Dynamic Host Configuration Protocol; allows computers on the same network to automatically obtain unique IP addresses and other network configuration parameters.

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Guest DHCP server

I have a host (CentOS 7 with kvm/libvirt). There are 2 network interfaces on this host. eth0 and eth1. eth1 has no IP address but instead has subinterfaces for each VLAN it is connected to. An example ...
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26 views

Samba 4 AD: “samba-tool dns” commands do not work from dhcpd script

I've set up my RPi 2 as Samba 4 AD DC with these instructions - https://wiki.archlinux.org/index.php/Samba_4_Active_Directory_domain_controller That page contains script ...
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69 views

How does the guest OS of VirtualBox get a valid dynamic IP address?

I have install CentOS 7 in VirtualBox, and want the guest CentOS using dynamic IP address. The network type is bridged. The host OS is Windows 7, and the network information is like this: I ...
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15 views

OpenWRT: Set individual DHCP credentials for different clients?

Consider a small network of clients and a router running OpenWRT. All clients are getting their IP informations automatically from the DHCP server of the router. The devices in the network should all ...
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22 views

Remote Management address different from Computer Name

We are an educational institution with managed computers using a management server. Our computers are bound to an AD server as well for LDAP. The issue we are having is the remote management addresses ...
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31 views

How configure wpa_supplicant for different static ip addresses

I'm using Raspberry Pi and want it to connect at home to my "Home" network with 192.168.0.50 IP. If available my android network, raspberry should connect to it with dhcpcd dynamically. I found in ...
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15 views

Wireless home router redirects

I've got this problem: sometimes when I try to visit webpage, my router redirects me to 192.168.0.101(which is my default gateway) and wants to enter in router with username and password(default admin ...
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24 views

How do I use both my router as a secondary DHCP server?

I have a Ubuntu based server and a Draytek router. As it stands, my router is acting as the DHCP server and tells clients to use my ISP's DNS servers. I'd like to look up local machines by name ...
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15 views

Cannot set static routing or DHCP pool

I've been doing a project in Packet tracer. To start of, this is my topography: LINK, and this my configuration: LINK My todo list is: -create topography : done -set IP's and subnets : done -set ...
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65 views

DD-WRT Client Bridge: Hosts can't find eachother by name

My LAN is set up like so: lol you need rep to post images guilmon, gabumon are both running Arch Linux A200, phone are running Android laptop is running Windows 7 The problem: I can't seem to find ...
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42 views

Running PsExec via WebService in IIS 7 not working properly

I created a Web Service that will run a Psexec to execute a command to DHCP server (netsh dhcp server DHCP-IP-address show scope). It is running perfectly when I test/run it via Visual Studio in the ...
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45 views

DHCP and connection problems on cascade switches and routers

I have the following configuration (one switch at a building floor): The workstations are all DHCP enabled to get IP automatically. When I power up everything works fine. After some time (2 hs) I ...
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59 views

Wansview NCM628D02 - 2 IPs in LAN

I have a strange thing happening in my LAN. I have this wifi connected camera, IP assigned static as .128 in router and in camera setup. I can reach it through my browser without issues at it, BUT... ...
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109 views

Mikrotik RB 951 unable to ping LAN and Internet

My Mikrotik RB951 has the ether1 interface configured as a DHCP client and connected to the LAN DHCP server. It gets served IP address automatically but is unable to ping other devices in the LAN and ...
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40 views

Computers on the network randomly try to contact ISP DHCP not router DHCP

I've been fighting with this issue for a few weeks, but one of my clients has Cox Communications as an ISP, with their standard modem, and a Netgear Nighthawk x6 router. Originally the client had ...
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23 views

Starting DHCP server on Solaris SPARC 11

I have been trying to start the SPARC based Solaris 11 ISC DHCP server. I use the standard 'svcadm enable svc:/network/dhcp/server:ipv4' command to start the ISC DHCP server. But it never comes to ...
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130 views

Windows override gateway metric when using DHCP

I want outbound external connections to be split (roughly evenly) between two network adapters. (load balancing -- I don't have access to the network equipment to set up bonded links) One is wired, ...
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50 views

