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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71 views

How to automate running the dhclient for wwan0?

in Linux Mint 17 I have to run sudo dhclient every time I connect and disconnect to/from the Internet using a mobile broadband dongle, because otherwise the connection is declared active but when I ...
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72 views

Removed VirtualBox DHCP still offers addresses. Why? How can I make it stop?

I have VirtualBox installed on a Windows 8 host. I was using the VirtualBox DHCP server for a while, but now I'm trying to switch over to a DHCP server installed on one of the guests. The VirtualBox ...
2
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219 views

Detect network clients connect and disconnect

I have a linux gateway/server, which sharing PPPoE internet connection between network users. Seeking for a proper way to detect when network clients are connected to and disconnected from the ...
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223 views

Using BT Business Hub 3 with separate DNS server

We have a BT Business Hub 3 in our office to connect to the internet. We are a web development company and we have internal servers in our office that we want to be able to access from mobile phones ...
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627 views

WRT54G router with tomato firmware doesn't connect to internet if Windows 8 PC is suspended

This problem began occurring within the past couple of days, and to my knowledge I made no changes to any hardware or to my network layout. I have a Windows 8 PC connected to a gigabit switch (D-Link ...
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72 views

Telephone Server, Telephones, Printers, PCs & Servers on Individual VLAN's, DHCP clashing

Stuck at work tonight with a big issue. As a requirement for being taken over by a corporation we have been asked to stop using a firewall (juniper ssg-140) to separate our telephone system from the ...
2
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48 views

Correct usage of Windows Server on network?

I have two routers, one with dhcp turned on and the other with it off. this is a functioning home network. Now, I am trying to integrate into it a windows server. Should the windows server be doing ...
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3k views

Windows 7 machine not pulling DHCP-issued address

Not sure where to go on this one. netsh winsock reset and netsh int ip reset did not help. If I set a static IP on the machine, it communicates fine. But it won't pull a DHCP address. Here's where ...
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1k views

How do I configure Windows 7 to get its timezone from DHCP?

The DHCP protocol supports setting the time zone and the Windows DHCP Server implements this feature. The time zone on my company laptop (a member of a Windows domain) never changes when I connect to ...
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34 views

2 Routers on network, can i have them do different DHCP

I'm trying to fix a network that we want to have private and public access. Currently they have Verizon service with the actiontec wireless modem/router as the main router. They have the office ...
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29 views

PC's and Laptops get IP from DHCP, but other devices don't?

We're having a strange issue. DHCP is setup on a Windows 2013 Server PC, it works fine for laptops and computers, even VoIP phones. But not for our access point (or devices connecting VIA the access ...
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22 views

Static routes in ISC DHCP

I have an Ubuntu 14.04 server at home running bind and ISC DHCP. Bind is caching from unblock-us.com so that I can get access to US Netflix content. This all works fine. I'm running into trouble ...
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24 views

Troubleshooting DHCP relay

I have a home network with two routers connected through LAN. The main router is connected to the Internet. I've had connection issues with WIFI clients walking through the house as the client ...
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75 views

Why does “sudo ifconfig eth0 down” followed by “sudo ifconfig eth0 up” stop dhcp?

I am playing around in Ubuntu 12.04 trying to learn about networking. I learned that you can delete a network interface by running sudo ifconfig name_of_network_interface down However, when I do ...
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106 views

custom dhcp client on windows -manualy send discover and request packets?

My ISP has lease time 1 minute on its wifi connection. It basicly means that my system constatntly resets interface while setting same IP over and over on IP. When I set IP, gateway, netmask manualy ...
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54 views

Does a flexible (e.g. DHCP) Windows multihomed wifi adapter configuration exist?

Given Location Configuration Internet & wifi modem address: 192.168.0.1 no DHCP iDrac remote server access: 192.168.0.250 Firewall router with NAT: 192.168.0.254 -> 192.168.5.0/24 DHCP & ...
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41 views

dhcp no lease because of not-DAD mode

My virtual machine does not receive an IP lease anymore. Manually requesting a new ip lease by 'ifdown/ifup eth0' or 'dhclient eth0' or 'service network restart' don't work either. The error is ...
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89 views

why the ping doesn't get a reply?

I have an embedded board that has the CFE, a minimal loader. I have a host machine - linux FC16, where I am running a dhcpd server. My interface is p3p1. Here are the details of the ifcfg-p3p1. ...
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367 views

Using DHCP to get multiple IP addresses on single NIC on RedHat

I am trying to obtain multiple IP addresses using the ISC dhclient supplied with Red Hat Enterprise Linux 5 in order to provide the IPs to multiple applications, which will run on separate virtual ...
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902 views

Why won't my DHCP addresses “stick”?

