Dynamic Host Configuration Protocol (DHCP) allows computers on the same network to automatically obtain a unique IP address.

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Windows 7 computer not renewing ip address on start up unless I reset computer

I recently reinstalled Windows 7, and I noticed that I do not automatically receive an IP address when I start up the computer. When I reset, it makes it get an IP address, and I can surf like ...
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3answers
2k views

Add a static IP alias to a DHCP interface on Windows 8

I have a Windows 8 machine that has only a single Ethernet port. It needs to use DHCP and also needs a static IP. Each IP is in a different subnet, and each serves a different, incompatible purpose. ...
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230 views

Every time I ping one of my Ubuntu VMs from another VM I get a different IP resolved.. how could this be?

Every time I ping one of my VMs from another VM by hostname I get a different IP address resolved for it... Both VMs are Ubuntu 12.04 running on VMware Workstation 10. All VMs are running with ...
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1answer
63 views

Can't connect to server when router is unplugged

So I have a network here where all computers are connected to a switch, including a local server. The router is connected to the switch which supplies the internet. It is also the DHCP server. Does it ...
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44 views

I have a small computer with DHCP, but what makes it publish names to clients?

Set up a small ARM computer (cubox) with Debian. That has three NICs, one Internet, two local net. Basically, this is a router with a bridged interface (br0) and firewall. DHCP-server ...
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1answer
4k views

Getting 2 IP addresses on one network card, using DHCP

Given: A computer running Linux (CentOS 5.x), one network card connected to LAN switch, a second one to cable modem via crossover cable. This computer acts as a router/firewall/traffic shaper for the ...
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4answers
576 views

MacBook Pro with OSX 10.6.3 (Snow Leopard) Wi-Fi network connection breaks after few minutes

I have a MacBook Pro with OSX 10.6.3 (Snow Leopard). After connecting on a Wi-Fi network, the connection "breaks" after a few minutes. What I mean by "breaking" is that all requests, whether it is ...
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1answer
288 views

Forcing resolver to OpenDNS's servers

I'm trying to configure Debian as a router/gateway on my network with eth0 going to my ISP's modem and eth1 to my LAN. eth0 needs DHCP so that it gets the proper IP address from my ISP modem, but in ...
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174 views

Can't get IP on Windows 7 after (even more) extensive troubleshooting

I posted here a while back about a problem pulling an IP from my router's DHCP on a Windows 7 machine. Since posting that message, I've taken even more drastic steps, but I still can't pull and ...
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306 views

DHCP settings out of range Internet shuts off after a few minutes

I recently upgraded from windows eight to windows 8.1 I do not know if this has anything to do with anything I have a 64 bit OS. My Internet goes off by itself every 5 minutes even though my wireless ...
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1answer
299 views

DDWRT: Is it possible to define the same ip for two different Mac-Addresses?

Is it Possible to configure ddwrt in such a way, that the dhcp server leases the same static ip (in my case 192.168.2.1) and hostnames for two different mac-adresses? I have ethernet and wifi in my ...
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Accessing a router which isn't a DHCP server

I have a Linksys WRT54GL router with Tomato installed on it. My network configuration requires me to disable the DHCP server on the router. After disabling it, I do not know the IP of the router ...
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1answer
3k views

Change default DNS server in Arch Linux

I'm in Viet Nam and most social websites (Facebook, Twitter and the likes - even reddit) are blocked by the ISP DNS server. I tried to change the DNS server of my Arch box using the resolv.conf file, ...
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198 views

Setting Up Port Forwarding For Foscam Camera With Apple Airport Extreme

I am trying to setup a Foscam FI8189W IP Camera to work with my Airport wifi network. I have tried to follow the instructions that Foscam has given but I believe the problem is with my Airport setup. ...
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217 views

how to access two subnet in one NIC?

