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Questions tagged [dhclient]

A simple Dynamic Host Configuration Protocol (DHCP) client to get IP addresses from a DHCP-Server.

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Is DHCP protocol involved in connecting a network interface to a local network?

I often use this command to connect to a WPA2 wireless network: wpa_passphrase [SSID] [password] | sudo wpa_supplicant -D nl80211,wext -i [wirelessInteface] -c I get wireless network immediately ...
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How to release and renew DHCP lease using dhclient, without loosing connectivity

I want to be certain this will work before I try it, since I'm dealing with a headless Pi (Zero W if it matters) that is only ever accessed via SSH. I've set up an address reservation in my router for ...
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Trouble to get a ipv6 address with dhclient/console lines

I have issues to get an ipv6 address when using the command dhclient -6 to connect my PC to gateway by wifi. I have those logs when I use dhclient -6 -v sudo dhclient -v -6 Internet Systems Consortium ...
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Cannot ping other addresses after DHCP lease

I’m trying to connect my Arch Linux laptop to the WiFi at my school, but it isn’t working. WPA supplicant doesn’t report any errors, and dhclient is able to get me an IP address. But after that, I can’...
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wired ethernet device on a wifi client computer, using the same subnet and IP from same pool

I am developing a mixed network with wireless connected client computers, via WLAN provided from an access point, driven by CentOS stream 9 (Installation see in this article) for the purpose of a ...
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dhclient needs to be run about every 5 mins or so

I have just installed arch Linux for the first time and was having some problems with the Wi-Fi, I installed dhclient and that fixed it but the Wi-Fi only works for like 5 mins after i run the command ...
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isc-dhcp 4.2.5 -- does it have support of dhcp-client-identifier and vendor-class-identifier?

I have isc-dhcp-4.2.5 server and client installed on two CentOS-7.4 boxes. I know this is quite old distro, but I can't change it for various reasons. Dhcp server configuration: option domain-name &...
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cancel dhclient eth0 command on linux

I accidently run on my computer : dhclient eth0 and now i cant ssh to my computer by it's ip. restart the computer didn't help. How can i cancel this command or fix it? thank you for helping!
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Is it possible to stop printing out in a console information after calling dhclient -6 if an address cannot be assigned to an interface?

When I run dhclient -v -i <interface?> to get IPv4 address and the address is not assigned to an interface, after some time, the command shows information that there was no offers and it stops, ...
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Enable IPv6 on RHEL 8 via dhclient.conf modification

How can I prepend IPv6 to RHEL 8 dhclient.conf? This didn't work: prepend dhcp6.name-servers 2606:4700:4700::1111, 2606:4700:4700::1001; IPv4 has no issue but getting IPv6 to work is a problem.
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How to prevent dhclient overwriting static addresses on network interface?

I have a dhclient running on eno2 interface: 3070 /sbin/dhclient -1 -v -pf /run/dhclient.eno2.pid -lf /var/lib/dhcp/dhclient.eno2.leases -I -df /var/lib/dhcp/dhclient6.eno2.leases eno2 dhclient has ...
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What are LPF and Socket/fallback in the output of dhclient -v?

Below is some sample output of that command: $ sudo dhclient -v Internet Systems Consortium DHCP Client 4.4.1 Copyright 2004-2018 Internet Systems Consortium. All rights reserved. For info, please ...
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Why udhcpd doesn't respond to DHCP requests?

I'm trying to configure a DHCP server with udhcpd.conf at the address 192.168.100.30. Here is the content of the file: # Sample udhcpd configuration file (/etc/udhcpd.conf) # The start and end of the ...
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DHCLIENT not getting the intended static IP configured in DHCP Server

We have a Linux client that is running a Yocto Thud image. I have set my dhcp to reserve a static address for this client alone. However, the client still continues to get a dynamic IP from the DHCP ...
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Time specified in dhclient.leases file is several years in the future

Background Several embedded linux devices are connected via ethernet to a network. Based on what port they are plugged into on the switch they get a corresponding DHCP IP address (each port exists on ...
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Would DHCP client renew after detecting link changed

I did below experiment with some devices. prepare a DHCP server prepare another device with DHCP client (dhclient was used) client got its IP I tried to link down and link up of client, and checked ...
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Run script on obtaining custom vendor option in Stateless DHCPv6 client

I am using Ubuntu and this question is regarding DHCPv6. After obtaining RA (router advertisement) with O-bit ("Other configuration" flag) set to 1, an information-request is sent by the client. ...
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Where is DHCP data stored on OpenBSD?