Both Public and Private DNS not working. How make it work properly without any conflict

I setup private network so I installed DHCP in one of my server. Now my public network DNS is not working. How can I setup DNS for private network with conflict the public network DNS? DHCP Setup. ...
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36 views

Connected to OpenVPN server (through WiFi), changing DNS on unprotected adapter stops Internet entirely

So whenever I connect to an OpenVPN with a configuration file I notice two things: The TAP- adapter has no gateway of it's own. Is that normal? Trying to resolve this problem: I copied all the ...
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53 views

Static LAN IP address not being saved. Always reverts to DHCP

I am running Windows 8.1 (64 bit) and going to my local network connections, right clicking and then going to properties of my Broadcom wireless connection I change from DHCP to static ip (IPv4) by ...
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248 views

Windows 10 preview PC getting served static and DHCP address

Setup PC: Latest Windows Tech Preview IP address set to static. Router: R7000/DDWRT Lately I've notice, when checking devices that are connected to my router, that this PC has been showing the ...
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107 views

How to bridge two interfaces both on different networks with different IP addresses in OpenWRT?

My embedded Linux device—running OpenWRT—has two interfaces that are ath0 and ath1. ath0 is a WLAN port also runs a DHCP server. ath1 is used for Internet connection. Now, I have to setup these ...
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83 views

two different name servers for home network and vpn network

As a disclaimer: I am new to linux. I have the following setup: At home I have a router (AVM fritz box) that serves as a dhcp server and "dns" server for my local network. I don't know if it is a ...
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89 views

How to force “DHCP Discover” on Windows 7

I found that at certain network, Ubuntu, installed in my laptop, could not get DHCP address, whereas Windows 7 can get DHCP address. Thus, I tried to dump packets related to DHCP address acqusition ...
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109 views

Trouble with Static Leases on DD-wrt router

I'm having real issues trying to set up a new DD-WRT router. It is a netgear R7000 with build DD-WRT:- v24-sp2 (12/15/14) std - build build r25344 My set up is basically:- BT Home Hub 4 (Using just ...
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9 views

Autoresolve a hostname via “closest” network - how?

Having all linux(redhat) machines always on one VPN network and moving them between different LAN networks, how to setup hostname resolution(/etc/resolv.conf?, and DHCP server?, and DDNS server?, and ...
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301 views

Could not start DHCP client on windows 7 home premium. Error 5 access denied

DHCP client didn't start automatic. Trying start from services: Windows could not start the DHCP Client service on Local Computer. Error 5: Access denied. What should be fixed please?
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19 views

With new DNS settings, certain webpages break

I administer the network at a school. I recently changed our router's DHCP settings to use the DNS servers 208.67.222.123 and 208.67.220.123, the former of which is the OpenDNS FamilyShield server. ...
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30 views

What should /etc/dhcp/dhcpd.conf look like for a single router when configuring shared-network

Hi I'm just doing some tutorials to learn about networking, and I came across segregating a safe and unsafe network with DHCP using isc-dhcp-server This is what my config file currently has: ...
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98 views

Java permissions & CLSID for an Agilent 34980A multiplexer unit

I am using a 34980A unit as a multiplexer, that requires Java to view the multiplexer switches through an Internet browser. To operate the instrument I have to be offline and use DHCP, to enable the ...
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136 views

Netgear WNCE4004 Wifi Adapter Connection Trouble - Static IP Issue?

Here's my situation: I'm in the military and live in an accommodation block where internet is provided by an unprotected wifi network (I'll call this 'service wifi'). To get internet access, I login ...
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32 views

ddclient updating to public IP instead of private IP

This is the antithesis to question 389125 I have private services (apache, ssh, synergys for example) accessible on a desktop on the local network. This is not with centralised login (ldap/AD for ...
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136 views

DD-WRT to push alternate Name Servers to clients over DHCP

In order for WiFi DHCP clients to use directly 8.8.8.8 and 8.8.4.4 as name servers, DD-WRT has been configured as follow add dhcp-option=6,8.8.8.8,8.8.4.4 in /etc/dnsmasq.conf (reboot) since that ...
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364 views

How to set up Networking and DHCP in windows server 2012 inside VirtualBox?

