DHCP is an auto configuration protocol used on IP networks.

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Can't connect to home WiFi - DHCP problem?

I am using wicd for wifi connections. Everything worked fine, but now I suddenly can't connect to my home network anymore. While troubleshooting I tried to set up a hotspot from my Smartphone which ...
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26 views

avahi-daemon withdraws IP address from my network interface

I am running an Arch Linux server in my local network. It has avahi-daemon running on it to advertise some services (like a print server). It has happened for the second time now that my server was ...
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2answers
16 views

Is a subnet required for a dhcp.conf?

I am setting up my dhcp.conf file for my dhcp server. All documentation says you 'can' define subnetworks but I have not seen and example without them. Definitions of a subnetwork say they are a ...
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2answers
27 views

How to reinstall dhcpcd without internet connection

I deleted dhcpcd off my arch install without realizing it was the IP provider for wireless. I need to get it re-installed, but I have no internet connection. I deleted the unused cache files with ...
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1answer
25 views

LXC ip allocation using DHCP

I'm trying to set up DHCP for my lxcontainers without using lxc-net. The reason for this decision is that I'd like to place my containers in different networks, such that they are unable to talk to ...
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19 views

increasing lease-time on dhclient.conf in Debian

This is the default dhclient.conf in Debian testing and which is running on my system too - [$] cat dhclient.conf ...
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1answer
30 views

dhclient enter/exit hooks to update resolv.conf

I would want to append the below line to resolv.conf of all servers in our aws env and make sure it doesn't get overwritten options timeout:1 attempts:1 rotate I came across dhclient enter and exit ...
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1answer
32 views

Network Manager does not handle switching between networks by default

I have to transition between different networks quite often using a laptop and various docking stations. If I remove my laptop from a certain network and place it again on the same network then no ...
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79 views

How to auto-renew IP from DHCP if IP is lost or changed?

I have a Synology DS1515+ fileserver running "BusyBox v1.16.1 (2015-10-28 13:23:20 CST) built-in shell (ash)", stripped down from commands. Machine is running Linux 3.10.35 #5644 SMP Tue Dec 1 ...
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1answer
30 views

static ip adress for remote administrating distant home computer via ssh?

i've set up the pc of my grandmother with debian and dhcp. I have to administrate that pc, so the best option is obviously ssh. The problem with that is just dhcp changes obviously the ip adress from ...
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1answer
101 views

Why are routes set in /etc/network/interfaces not added when the interface comes up?

Here is my interfaces file: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp auto eth0:0 iface eth0:0 inet static address 10.20.8.231 netmask 255.255.255.0 ...
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1answer
33 views

Two Virtualbox systems with same IP address

I need to test an issue with nfs so I spun up a couple of VirtualBox VM's on my system. One is RHEL7, another CentOS7. Each has a unique MAC address when viewing settings> network. Both VM's boot ...
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51 views

When no dhcp server answer, how can I force dhclient to use the static lease from dhclient.conf instead of a previous dhcp lease?

I have a piece of equipment I would like to default to a specific IP address when no dhcp servers are available. I have set the following static lease in /etc/dhcp/dhclient.conf: timeout 30; lease ...
2
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1answer
65 views

How to set static DNS with dhclient while resolv.conf keeps getting overwritten?

Following the Debian NetworkConfiguration wiki, I've been trying to setup static OpenNIC DNS with no success. The first thing I tried was directly editing /etc/resolv.conf, but it keeps getting ...
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39 views

NFS over TCP not available from (My server ip) - network is unreachable & permission denied

I am trying to boot linux mint from a server I set up in virtualbox. Server is running in linux mint, and the client that I'm testing on (also virtualbox) is disk-less and booting over network. After ...
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1answer
48 views

Unable to resolve hostname for Redhat Linux server

I've setup a Linux RedHat server and would like to use it by referring to its hostname instead of the static IP. eg. ssh admin@myhostname.blah.di.blah, instead of ssh admin@XX.XXX.XX.XXX but I get a ...
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20 views

dhclient equivalence of 'dhcpcd -NYRG' command

In dhcpcd, there are options -NYRG that prevent from replacing existing /etc/resolv.conf, /etc/yp.conf,/etc/ntp.conf files and from installing default routes. I would like to request if anyone knows ...
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1answer
117 views

Can I use PXE without DHCP by just manually specifying a static IP?