I'm currently testing with some DHCP and I'm wondering how I can verify if options like "option host-name" or "option domain-name-servers" really worked on the client machine (OBSD 6.6). Where does it ...
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How to make custom DNS servers show up in resolv.conf automatically after prepending DNS servers in Kali Linux?

I prepended DNS servers in dhclient.conf as such: prepend domain-name-servers 208.67.222.222, 1.1.1.1, 8.8.8.8; I restarted network using: $service network-manager restart So far so good but when ...
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Need to run dhclient for connecting to internet

I need to run these commands : sudo dhclient -r #refreshed ip sudo dhclient # restarted ip when i restart my LMDE 3 Cindy every time for connecting to internet. So i asked here why this must be ...
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dhclient OPENSSL_1_1_1

My dhcp client because some openssl version mismatch. Here is an error: debian:~$ sudo dhclient dhclient: /usr/local/lib/libcrypto.so.1.1: version `OPENSSL_1_1_1' not found (required by /lib/x86_64-...
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dhclient Active for Interfaces with BOOTPROTO=none

I'm facing a strange issue with my Linux bridge system (CentOS 7.6.1810). I have two interfaces configured with a bridged network (IP of the bridge is 192.168.42.253). When I reboot the system, it ...
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dhclient is not getting an lease / ip address from dhcp - but windows gets one

How could it be that I get easily an ip address with Windows 10 network manager and not with simple Linux QNAP NAS System? And not working situation. I tried to renew the ip address manually. [...
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Debian workaround 838871: dhcp network configuration without blocking boot process

Is there a workaround for Debian Bug #838871? Problem: I want to have a network configuration on Debian with the following properties: Automatically ifup network interface when a cable is plugged in ...
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How to set an IP from a specific range with dhcp?

I want to set a IP to my Debian machine using dhcp but I only want to select that IP from a specific range . For example, my net is 10.0.100.0/24 and the range has to be from 10.0.100.90 to 10.0.100....
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Why do I have to run dhclient on boot?

After a top-notch decision to blindly dist-upgrade, I have to run dhclient after every boot. I understand that I can fix this with a script on startup, but it bothers me that I have no idea what ...
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How to get DHCP info from DHCP Client to DHCP Server

I have a firewall with an Internet-facing ethernet, and a home LAN facing ethernet. The Internet-facing interface acquires DNS server ip addresses from the ISP's DHCP server. I would like to propagate ...
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Slow internet connection after MAC address spoof

I'd like to ask a question about spoofing MAC addresses. I'm trying it out in my own wifi network just to see how it's done. I'm running ubuntu 16.04 LTS. Let's say my original MAC address is 00:22:...
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Force run a dhclient script?

I'm seeking to prepend a local resolver into /etc/resolv.conf using a dhclient script at /etc/dhcp/dhclient.conf: prepend domain-name-servers 127.0.0.1; Is there a way for me to force dhclient to ...
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Beaglebone Debian/Wheezy. Static IP address some times is changed

I have Beaglebone Black with installation of Debian 7.11 Wheezy I have network which is created from Beaglebone and the Beaglebone IP address is set to be static: 192.168.20.1 This is my /etc/...
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Have to restart dhclient on enterprise network each time lease expires

I connect to a WPA2 enterprise network on Debian Jessie using Network Manager on dhclient. It works fine until the lease expires: Feb 04 15:52:31 arjun-thinkpad NetworkManager[26926]: <info> [...
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Where is current dhclient lease on RHEL7?

