Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [isc-dhcp]

ISC DHCP is open source software that implements the Dynamic Host Configuration Protocols for connection to a local network. It is a reference implementation of those protocols, but it is also production-grade software, suitable for use in high-volume and high-reliability applications. DHCP is available for free download under the terms of the ISC License, a BSD style license.

ISC DHCP is open source software that implements the Dynamic Host Configuration Protocols for connection to a local network. It is a reference implementation of those protocols, but it is also production-grade software, suitable for use in high-volume and high-reliability applications. DHCP is available for free download under the terms of the ISC License, a BSD style license.

256 questions
0
votes
0 answers

Statically assigned leases in ISC DHCP server are not added to DDNS

I have a gateway running both isc-dhcp-server and bind9 on Debian. Hosts that are assigned IP addresses in the DHCP range are added to the DNS zone; however, devices that I assign a static lease on the DHCP server are not added to the zone. I looked…
phaedrusschmaedrus
  • 73
  • 6
0
votes
1 answer

DHCP logs showing (no free leases)

I have setup new isc-dhcp-server in ubuntu 20.04. all client getting connect but showing there logs (no free leases) client connected only 25 machine. sudo tail -f /var/log/syslog Sep 9 09:43:57 ggn-dhcp-srv dhcpd[49319]: DHCPDISCOVER from…
Aslam Raza
  • 1
  • 2
0
votes
1 answer

Decode UID from dhcpd.leases

I have am testing a device on my network which has this lease assigned: lease 192.168.110.85 { starts 3 2022/07/20 16:12:37; ends 3 2022/07/20 16:22:37; cltt 3 2022/07/20 16:12:37; binding state active; next binding state free; rewind…
Johannes Linkels
  • 307
  • 1
  • 2
  • 7
0
votes
1 answer

ISC DHCP Server - Matching client identifier won't work for single device

I hope someone can help me with this problem. What am I trying to do I want to provide information to a Cisco ASR1k depending on its serial number. Reason for this is I don't have any MAC address of the device. Only the serial number of the chassie…
yabberth
  • 101
0
votes
1 answer

How to supply hostname using isc-dhcp-server to hosts without fixed-address

I have a DHCP+DNS setup on my network using bind9 and isc-dhcp-server. It works fine for all clients that have a "proper" hostname configured without any special setup in dhcpd.conf in the server. There are also a couple of hosts I have setup with…
xxDMxx
  • 3
  • 4
0
votes
1 answer

ISC DHCP for relay agents

I would like to configure DHCP server for my networks, but in the same time, i don't want to setup dhcp server on the network where the server itself is. DHCPD insist to configure subnet declaration for the network of the ens192 interface (which i…
Michal Žila
  • 1
  • 2
0
votes
1 answer

isc-dhcp-server ip-range speicifc domain-name-server

I'm trying to get an isc-dhcp-server configuration to use different DNS-Servers based on the ip-address assigned. Basically, I want some of my client marked as not-trusted, which then may not access services using the internal url. I tried using…
Poehli
  • 103
  • 3
0
votes
2 answers

Simple stateful DHCPv6 using ISC DHCP and RADVD. Doesnt work?

I'm trying to set a simple ipv6 network using ISC DHCPv6 on a linux machine. Here is my dhcpd6.conf: subnet6 beef:fade::/112 { max-lease-time 3600; range6 beef:fade::100 beef:fade::fffe; } The dhcpv6 server works and assigns addresses to…
carloslockward
  • 101
  • 2
0
votes
0 answers

isc-dhcp-server not replying to relayed requests

DHCP request is being relayed from a server in a different subnet to the ISC-DHCP box. ISC-DHCP is not responding dhcpd.conf is like this: subnet 10.0.1.10 netmask 255.255.255.254 {} host test { hardware ethernet 32:b8:ee:57:1e:e0; …
Dave0
  • 23
  • 2
  • 4
0
votes
1 answer

Dynamic Google hosted DNS zone update by DHCP

I have dns zone running in Google Cloud. I would like to integrate my ISC-DHCP with that zone by enabling automatic host registration into the zone. I'm looking for some analogy to enable in Google Cloud this BIND feature: key DHCP_UPDATER { …
Luman75
  • 103
  • 3
0
votes
0 answers

ISC-DHCP and BIND 9 DNS: DDNS update fails for /27 subnet

I have a problem with DDNS update with ISC-DHCP server. My /etc/dhcp/dhcpd.conf subnet section that doesn't work is: subnet 193.198.186.192 netmask 255.255.255.224 { range 193.198.186.200 193.198.186.222; # MT 20211210 option subnet-mask…
mt42
  • 131
  • 1
  • 6
0
votes
2 answers

ISC DHCP/DDNS setup: Static entries for non-dhcp clients

I have set up a local network with ISC BIND9 and DHCP service. New leases trigger the DHCP to add an A and PTR record which works perfectly. I also added lots of static host entries in the dhcpd.conf. Now I noticed that the DDNS update only works…
dom
  • 3
  • 1
0
votes
1 answer

DHCP server failover with dynamic bootp range declaration

I am trying to configure a failover for a ISC dhcp server running on Linux that has dynamic-bootp range declaration. The configuration file looks like this (I am trying it locally first, therefore private ranges): authoritative; log-facility…
Yakup
  • 3
  • 2
0
votes
0 answers

ISC Dhcpv6 pool

I recently set up a dhcpv6 server in my network. The problem is: I set the range of it to #VLAN120 subnet6 2001:470:2249:120::/64 { range6 2001:470:2249:120::20 2001:470:2249:120::250; option dhcp6.name-servers 2606:4700:4700::1111; …
Pakuss
  • 1
0
votes
1 answer

isc dhcp multiple option 240 in same subnet

I'm fairly new to isc dhcp. I'm working at an ISP and need to provide our STB's with an option 240, and it has worked fine for years, the problem now is that we are getting a newer model, that needs a different option 240 string. How do I do that in…
Danny Christensen
  • 1
1 2 3
…
17 18