I want to try doing a PXE install for the first time. Every single tutorial I've read seem to indicate it requires a DHCP server configured to point to the TFTP server with the boot image. I don't ...
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1answer
27 views

Getting DHCP hostname

I am currently setting up Debian Wheezy on a system and network autoconfigure fails and asked to retry with a DHCP hostname. I have another system (also running Debian Wheezy) hooked up to the same ...
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2answers
72 views

How to configure raspberry to get a static IP without auto assigning a DHCP IP?

I have a raspberry PI in a network where all clients get a DHCP IP address assigned automatically. DHCP-IPs are "192.168.0.X" with subnet mask "255.255.255.0" But for my raspberry (and other devices) ...
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2answers
811 views

Host name changed remotely by wifi?

Am am currently visiting TU Wien and today I connected my Debian Linux laptop to their eduroam wlan using wpa_supplicant and the credentials of my home institute - as always when I am visiting another ...
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1answer
85 views

How to fix “deauthentication by local choice”?

I built an embedded Linux using Buildroot and I have some trouble to stay connected to my AP. Cannot get an IP address more than once. I use wpa_supplicant to connect to my AP using WPA2-PSK. It ...
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2answers
49 views

Ethernet with DHCP not working

I'm trying to get internet on my beaglebone black with ubuntu, but it won't work. My /etc/network/interfaces file has: auto eth0 iface eth0 inet dhcp in it. Should I use static IP or something? ...
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ISC DHCP Server - Qemu system

I've been trying to get dhcp address by an ISC Server. I have one DHCP Server and one qemu server with multiple image tiny core. Hopefully this ascii drawing illustrates the topology: Over the qemu ...
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1answer
41 views

Full Disk Decryption via DHCP

I would like to implement full disk encryption on all clients. But to avoid having people to enter the FDE access code when they boot, I am wondering if the access code can be distributed by DHCP or ...
2
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1answer
56 views

dnsmasq - different subnet by wifi SSID - how?

I'm using dnsmasq on an ubuntu 14.04 server as my DHCP and DNS servers on my LAN. This device has only 1 ethernet NIC. I want to setup a wireless Access Point with multiple SSID's. The wifi AP and ...
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1answer
52 views

dhcpcd failed to start

I installed Archlinux before 2 or 3 days. The weird internet connection was working fine until today, the dhcpcd fail to start. When I type systemctl status dhcpcd@eno1.service it says timed out, ...
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1answer
37 views

DNSMASQ on Ubuntu in VM not offering leases to client

I have Ubuntu running in VMWare workstation 12. I have a USB ethernet adapter which appears as eth1, and is statically assigned 192.168.0.10 My dnsmasq.conf is: port=0 domain-needed bogus-priv ...
2
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1answer
48 views

Using ifplugd with a dhcp server

I have a desktop and a laptop each with a wireless and wired (eth0) network adapter running Arch Linux. The wireless network(s) that I am on prevents the laptop from seeing the desktop. What I would ...
0
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1answer
162 views

On switching from NAT to bridge, have network issues in kali 2.0

Found few similar questions but none of them are answered so re-asking a similar question. I have a vmware 12, have kali 2.0 latest installed. First I try on NAT it works great but when i switch to ...
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reset of a ubiquiti networks power ap - no love

Had to reset our ubnt power ap. It's on fiber, and should pull ip via dhcp. no pppoe weirdness here. even so, it cannot grab an ip. all cables are connected. tried mtu 1500 and 1492. I have ssh access ...
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1answer
40 views

Redhat DHCP Server issues IP by not validating mac address

I have kickstart setup on a Redhat satellite server. On the dhcp server, I added a redhat1 to be kickstarted; while the redhat1 getting built, the dhcp server issued redhat1's IP address to a unknown ...
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wlan0 inteface hosting DHCP is asking itself where it is

I set-up Raspeberry as WiFi router: eth0 on one side, and wlan0 on the other side. My wlan0 interface is hosting a DHCP server. But every minute, it asks itself where the DHCP server is. How could I ...
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3k views

