Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [isc-dhcpd]

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.

0
votes
1answer
28 views

Does netmask and option subnet-mask have to be equal on a dhcpd.conf definition?

Using linux servers on a dhcpd.conf file I can make a definition of ip ranges that the server will assign to host computers on the internal net: subnet 10.0.0.1 netmask 255.255.255.0 { range 10.0.0....
0
votes
0answers
22 views

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 ...
1
vote
0answers
16 views

How to override DHCP client identifier

I'm running a DHCP/DNS server with dynamic DNS on Debian 9 (Stretch) How do I override a clients DHCP identifier and place in my own custom value? E.g Android phones on the network identify ...
1
vote
0answers
57 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/...
1
vote
1answer
276 views

Configuring netplan on ubuntu 18 properly

I am trying to configure the wifi and ethernet ports on a linux box in a non-standard way. I have never touched this kind of stuff before, so please excuse my naivety. I have basically just YOLO'd my ...
0
votes
1answer
178 views

Add static route to one specific address to dhcpd.conf

I want to add a static route to 10.13.0.1/32 via 192.168.178.10 to my dhcpd.conf of my dhcpd server. Unfortunately this seems to be insanely complicated. I tried the following: option static-routes ...
3
votes
2answers
91 views

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
votes
0answers
121 views

Dynamic and Static Leases on ISC DHCP

I'm running ISC DHCPd on Raspbian. I want to set up my server so that all addresses in 192.168.0.0/24 are static leases, and all in 192.168.1.0/24 are dynamic leases. I'd like the two to share the 192....
0
votes
2answers
116 views

How to make routing changes permanent

I have the below routing rules to apply once tun0 comes up (which is a openvpn tunnel). These rules help push some clients on my network outside the VPN and direct to the internet. What is the best ...
0
votes
2answers
71 views

Is there a way to cache the last IP assigned on DHCP clients and use that if the DHCP server is down?

I would like my DHCP clients (CentOS 7) cache the last IP assigned (reserved) for them and use that if the DHCP server is down. Below is the current network interface configuration of my DHCP clients:...
1
vote
1answer
164 views

isc-dhcp-server configuration [closed]

so I've been bashing the keyboard for hours now and finally I surrender. Anyone else have an Idea of how to configure the ISC-DHCP-SERVER on Debian 9? So it should be pretty simple I guess. I've ...
1
vote
2answers
1k views

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/...
2
votes
0answers
463 views

How to use ISC KEA DHCP to inform “DNS” and “GATEWAY” to my DHCPv4 clients?

To illustrate I will inform the configuration of my ISC KEA DHCP (DHCPv4) and my DHCP client. Below is the configuration I am currently using for my ISC KEA DHCP (DHCPv4): $ cat /usr/local/etc/kea/...
4
votes
3answers
1k views

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 ...
1
vote
1answer
1k views

How can I use ISC KEA DHCP (DHCPv4) server to push routes to clients?

QUESTION: I have an infrastructure with 5 servers (Server #1, #2, #3, #4 and #5). I am trying to use a server (Server #5) with ISC KEA DHCP (DHCPv4) ( https://kea.isc.org/wiki ) to push routes to ...
0
votes
1answer
570 views

How to route specific client's traffic to VPN (PPTP)?

The setup: I have a server set up as a DHCP (isc-dhcp-server) and DNS (bind9) server (acting as a router). It connects to the internet via pppoe (ppp0) using eth0 device. The eth1 is connected to a ...
0
votes
1answer
1k views

dhcpd and bridge - No subnet declaration error

I prepared dhcpd configuration in Debian 8 and it successfully worked but then I added bridge and dhcpd failed. bridge: root@remote:/home/s# brctl show bridge name bridge id STP enabled ...
0
votes
0answers
313 views

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 ...
1
vote
1answer
344 views

How do I configure my DNS / DHCP / gateway server with 2 NICs to use its own DNS?

