Questions concerning the software from the Internet Systems Consortium for setting up a server implementing the DHCP protocol that enables hosts on an IP network to be automatically assigned a unique address and additionally have information about the network delivered to them.
Questions tagged [isc-dhcpd]
116 questions
15
votes
2 answers
Why can't I start isc-dhcp-server upon installation?
I'm following this tutorial to install Linux in a system that does not have CD reader nor USB boot capabilities. Eventually, I reached the point where I had to install isc-dhcp-server and I did, sort of.
Apt tells me that there's one partially…
Mario Gil
- 273
- 1
- 2
- 8
14
votes
2 answers
AP randomly gets unreachable for the clients while hostapd is running
I set up an old PC as a router using Debian Wheezy, hostapd, dhcpd etc. It has 3 NICs and 1 WiFi PCI card (TP-Link L-WN751ND).
The problem is that AP randomly gets unreachable for the clients while hostapd is running and its interface is up. This…
treegor
- 141
- 6
14
votes
2 answers
what is "rfc3442-classless-static-routes" in /etc/dhcp/dhclient.conf
I am trying to debug DHCP on my laptop (I am using dhcping and dhcdump to see what the DHCP server sends back). Following is my /etc/dhcp/dhclient.conf.
option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;
send host-name =…
Thomas Keller
- 62
- 1
- 3
- 16
7
votes
1 answer
ISC DHCP with Active Directory Secure Dynamic DNS Updates
I'm attempting to replace Windows Server DHCP with ISC DHCP. In order to do so, I need to be able to facilitate updating DNS records from clients that do and do not support dynamic DNS record registration.
Active Directory/DNS is running on Server…
user34365
6
votes
3 answers
Can't start isc-dhcp-server because of the Error : Not configured to listen on any interfaces!
I try to set up a wifi access point with hostapd and isc-dhcpd but the dhcp server doesn't work. The conf file is the same I found in this tutorial:
[Hostapd : The Linux Way to create Virtual Wifi Access Point][1]
!!! I still have the problem and i…
ABeater
- 71
- 2
- 2
- 8
5
votes
1 answer
How to declare fixed addresses for each subnet in isc-dhcp-server?
On Ubuntu, I've written some host declaration in each subnet with isc-dhcp-server, and each fixed address for each network interface are successfully leased. There are plugged two network cards on this DHCP server.
But how to make corrections for…
jumeno
- 53
- 1
- 5
5
votes
3 answers
Is it possible to use a single DHCP server to push completely different ranges of ip to different network interfaces in different LANs?
Is it possible to use a single DHCP server to push completely different ranges of ip to different network interfaces in different LANs?
EXAMPLE:
I have the Severs #1 and #2.
Severs #1: A DHCP server with a network interface called "enpA" which is…
Eduardo Lucio
- 664
- 2
- 13
- 34
5
votes
0 answers
How to configure isc-dhcp-server to offer upstream DNS servers?
Every example dhcp.conf I can find has hard coded DNS servers - typically the google public DNS addresses...
option domain-name-servers 8.8.8.8, 8.8.4.4;
If I leave out the option domain-name-servers, then clients get no DNS server at all.
I…
bigjosh
- 589
- 2
- 6
- 14
5
votes
1 answer
ISC DHCPD to register or update BIND DNS with Client Hostname
I am looking for information on how to configure dhcpd so that it will send updates to BIND. I can see that for BIND, I need to set the allow-update option, but I do not know how to configure dhcpd.
I have found example configurations for dhclient…
Ace
- 410
- 1
- 7
- 10
4
votes
1 answer
ISC DHCP dhclient: How to supersede DNS name servers with IPv4 and IPv6 addresses?
I want tp supersede the name server information, which I get from the DHCP server with my own configuration. Therefor I'm using the following option in my /etc/dhcp/dhclient.conf:
supersede domain-name-servers 1.1.1.1, 2.2.2.2, 3.3.3.3;
Everything…
manifestor
- 2,423
- 6
- 22
- 47
4
votes
1 answer
Disabling automatic default route from dhcp server
Hi I'm trying to configure my Raspberry PI to work as a dhcp server. Idea is that through eth0 interface I will connect switch, to which I can connect other devices. But I still want to keep ssh and internet access through the wlan0.
To achieve I…
kobra
- 143
- 1
- 5
4
votes
1 answer
why is dhcpd listening on UDP port 38053 and udp6 port 40572?
I am running a DHCP server with dhcpd from ISC and thought it should only be listening on port 67. Why is it also listening on those other ports? I cannot seem to find what those ports are for, but my guess is they provide remote administration of…
Walter
- 1,204
- 4
- 13
- 36
3
votes
2 answers
Is there a command to insert a mac address into a subnet in dhcpd.conf file?
I am looking for a command that allows me to insert an host inside the dhcpd.conf file
without manualy touching that file.
I am using: CentOS release 5.3.
The file looks like this:
subnet 97.129.0.0 netmask 255.255.240.0 {
deny unknown-clients;
…
Yerry García
- 31
- 4
3
votes
2 answers
CentOS 7 DHCP Client - How to use "classless-static-routes" ("code 121")?
According to this answer...
https://unix.stackexchange.com/a/457577/61742
... I can use the following configuration to use pushed routes from my DHCP server in my DHCP client by placing in the /etc/dhclient.conf or /etc/dhcp3/dhclient.conf file the…
Eduardo Lucio
- 664
- 2
- 13
- 34
3
votes
1 answer
How does dhcpd stop on centos?
Normally we use service dhcpd stop to stop dhcpd, but cmd service is just a script, thus it should be something executed by script so that dhcpd finally stops. For example as I write a script, when I type service dhclient stop, it executes dhclient…
YH Wang
- 33
- 1
- 1
- 3