Questions tagged [dhclient]
A simple Dynamic Host Configuration Protocol (DHCP) client to get IP addresses from a DHCP-Server.
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Reject a specific IP address from DHCP server and ask for another one
How can I configure Linux to reject a specific IP from DHCP server?
I mean I do not want my lan interface to get assigned 192.168.0.12 under any circumstances.
Is it possible? I have found on /etc/...
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How to make dhclient run when wlan0 is brought back up (but already has an old address)
With the following configuration on Devuan Chimaera Linux:
/etc/network/interfaces
auto wlan0
iface wlan0 inet dhcp
pre-up /sbin/wpa_supplicant -B -Dwext -i wlan0 -c /etc/wpa_supplicant/...
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How to capture DHCP gateway information?
I am building a server that has multiple upstream network interfaces, each of which receives IP addresses, default routes, and other DHCP information from different routers.
For my application, I need ...
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Wireless roaming is messing up resolv.conf
Here's my wifi interfaces
#auto wlp1s0
allow-hotplug wlp1s0
iface wlp1s0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
# up /usr/sbin/wondershaper -a wlan0 -d 9500 -u ...
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How to "predict" a DHCP IP address?
Before launching a VM from my script, I need to figure out which IP address it will get.
So I did:
dhclient <interface>
And this works, because dhclient uses the MAC address from the macvtap ...
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dhclient process messes up the wrong interface
I'm using Debian Buster and I have two interfaces configured: eth0 and wwan0 (broadband modem). Here's the relevant part of my interfaces file:
# The primary network interface
auto eth0
iface eth0 ...
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1
answer
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dhcpd snap-in directory not found
I am running dhcpd on Linux system all the subnets information, reservations n all are written in dhcpd.conf
sometimes we need to make client system's IP static and it will become very difficult to ...
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DHCP - Why is having a DUID causing dhclient to fail?
My computer's DHCP client fails during boot. If it doesn't fail, it takes an unreasonable amount of time to acquire an IP. The main symptom is that this shows up during boot:
A start job is running ...
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How to connect to the four Ethernet ports on a wireless router?
Let's say we are happy with our typical wireless router.
But one day we notice it has four LAN ports. We connect an Ethernet
cable from one of them to our computer. On our computer do we use:
...
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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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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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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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1
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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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1
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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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views
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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1
answer
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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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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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