I've been having some addressing issues that I've been unable to solve, and I'm hoping I can get some guidance about other things to research. Service provider is Time Warner cable. A static IP is ...
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273 views

How to set up a VM gateway/DHCP and virtual network in CentOS KVM?

Today I have a working setup where the physical host runs W2k3. It has 2 physical NIC's. It runs Vmware server and I have a ClearOS VM installed acting as a FW/DHCP/DNS for both the host and all the ...
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177 views

why does my network disconnects from internet every couple of hours?

I have a broadband that here you can see its details. It provides wireless and also I got two more routers that use them as access points. DHCP is disabled on them and these two routers work are set ...
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197 views

Windows 7 RNDIS client sends REQUEST without DHCP server IP

My linux based board is running a DHCP server on USB0 port to assign a fixed IP to the connected RNDIS client. When I connect Win XP or Ubuntu machine with this board, host machine gets the fixed IP ...
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63 views

Two wireless extenders with same mac address…How to assign IP address dhcp

I have two wireless extenders, and they both have the exact same mac address (same make and model) Now, they work fine in the network, I just wanted to know how can I assign them specific IP ...
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405 views

dhcp static assignment doesn't clean bind after DHCPRELEASE

I've got a set of virtual machines inside VirtualBox on a OSX host. My Gateway-VM is Ubuntu 13.04 with 4 NICs. On this machine ISC-DHCP-Server and Bind9 are running and DDNS-updates work fine when ...
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139 views

Setting up VPN on Centos with router doing dhcp

I've successfully setup PPTP VPN on my CentOS 5 server and can connect to it. I've set it up to use the IP range 10.0.1.50-60 and this works and we can ping each other but from what I can tell these ...
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45 views

Negate global parameter in dhcpd.conf

Let's say I've got a DHCP server that will serve 10 subnets. 9 of the subnets will be on the "example.org" domain and one will receive no domain from the DHCP server. I set option domain-name ...
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94 views

Internet cuts out and cannot reconnect, DHCP not enabled

Sometimes the internet cuts out and then when I try to reestablish a connection it gives me limited connectivity where I can't access anything. The network problem diagnostic tool can repair the ...
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1k views

Embeded Linux device fails to get DHCP

I'm trying to get an embedded Linux device to use DHCP to get it's IP. I think it is trying, this is from the boot output: Configuring network interfaces: cat: can't open '/var/run/udhcpc.eth0.pid': ...
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131 views

Is there a way to tell the difference between a direct connection and network connection

I want to configure a linux(ubuntu) machine such that when a direct connection is made with another PC my machine will enable a DHCP server and serve it an IP address, but if my machine is connected ...
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399 views

Windows not recognizing local network domain name

I'm setting up a small network for a club that I'm a member of. The layout is a single server with two ethernet interfaces, connected to a wireless router and a wireless bridge. The bridge connects to ...
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56 views

Reserved DHCP Address, now can't access the interwebs

Pretty self-explainitory. Yesterday I reserved a DHCP address for one of my computers and now it cannot access the outside world. It can resolve domain names, but it cannot ping. This is probably ...
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1k views

Access point as DHCP server

My level of knowledge on networking is moderate. I have the following scenario: Our internet connects to the LAN into a normal port (Dlink DS 1008D Switch) Some of the computers in the office ...
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2k views

Xen networking - bridging issues

I do love Xen as a product, but sometimes, I really hate it. I'm having some networking issues with one of my Xen clients sitting on a Debian 6 machine VM (so Xen is running inside a Debian 6 virtual ...
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450 views

How to set custom DHCP option in dhcp request in Windows XP?

DHCP client in Windows XP has built in options. One of them is Requested IP Address. How to set custom IP address into that field? Background: In my local network there is DHCP server that ...
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564 views

Windows 7 DHCP Client won't start

The DHCP server on my Windows 7 machine refuses to start, when I click start in the services control panel I get: "Error 2: The system cannot find the file specified." The 'Path to executable' is ...
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299 views

OpenDNS servers initial response is very slow

I've got a Time Warner cable ISP package (RoadRunner), and the modem they gave me doesn't allow me to specify which DNS servers to use; it always uses whatever the upstream dhcp server gives it. I ...
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0answers
17 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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21 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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12 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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35 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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29 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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14 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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24 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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5 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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37 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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67 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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30 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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38 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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43 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 ...