My SOHO lan is served by my main machine which operates as a router, firewall, gateway, DNS, DHCP server and backup server. I've set up bind9 and isc-dhcp-server to do DDNS for the lan clients, while ...
1
vote
1answer
95 views

Will dhcpd give away a fixed-address to non-matching client on address dificit?

I have a subnet definition in ISC dhcpd like this: subnet 10.122.224.0 netmask 255.255.255.0 { ... range 10.122.224.64 10.122.224.127; ... host room1-printer { hardware ...
1
vote
0answers
103 views

DHCP assigns a new IP address when the Time Zone changes

I have a device linux-based. Through a webpage I can change the time zone runtime. This device takes the IP and NTP address from a DHCP. Using two different servers I have two different behaviours: ...
0
votes
1answer
2k views

Error while installing dhcpd

In order to use Fluxion 2 I need to install these missing components first: I used the command sudo apt-get install isc-dhcp-common But got the following error: This is what happens after I run the ...
1
vote
1answer
2k views

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 ...
1
vote
1answer
52 views

How can I ping my dhcp server using hostname?

I've just configured a PC with a dhcp server and an apache server on it. I want to set a hostname to my server (i.g "myserver") in order to be able to access its web server by writing on the browser "...
-1
votes
1answer
639 views

dhcp option domain-name-servers format

I am dealing with subject at school and would like to check correct answer to some test question I have not passed. What does mean a following line in config file dhcpd.conf? option domain-name-...
0
votes
1answer
604 views

How to talk with IP camera through ethernet directly (no switch, hub, routers…). Different subnets in camera and ethernet's port

I want to configure an IP camera which is in my raspberry pi's ethernet port (I connect to it through wifi). I connected the camera and this is what I see when I run ifconfig eth0 Link encap:...
1
vote
2answers
749 views

dhcpd isn't matching this mac address

On my little network, I have a simple device which is apparently using only bootp (as opposed to the dhcp extensions to bootp) for obtaining its address. My dhcpd.conf file looks something like this ...
0
votes
1answer
679 views

Why won't dhcpd listen on the virtual interface

I think I might be missing something simple, but I'm at the point of needing some extra eyes on the problem. I have a need for 2 separate networks to be on the same NIC (eth1): 192.168.0.0/24 and 192....
2
votes
1answer
10k views

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 ...
0
votes
1answer
546 views

ISC-dhcp-server cannot detect ip address conflict

I had a hub connected with a dhcp server(debian 8) and two hosts A and B, as B's interface was shut down at the beginning. Then I had dhcp-server give host A 192.168.2.170 automatically, at that time ...
2
votes
1answer
49 views

Why is my switch not getting an address from the specified pool

I'm working to configure a Juniper Networks switch through Zero Touch Provisioning. On CentOS 7, the journal/log/(systemd whatever-it-is) contains this: Nov 28 10:08:46 server dhcpd[8800]: Checking ...
0
votes
1answer
48 views

Separate dchpd.lease file for each subnet

Is there a way that I can configure dhcpd to create a separate dhcpd.lease for each subnet? i.e: subnet 192.168.0.0 - \var\lib\dhcp\dhcpd.168.0.0.lease subnet 192.168.1.0 - \var\lib\dhcp\dhcpd.168....
1
vote
1answer
328 views

Is there a way to get a buggy package to work on debian stretch?

I need to install isc-dhcp-server on debian stretch, but the package cannot be installed correctly. apt-listbugs list isc-dhcp-server: #867362 - isc-dhcp-server: DHCP server does not start after ...
0
votes
1answer
2k views

Web interface for BIND DNS and DHCPD servers

Currently we are using the BIND DNS and the standard DHCP server that comes with Linux (Scientific 6.4) as networking services on a private networking. Is there any some kind of a web interface that ...
1
vote
1answer
1k views

How to make Wireless AP accessible (local server) without internet connection?

