables the interface

I'm currently using an Ethernet connection, which has no configuration in /etc/network/interfaces, and is (presumably) using DHCP as specified by the router, in order to be assigned an IP address. ...
jimjamz's user avatar
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firewall windows server 2012 r2 with DHCP server

under windows server environment 2012 I have a DHCP server and I have a firewall under my machine, the firewall blocks all already. the problem that the DHCP server does not give an address to the ...
Jallouli Wassim's user avatar
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1 answer
149 views

Router doesn't provide/forward DNS server infos running on other machine on the network

I'm trying to achieve the following GOAL But cannot get to reach my web app via the additional router the same way I can from the raspi onboard WIFI chip Access point. Raspbian Stretch 9.4 dnsmasq -...
wiill's user avatar
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1 vote
0 answers
40 views

Tiny windows console_only DHCP server

Looking for %subj% IPv4 tool to use in windows shell script. Need following actions by the shell script runtime: start listening [on specific interface if posible] DHCP server DHCP server catch first ...
user2956477's user avatar
1 vote
1 answer
9k views

Ubuntu not getting ipv6 address automatically

I'm running Ubuntu Server 18.04 and for some reason it's not getting a global IPv6 address on startup. It has a link-local (fe80) address on ens18 (ethernet interface), but not a global one. To get ...
cclloyd's user avatar
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1 answer
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How to set static IP address to UDHCP client?

I am using udhcp client for an embedded device. I am trying to add a feature to set a static IP, Netmask, DNS, and gateway address. I am trying to set it through the "-r" argument (request): /sbin/...
Angelo Charl's user avatar
1 vote
2 answers
3k views

Change DHCP server from ISP modem to network router

I have an ISP provided DSL modem/router (Archer) that is currently configured as 192.168.1.1 and acts as the gateway, DHCP server, and the DNS settings are also stored there. I also have my own ASUS ...
ThunderFrame's user avatar
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Modem and Router on same subnet, but network doesn't work properly

Now I'm looking for more information why do my network file sharing doesn't work properly even if I made router to be part of LAN. I'll explain all my possible changes I can remember. I chosen to ...
user avatar
1 vote
2 answers
4k views

How to identify blank hostname in my network

I share the Internet with my neighbour, but it's mine. He asked me to do it since he couldn't ask for his own (Venezuela's things). There's an ethernet wire that goes from my router to his house and ...
César Escudero's user avatar
1 vote
1 answer
2k views

Default gateway has the same IP as the DHCP Server

Just out of curiosity, Is it normal for a default gateway to have the same IP as the DHCP server? I am running windows server with no roles installed, My IPs are dynamically allocated by the DHCP ...
christian Martin's user avatar
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629 views

Can't obtain IP with Realtek 8821ae on Ubuntu 18.04

I'm having problems connecting to WiFi. I can see networks, but not connect. Facts I can see different networks available, but can not connect Ubuntu 18.04 (Kernel 4.18) dual boot with windows 10 ...
ege's user avatar
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1 vote
1 answer
1k views

Can't reconnect to Wi-Fi after disconnecting

I use Arch Linux and this is the command I usually use to disconnect from the Internet: sudo wpa_cli -i wlp2s0 -p /var/run/wpa_supplicant\ GROUP\=wheel/ terminate. To connect again, I use: sudo ...
Hanlon's user avatar
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91 views

Why are my DHCP leases not working?

I am trying to make DHCP assign an IP address to the "PCNEW" node, but it is not working. Can anyone explain why?
Ангел Хаджиев's user avatar
1 vote
1 answer
143 views

DHClient stops working after resize2fs run

I had a weird issue with my hard drive where the filesystem wasn't occupying the entire partition. After rebooting a couple of times and running resize2fs I fixed this issue, however since doing so I ...
stmfunk's user avatar
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30 views

Windows machines don't work on network, Macs/iOS/Android etc. fine

My small network has wires and wifi. I am experiencing problems with almost all my Win 10 machines, which are able to DHCP themselves addresses, but not subsequently communicate with the gateway/dns ...
dbrower's user avatar
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1 vote
0 answers
392 views

Windows 10 laptop won't join domain but can ping the domain controller

I have a Windows 10 laptop but it is refusing to join the domain controller. This is the result of my ip config / all (I obviously hid the domain to protect security). As you see there is no primary ...
David B's user avatar
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1 answer
2k views

windows task scheduler event on external ip change

UPDATE 2 : i came up with this script : @echo off nslookup myip.opendns.com resolver1.opendns.com | Find "Address:" | Find /V "208.67.222.222" >IP_1.txt nslookup myip.opendns.com resolver1....
argaud bastien's user avatar
1 vote
0 answers
527 views

Getting DHCP to issue an address to Windows 7 Embedded

I have 3 Windows 7 Embedded: Standard machines running on my network. The network is managed by a Domain Controller running Windows Server 2016 Standard. The Domain Controller is running DHCP and DNS. ...
JukEboX's user avatar
  • 395
1 vote
1 answer
4k views

Openwrt lan configuration dhcp bogus ip addresses given

When I configure my network to use an IP address other then 192.168.1.1 connecting devices are given a bogus IP address such as 169.254.5.54. Am I missing a configuration setting somewhere that would ...
theurere's user avatar
1 vote
1 answer
213 views

Intermittent failure of IP address provision after moving to new AP router area on same network

I have a modem/router connected via PowerLine Ethernet to 3 different routers working as AP devices across our home. Occasionally (and especially when walking between different AP areas) the new, ...
Conor's user avatar
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1 vote
1 answer
49 views

After Reconfiguring DNS, ISP's "Enhanced Error Page" Still Shows

After I configured my router to use openDNS's nameservers I went to test it out by going to a random website that doesn't exist. Much to my surprise, my ISP's catch page showed up offering me their "...
user avatar
1 vote
0 answers
199 views

DHCP Client Remote Access

I'm looking for a way to get Remote Desktop Access to my DHCP Client Laptops which doesn't have an internet access(This network is inside my office). Now, I'm trying to access a particular client ...
Pradeep's user avatar
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1 vote
0 answers
1k views

dnsmasq: Give own DHCP client higher priority?

I would like to use dnsmasq and pihole to create a DHCP server which propagates the DNS server to the clients. I already did it with IPv4: I disabled the DHCP in the router, setup DHCP in dnsmasq and ...
Daniel Marschall's user avatar

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