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Questions tagged [dhcp]

The Dynamic Host Configuration Protocol (DHCP) is an auto configuration protocol used on IP networks.

The Dynamic Host Configuration Protocol (DHCP) is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol.

DHCP allows for computers to be configured automatically to communicate with each other over an IP network without the need for setup by a network administrator.

It keeps track of the computers connected to the network with a central database and prevents two computers from accidentally being configured with the same IP address.

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Ubuntu DHCP central server

I have very little experience on this so I am asking to see if this is even possible. I have 4 different ADSL connections that each one is connected to one access point so I have 4 total different lans. I provide free hotspot on each access point…
George
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Block DNS record creation in 2008 AD environment

We build a set of virtual appliances used throughout the company. The networking on the VM is set to NAT to prevent external DNS records from being created, unfortunately at least once a month someone switches it to bridged so other people can…
Ashex
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Reboot of DHCP-Server results in a mess of Client-IP-Addresses

in my network at home, driving some ubuntu-pc's one of them is dhcp-server running dhcp3-server. If i reboot this pc all the clients are going offline with a ahavi-ip-address (169.254...). what is going on during the short downtime of the…
Ice
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C#: Query DHCP for Client Name

Final edit for clarity - In my environment, DNS will only store one record per client. If a client has multiple NICs, or changes subnets, the original IP is registered in DNS until the corresponding DHCP record expires (this is an AD environment…
scott.se
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Arduino DHCP error

I'm testing the Ethernet shield with an Arduino Uno, and I'm getting a DHCP error just using the example sketch. #include #include byte MACaddress[] = { 0x90, 0xAD, 0xDA, 0x0D, 0x96, 0xFE }; EthernetClient client; void…
andrepcg
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Network with vlans, tcpdump show connections and icmp replies and requests, but ping not received

I have network with switches which have set pvid on every port on every switch to 1. Server is on linux debian with authoritative dhcp. Some of ip addresses do not have access to gateway. I dont know what is blocking: switches or gateway. The most…
Piotr
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Connect with DHCP server and get IP address

I want to get a IP address from DHCP server to my PIC 18F4520 device, and I used mikroc SPI Ethernet Library to program my PIC. I made a code and it is not working. I want to get IP address and display it on a LCD.Can any one help me how to do…
user1431493
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Server is overloaded because of dhcpi

I run the command "htop" in the server and see that the CPU is occupied a lot due to the config.json file in the /usr/lib/updated/config.json directory. What do I have to do to turn it off? enter image description here I disabled the dhcp service…
Sơn Tùng
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How to create multiple subnets on LAN with pfsense and configure DHCP

I have been looking to the documentation and for answers on online, but didn’t find anything conclusive. I have a pfSense router/firewall up and running, and I want to create multiple subnets. How to do that? Also, I want to configure DHCP to…
Louis.vgn
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Why do I have no connection to dhcp server at ipv6 over nft

I have configured my nftable with table inet firewall { chain input { type filter hook input priority filter; policy drop; ct state invalid counter packets 0 bytes 0 drop comment "early drop of invalid packets" ct state…
madam
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How do I make DHCP ip address scopes in AWS?

I have a AWS VPC where the DHCP optionset gives me random addresses in the scope of the CIDR 10.128.1.0/24. But I want to have the DHCP scope limited, so that I can use static private ip addresses for some of the servers and dynamic for another set…
Jakob Ojvind Nielsen
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DHCP Issue on home network

I have an issue on my home office network - I'm not a networking expert in any way but I have a home network with a Samba NAS and an internal webserver for testing websites (my main role). The PlusNet router is putting out DHCP in the range…
demsley
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Why have DHCP and static IP address at the same time?

At my current place of employment, on my Windows box, when I do an ipconfig /all from my command prompt I see that I have both a static IP address as well as a dynamic IP address. Why could that be? I am trying to diagram our network structure for a…
jtbradle
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Making changes with ifconfig persistent

can anyone tell me on how to make the following commandline changes persistent? (Like via /etc/network/interfaces or /etc/dhcpcd.conf) route del default ifconfig eth0 add 172.25.1.1 netmask 255.240.0.0 ifconfig eth0:0 netmask 255.240.0.0 route del…
Thesourcequestion
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How to include dhcpv6 option37 info

Dhcpv6 packages ask include option37 REMOTE_ID date. Command: dhclient Config file: dhclient.conf Question What phase solicit or request should include? How to enable/config option37? Reference: option37 syntax. option-37 { prefix…
LiuJiang
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