Can't install isc-dhcp-server on Kali 2.0

I'm using Kali Linux version 2.0 and I want to install the isc-dhcp-server package in order to practice on an evil twin attack but unfortunately I wasn't able to do that. I used this command: apt-get ...
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1answer
50 views

OpenVPN clients cannot share their connection to the Internet

Context: a Wifi VPN gateway (Linux Ubuntu computer) Simply One distant Server (www.example.com) and One Client (Paul, Ubuntu Linux, gateway) linked with openVpn. Server allows Paul to ...
2
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1answer
75 views

Set static IP when DHCP server is unreachable

I can configure RPi for DHCP client. But when the DHCP server is unreachable, I want to set specific IP. How can I configure dhclient for this?
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Virtual nics and dhcp testing

I need to conduct some testing and want to create 2 virtual network interfaces in Linux and bridge these to a physical nic. I need to test sending specific dhcp client parameters to a dhcp server on ...
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28 views

OpenVPN “breaks” my local DNS down

Context: Router-computer (Ubuntu 14) runs a wifi AP (wlan0), as a router between clients and Internet (on eth0). For DHCP it uses isc-dhcp-server and DNS resolvers are defined in ...
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64 views

My dhcp client isn't getting the dns server address

I have a network with diskless booting(tftp,pxe,nfs), the clients are working(receiving ip,gateway,etc), but they don't receive the dns address, what it can be? this is my dhcpd.conf: ...
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3answers
227 views

Trying to get Ethernet working in Linux

I just installed Fedora 22 alongside Windows 10 on my desktop and I've been trying to get the Ethernet to work for a long time. There is no wireless and this is my only source of internet connection ...
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134 views

isc-dhcp-server [ok] and running but doesnt seem to work at all

I am attempting to create my own Wireless Access point with compatible hardware and software. Running cmd service isc-dhcp-server start and service hostapd start on my Raspbian box returns Running ...
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Is the ordering of blocks within /etc/network/interfaces important? if so why?

I am using raspbian and have came accross a problem when using isc-dhcp-server . The problem seems to arrise when I change the ordering of the blocks within my etc/network/interfaces file For ...
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1answer
222 views

isc-dhcp-server conflicting with /etc/network/interfaces - Multiple instances match the same subnet

I am running Raspbian and trying to run cmd service isc-dhcp-server start. This returns the msg [FAIL] Starting ISC DHCP server: dhcpd[....] check syslog for diagnostics. ... failed! my ...
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1answer
72 views

Debian ssh Cannot Resolve Hostname on DHCP Server

I used to connect to my raspberry pi via ssh using the hostname of the pi and vice versa. Now that doesn't work. I can connect by using the ip address, but that changes daily and it is annoying to ...
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1answer
134 views

DHCP server with static IP not resolving hostnames (clients do)

Network Setup I have a server which I am trying to set up LXCs on I am using LXD which forces me to use DHCP DHCP is working fine already due to my setup I need to be able to access the containers ...
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1answer
45 views

What module in the kernel that inform the DHCP client to start DHCP negotiation?

DHCP client is a process instead of kernel code. How the DHCP client know when to start sending DHCP discover message? Is it the IP module in the kernel that inform the DHCP client?
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130 views

How to get new ip using dhcpcd

I'm using 64-bit ArchLinux and dhcpcd. How to retrieve new IP using dhcpcd? I've tried to restart the daemon, the IP address i got still the same $ ifconfig enp3s0: flags ... inet xxx ... $ sudo ...
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18 views

Unable to connect to internet after assigning fixed IP via DHCP

I've setup my RaspberryPi(NOOBS) as WiFi router by following online guides. Yep, I'm running hostapd and isc-dhcp-server on it. I directly plugged in RJ45 cable provided by my internet provider in to ...
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1answer
103 views

BusyBox : dhcp client seems to cause NFS mount to stop working

I have a BusyBox based embedded Linux system, mounting the RFS via NFS. This works fine except when I try to use udhcpd to get a DHCP address for eth0. This then causes the NFS mount to stop ...
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3answers
275 views

How to skip DHCP if no cable connected to ethernet in Debian

My Bananian Linux is wasting time at logon trying to get a DHCP lease for eth0 interface which is not connected. Well, the extender cable is connected to it, but nothing is on the other end. I have ...