I cannot find any of dhclient.leaseon my RHEL7.4. There is no one in /var/lib/dhclient.
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Double entry in DHCP lease file

I noticed that my DHCP lease file (/var/lib/dhcp/dhclient.eth1.leases) has more than one entry for my external Internet-facing IP interface. Some of the lease entries have overlapping timeframe. I'm ...
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dhclient command does not allocate ip address to my interface [closed]

So I was trying to access a website through my browser but I couldn't. So I issued the ifconfig command to see if there was something wrong with the IP address I noticed that the interface enp0s3 ...
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DHCP DNS and Domain resolution NetworkManager

My environment is following, all cabled with gigalan, all latest Debian 9, vm with virtualbox on 2 different physical hosts. A mikrotik internet router which acts as DHCPD I configured it setting ...
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Why do I have so many /etc/resolv.conf.dhclient-new.xxxx files?

I don't understand why I have on one machine (debian 9) so many /etc/resolv.conf.dhclient-new.xxxx files my /etc/dhcp/dhclient.conf option rfc3442-classless-static-routes code 121 = array of ...
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Does openwrt have a dhcp client?

I was surprised that building a default open wrt config created an image without dhclient, After some digging we found odhcpd package for use as the dhcp server but I still can't find any package that ...
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Run dhclient on startup

I have this server that loses its network config on reboots, it's running Ubuntu Server 18.04, I tried the netplan commands but none generated a thing, maybe it's because the interface isn't even ...
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How to renew the IP with dhcp client if the AP changes the IP range without disassociate the clients

We are executing the dhclient for our Wi-Fi interface. When the Wi-Fi disassociates from the AP, we have a script that renews the IP automatically from the new AP: cat dhcpaction.sh #!/bin/sh ...
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dhclient does not work in opensuse 42.3, what's wrong?

On openSUSE 13.1 , dhclient eth0 works well, it re-request an IP address from DHCP server, which cost 1~2 seconds to finish. However, with openSUSE 42.3, dhclient always fails instantly. I don't know ...
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Supersede DNS at commandline (rather than directly editing /etc/dhcp/dhclient.conf)?

I know that I can use my chosen DNS by adding the following line to /etc/dhcp/dhclient.conf: $ supersede domain-name-servers 1.1.1.1, 1.0.0.1; I can verify that the correct DNS is being used as ...
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Automatically get IP address (DHCP) when plugging the ethernet cable in

I have a freshly installed system ; it's Raspbian (based on Debian), on a Raspberry PI, installed with raspbian-ua-netinst. I believe this is a general linux question, though feel free to redirect me ...
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Linux not running DHCP upon connecting to new VLAN

So I have autossh running on a Linux system, and it's configured to re-connect to my SSH server if it gets disconnected. I can confirm that this works by simply unplugging the NIC and plugging it back ...
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1 answer
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dhclient says it's bound to address - but ifconfig doesn't

I started dhclient with: syslog: ... Dec 27 03:26:03 HOST dhclient[13412]: DHCPDISCOVER on enp4s0 to 255.255.255.255 port 67 interval 3 (xid=0x859ef640) Dec 27 03:26:03 HOST dhclient[13435]: ...
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Creating multiple WiFi clients with a single wireless interface

I am currently working on a project where I would like to be using a single TP-link wireless adapter and split it into multiple clients. What I've done so far; I was able to create multiple virtual ...
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What exactly does `iwconfig wlan1 essid "myWifi"` do?

I'm working on an embedded device with a limited amount of programs for managing the network. I ended up using the command: iwconfig wlan1 essid "myWifi" key "s:password" At times this works but I ...
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How to avoid dhclient default gateway on an interface

Here is an issue I have stumbled uppon a couple of times and for which I still have no solution. I have a NetworkManager managed box with two interfaces. Let's call them eth0 and eth1. Both NEED to ...
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DHCP client fails to get IP address (Modem EM7430)

O/S: Raspberry Pi running Raspbian GNU/Linux 8 (jessie) Kernel: Linux 4.9.24-v7+ Ran ip addr and confirmed wwan0 and wwan1 interfaces are created. wwan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu ...
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Not getting dynamic IP address by dhclient on a virtual Fedora

I run a course that includes practical classes on system administration. For that years ago I created a Fedora 20 virtual image -- it need not be a modern and secure one as it is only for executing ...
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ISC DHCP client: Where is the dhclient.conf?

Problem: I want to change the timeout of dhclient for embedded Linux that doesn’t have DHCP. What I did: I have compiled DHCP from isc.org.  I have compiled it with this CFLAGS: CFLAGS="-...
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