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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.

0 votes
1 answer
30 views

Dhcp range with fixed Ips

Here I have a DHCP server with some IPs with fixed IPs that are in the range 192.168.1.91-254. And for the leases only the range 192.168.1.11-90. But I want to make the lease range bigger can I use ...
Anderson Silvestre's user avatar
0 votes
1 answer
53 views

ISC-DHCP-Server responds on 127.0.0.1 (lo) interface instead of the correct interface preventing ip assignments

I am running ISC-DHCP-Server version isc-dhcpd-4.4.1 on Ubuntu 22.04 LTS. When a DHCP request is provided, instead of replying on the same interface, it replies back on loopback (127.0.0.1): 23:01:51....
Guy Tech's user avatar
-1 votes
1 answer
173 views

Linux Bind9 DNS server, configuration throwing errors

I am having problem with DNS configuration in Linux. I am using isc-dhcp-server as DHCP server and bind9 as DNS server, but I it returning me errors. This is my Setup Internet <--enp0s3 interface--&...
mitas1c's user avatar
  • 99
1 vote
2 answers
403 views

DHCP starting before network is ready

I am having a problem with my DHCP server. When it restarts the isc-dhcp-server does not get ready because the network (it uses NetworkManager) is not ready. I put a sleep command in the isc-dhcp-...
Anderson Silvestre's user avatar
0 votes
1 answer
140 views

How do I deploy correctly my DHCP Servers with DHCP Option 82?

My Goal is to achieve a seperate DHCP Pool on my switches, how am I able to achieve it on a flat network hosted for a LAN-Party. Which means seperate VLANs should be avoided We're talking about ...
Gamienator's user avatar
1 vote
1 answer
275 views

Stuck with DHCP option 43/60 with ISC

if´ve already checked the existing threads for option 43, but I don´t get it for my case. I want to implement a thin-client auto-registration in our productive thin-client subnet - and I´m not DHCPD ...
Marc's user avatar
  • 11
-1 votes
1 answer
145 views

Why am I not able to resolve names on subnet behind a lab network?

I have gotten the task of setting up a network where there is an existing gateway for my "public ip" 10.200.3.2/28 already. I am to setup a gw/dhcp which uses the existing gateway the given ...
Danders's user avatar
1 vote
0 answers
489 views

Different gateway for a single host in DHCP server

I am using ISC DHCP Server and I want to assign a different default gateway for one of the devices using that DHCP. I have the network 192.168.0.0/24, and two redundant ISC DHCP servers assign IP ...
nobody's user avatar
  • 51
0 votes
1 answer
128 views

how to parse DHCP vendor-specific-info

Hello I would like to allocate IP based on the serial number as the mac address is not available without me connecting physical cable and login. Tcpdump PCAP DHCP packet: TIME: 2023-10-27 09:58:33....
miu's user avatar
  • 1
0 votes
0 answers
2k views

ISC DHCP server web interface

I want to ask what web interface could be used for isc dhcp server on Ubuntu 22.04 server. I want to create dhcp server on ubuntu, I installed and configured isc dhcp but now i want to manage it from ...
skoczo's user avatar
  • 9
0 votes
1 answer
876 views

isc-dhcp-server "No subnet declaration for enP4p65s0"

TL;DR: I'm aiming at configuring my own Ubuntu 22.04LTS-based router for my home network, using isc-dhcp-server, nftables & NetworkManager. I'm experiencing weird DHCP behaviors. I'm using a Nano ...
Ben's user avatar
  • 1
1 vote
1 answer
533 views

DHCP server does not provide correct filename for PXE

I'm trying to configure PXE server for both Legacy/UEFI support. So I need to provide different bootloaders based on architecture of machine. Here's part of dhcpd.conf: option architecture-type code ...
SibVal's user avatar
  • 11
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 ...
Justin Killen's user avatar
1 vote
2 answers
2k views

No subnet declaration for WAN

I have 2 netcards enp0s3 for WAN and enp0s8 for LAN. WAN has dynamic IP address (received from ISP). LAN has class C static IP address for my local network I have isc-dhcp-server with this config: ...
acgbox's user avatar
  • 398
0 votes
1 answer
162 views

Migration strategy to migrate a DHCP scope from old DHCP server to new DHCP server as smooth as possible

My current homeLab and entire home is currently running on a single subnet 192.168.0.0/24 with my ISP provided router running a DHCP scope handing out addresses in the 192.168.0.20-192.168.0.254 range,...
Simon Kepp Nielsen 's user avatar

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