Background: Three operating systems are installed inside VirtualBox: Windows Server 2012 R2 Windows 8 Pro Windows 8 Enterprise So, I want to set up the Server 2012 R2 as Domain Controller, DHCP, ...
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17 views

dhcpd3 not reusing IP for mac

I have an ip range with two ip-addresses defined as follows in my dhcpd.conf: subnet 192.168.1.0 netmask 255.255.255.128 { range 192.168.1.10 192.168.1.11; default-lease-time 600; ...
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86 views

How does DHCP work when it's not “between” your modem and devices?

I've been looking into different options for running some services on a home server. One such option is Amahi. During the setup process they recommend shutting off any other DHCP server on your ...
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23 views

Cisco 1131AG: Wireless clients randomly unreachable

I have a weird issue with my 1131AG-E-K9. I set up a lab at home to get back into the topic after a few years break. My 1131AG is connected to one of the PoE ports of an ASA5505. Clients are 2 ...
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49 views

Split current network installation in two Vlans

here I got a (really) tricky problem In my home I have a basic router from my ISP and the DHCP Server that serves every mac address with a static IP in this configuration : Family devices : ...
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200 views

Windows 7 DHCP flooding server with requests

Am attempting to connect a Windows 7 laptop to a Debian server running dnsmasq. The Windows 7 machine doesn't seem to like the DHCP info it's getting as it re-requests it every ~10 seconds. The log ...
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56 views

DHCP configuration for local DNS server

I have a server at home with several other computers/devices using DHCP to connect. The DHCP service is provided by the router. My ISP gives me a dynamic IP address so I use no-ip to get a fixed DNS ...
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109 views

Arch Wifi - Connects but doesn't stay connected

Arch x86_64 (plain install on mSATA via USB) Linux 3.17 NetworkManager DHCP enabled at boot via systemctl Generally, the host computer is a Surface Pro 1 w/ Marvell Avastar Wifi Card and connected to ...
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79 views

Networking a small office with VPN

Recently I purchased a CISCO RV042 Small Business router with VPN Capability, obviously to allow external connection to this office via VPN to access a NAS where business files are stored. I am not ...
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304 views

D-Link Powerline AV500 Issues? One Powerline LED green and the other one not lit? Maybe also messing up DHCP?

A few times now I noticed while one of my Powerline adapters has a solid green LED, the other is not even lit. I understand the oscillation in my electric circuit influences the quality of the signal ...
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99 views

LTSP server with existing DHCP Server

I want to setup a LTSP server on the computer that is already a DHCP server. I'm using zentyal 3.4 on the server, it's basically an Ubuntu 12.04 with zentyal-core installed on it. I have instaled ...
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581 views

CentOS 7 can't get IPv4 address from DHCP server

I have classroom full of computer running CentOS 7 and only one computer can't get IPv4 address from DHCP server during boot, because NIC is not yet up, when dhcp client tries to get IPv4 address from ...
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33 views

Strange IP settings issue

Friend of mine is having a puzzling issue I've not come across before. Windows Vista box, logs into an SBS2003 domain controller @ 192.168.1.50. The first time the issue popped up (about two months ...
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33 views

Change DNS to dynamic but NOT if IP is static?

I know I can use the netsh command to change DNS settings from static to dhcp, but does anyone know a way to tell it to do nothing if a static IP address exists?? Example 1) PC1 has a dynamic IP ...
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31 views

Special type of DMZ?

So I have a standard modem-router setup all great to go, my Modem gives an IP Address from my provider via DHCP according to my Mac address. All is good. However, I now want to expose a new virtual ...
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122 views

Can't find my router in bridge mode

I got a new router that supports WDS to extend the reach of another router that supports WDS. After a fair bit of struggle, it works, but I have to disable DHCP in the new router for WDS to work, and ...
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371 views

Can't add static lease from inside DHCP range in pfSense

When trying to add my computer to static lease, I get the following error I don't understand the reason for this. If I would want to assign IP from outside DHCP range, I would assign it statically ...