All Questions
Tagged with dhcp-server linux
52
questions
0
votes
0
answers
741
views
How to manually purge dhcpd.lease?
How do I manually purge ALL dhcpd.lease ?
Can I just sudo echo /dev/null > /var/lab/dhcpd/dhcpd.lease ?
It's a special use case of testing ground; we have an isolated LAN for developers to do test ...
- 163
0
votes
1
answer
730
views
Centos 7 dhcp server not responding to UEFI PXE DISCOVER
I'm trying to set up a Centos 7 server as a dhcp server for PXE (UEFI). I'be tried several changes to the dhcpd.conf file, but nothing seems to make a difference.
dhcpd.conf:
allow booting;
allow ...
0
votes
1
answer
362
views
Setting up LAN gateway for school club network - "No subnet declaration for enp3s0"
I am a computing teacher, I am trying to setup a "sandbox" network with internet access for an after school computing club.
I have an old PC (Debian 11 installation) with 2 ethernet ...
2
votes
0
answers
1k
views
Obtaining two DHCP addresses on Linux
There have been various questions asked a long time ago about obtaining two IP addresses via DHCP on Linux. Most of those are still relating to old 'alias interfaces', like eth0:0, which has been ...
- 151
0
votes
1
answer
7k
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Is it possible to force the DHCP server to assign a different IP address each time the address is renewed?
I need to detect IP address renewals in my C++ Linux application and check if the new address is different from the old one. I have access to a router running OpenWrt. I can change the lease time, but ...
0
votes
1
answer
2k
views
Server DHCPv6 with Linux Alpine
I want create a server dhcp6 with alpine
I'm using Kea-dhcp6. The my file config this is:
{
# DHCPv6 configuration starts on the next line
"Dhcp6": {
# First we set up global values
&...
- 1
0
votes
0
answers
1k
views
Block the DHCP server from broadcasting into the second ethernet interface
I have setup my DHCP server by following the instructions in https://wiki.debian.org/DHCP_Server.
This all works but the issue I am having is the DHCP server is being broadcast in the main company ...
- 131
0
votes
1
answer
662
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Enabling DHCP on Linux Host for libvirt VMs
This is a follow up question from here: How to disable default DHCP on virbr0 and obtain IP from DHCP on host
I have a Ubuntu server 18.04, with Libvirt based Virtual Machines setup over virbr0 ...
- 113
0
votes
1
answer
6k
views
How to disable default DHCP on virbr0 and obtain IP from DHCP on host
I have a Ubuntu Desktop, with Libvirt based Virtual Machines setup over
virbr0 bridge. Currently libvirt's default DHCP server (dnsmasq) provides
IP address assignments.
root@ngadre-Inspiron-3542:/...
- 113
2
votes
1
answer
4k
views
DNS server information not provided to DHCP clients by dnsmasq
I am trying to utilize a Raspberry Pi with Raspbian Stretch (Linux) so provide additional network monitoring and also routing capabilities. To this end I have the following setup:
Internet router [...
- 21
1
vote
1
answer
546
views
How many addresses can be assigned to one network interface via DHCP
Are there any limits to how many addresses can be assigned to one client DHCP host from DHCP server?
Can I assign whole /8 subnet to one interface via DHCP?
- 119
1
vote
0
answers
369
views
Is the latest dhcp spec (rfc4361) invisable to admins?
When having an old Winsdows 2003 dhcp server, which doesn't understand the dhcp identifier OS'es such as Fedora 29 and Ubuntu 18.04 server sends. Which looks like
10,11/09/18,12:28:17,Assign,192.168....
- 10.6k
0
votes
1
answer
752
views
Exclude subnets from distribution?
In Windows' DHCP server it is possible to exclude an entire subnet from being given out to clients which doesn't have a reservation. They call this "IP addresses excluded from distribution".
Now I ...
- 10.6k
1
vote
1
answer
3k
views
DHCP relay not relaying responses
DHCP Relay NICs:
NIC 1: connection to DHCP server (assigned by 172.20.0.1):
enp1s0 Link encap:Ethernet HWaddr 00:e0:4c:68:39:0d
inet addr:172.20.0.103 Bcast:172.20.0.255 Mask:255....
2
votes
1
answer
1k
views
Have a script receive an IP from the DHCP server?
None of the Nagios DHCP check plugins can actually take an IP from the DHCP server as a real test. All they do is ask which IP it would give to a certain mac address.
Our DHCP server failed, where ...
- 486