Using hostapd and dhcpd, I was able to turn my raspberry Pi into a hotspot/router. It works fine, but I want to know how to make it accessible (via wifi) when it's disconnected from the internet. I ...
1
vote
1answer
1k views

ISC DHCP Server doesn't handout dns servers to clients [closed]

Yesterday I setup a isc dhcp server on a raspberry pi together with a dns bind server. Now the problem is, that the dhcp server doesn't hand out the dns server to the clients but if I manually ...
2
votes
1answer
327 views

Bridge eth0 and wlan0

I've a computer, C, a router R, and a raspberry pi, P. They are connected: Internet <--ethernet--> R <--wlan--> P <--ethernet--> C Now I want C to be able to access the internet. The P has ...
2
votes
0answers
715 views

DHCP Server:multi subnet not working

I want to let DHCP server offer different subnet address to different group of mac address. I have been successful to offer multi subnet addresses to DHCP clients. I have used the "class" as filter ...
0
votes
0answers
3k views

Failed to start isc-dhcp-server.service: Unit isc-dhcp-server.service is mask

Below the info needed. root@usbarmory:/etc/dhcp# service isc-dhcp-server start Failed to start isc-dhcp-server.service: Unit isc-dhcp-server.service is masked. root@usbarmory:/etc/dhcp# cat dhcpd....
1
vote
0answers
66 views

Google host getting unreachable after pinging 10-12 times

I have Fedora Linux on Samsung Artik 5 board. I have made the configuration from DHCP to static. Through WiFi I have connected Internet to the board. When I ping Google, it's pinging, but after 10-15 ...
2
votes
0answers
314 views

Why is this DHCP dynamic DNS update behavior inconsistent?

I maintain a large DNS zone using BIND 9.8.2 on RHEL 6. Let's call it example.edu. It has a main zone file for example.edu as well as subdomains with separate zone files like abc.example.edu, qrs....
1
vote
2answers
4k views

Arch Linux dhcpd won't start on boot - cannot find subnet declaration

I want to have a DHCP server running on Arch Linux, but I'm having problems. I'm having an issue with getting dhcpd to start on boot. It will start ok when I manually run sudo systemctl start dhcpd@...
0
votes
1answer
779 views

Getting “no IPv4 addresses” With isc-dhcp-server And Subinterfaces

I have tried both subinterfaces and secondary ip address route and neither are working for isc-dhcp-server. It is refusing to pull the proper IP's. I am using Debian 8 Jessie and ISC-DHCP-SERVER 4.3.1....
2
votes
3answers
12k views

isc-dhcp-server not starting due to failing interface detection

I'm trying to setup AP mode on BCM4313 wireless card. My very basic hostapd config looks like this: interface=wlan0 driver=nl80211 ssid=test hw_mode=b channel=1 macaddr_acl=0 auth_algs=1 ...
1
vote
0answers
330 views

Samba4 DNS - clear old DNS records

Creating AD 2003 domain using Samba-4.3.4 with internal DNS. ISC-DHCP as a server. On Debian. DNS updates comes only from DHCP-server. What tool do I have to use to clear old DNS records, or what ...
2
votes
2answers
888 views

Renew Kerberos ticket for daemon

Using ISC-DHCPD to renew DHCP leases in an Active Directory domain. This requires using ktutil to generate a keytab for DHCPd to use in order to update secure dynamic DNS. What I need to do is to be ...
2
votes
0answers
326 views

How to set up thousands of VLANs on ISC DHCP-4.1.1-P1 server?

I have been attempting to set up a DHCP server using ISC DHCP-4.1.1-P1 compiled on CentOS 6.7 The idea is to have multiple thousands of VLANs. I have started small. I have no issue doing ifup on ...
4
votes
0answers
911 views

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-...
0
votes
1answer
73 views

Configuring ISC DHCPD on Debian

I have a Ethernet printer which should be running behind a Raspi which is connected via WiFi to the rest of the network. Network wise this is working fine, but I have issues with the ISC DHCP server ...
6
votes
1answer
7k views

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 ...