I am wondering if it is possible to use one network card to access two subnet in windows. I need to access a (LAN) local ip 192.168.0.5/255.255.255.0 and WAN with DHCP. I google that someone suggests ...
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44 views

Access to VirtualBox guest VM across multiple router hops

On an FC18 guest VirtualBox VM (a), I have bridged networking configured with DHCP. Using the DHCP address, it is possible to ping this guest from the host (b) as well as from other systems (c) on the ...
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1answer
3k views

TP-Link router sometimes fails to negotiate proper IP address

I'm trying to fix the WiFi connection of a family member. They get their internet from a cable modem. The modem is connected to a device that looks like a small Ethernet switch. This switch is ...
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2answers
4k views

What is the “Alternate Configuration” tab in TCP/IP settings

As I know there is two choice for configuring a computer IP address in the network. Assigning a Static IP or obtaining a dynamic IP from a DHCP server. But what is the Alternate Configuration in ...
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IP address alias assigned by DHCP

I would like to create several aliases to eth0, but have the addresses assigned by DHCP instead of being set to static IP's. Is this even possible? All the examples I've seen assign a static IP using ...
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1answer
509 views

Unidentified network on windows 8 pc when hard wired to Airport extreme

I have a weird problem which not been able to resolve as of yet. Okay so let me explain, I have recently had fibre optic installed, and I decided to use a new Airport Extreme (instead of the router ...
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1answer
386 views

Windows doesn't send DHCP Request after DHCP Offer

I'm just at a friends place and we have problems with the WiFi. Scenario is, there are (about) 8 Android devices, all without any problems logged in to the WiFi and connected to the internet. Also, ...
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2k views

Disconnect other users from DHCP client list

When I log in to my modem webpage I can see lot of employees are connected to WiFi network. This is okay. I have full access to the system and i want to disconnect the particular employee from the ...
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1answer
3k views

Which clients accept DHCP option 42 to configure their NTP servers? [closed]

From what I can tell based on observations of my own OS X 10.8.5 machine, and the information in "Windows clients not using NTP server provided via DHCP," neither OS X nor Windows 7 are able to ...
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1k views

Make dhcp assign same IP and hostname for different interfaces at one machine

I have a feeling that question itself looks stupid but it is not. Please let me clarify. I have dynamic DNS with BIND and NIS configured at my LAN and have laptop which I am using in both wireless ...
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1answer
689 views

Linux environment is overriding network configuration. How to stop this?

I have an ARM system that has been pre-loaded with some variant of Linux. I don't know the distribution; I can only see the kernel number in dmesg. In /etc/network/interfaces, I set eth0 to auto ...
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2answers
402 views

Set up internal DNS to point to that DNS server?

I have Windows Server 2008 running on my network with the following properties: Internal IP: 192.168.1.100 External IP: 242.24.124.12 Now I have registered a domain (example.com) and have it ...
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3answers
105 views

How to retain a unique IP on a client with a static IP in a DHCP subnet?

When I say DHCP subnet I mean that the clients are intended to receive their network configuration via DHCP, not statically. Let's observe the following situation: I set up an IP address ...
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1answer
746 views

How can I find out IP adresses of DHCP clients when I setup internet connection sharing with Network Manager (Linux)?

I sometimes configure routers with my laptop and use connection sharing with Network manager and so my laptop acts as DHCP server. I then need to connect (via ssh usually) to the servers that are DHCP ...
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208 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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3answers
4k views

How do get Ubuntu to stop modifying /etc/resolv.conf [duplicate]

I want to manually set my resolv.conf and have Ubuntu not automatically change it later. How do I get Ubuntu to stop modifying resolv.conf? I have already set "Automatic (DHCP) addresses only" in ...
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1answer
4k views

Connecting router (SMCWBR14S-3N) to modem (SB6121)

We recently purchased a Motorola SURFboard SB6121 modem and activated it with Comcast. After the technician activated the modem, she instructed me to connect a computer to it and try to go online. ...
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3answers
859 views

Does NAT Map to the MAC Address, or to the Local IP?

I would like to set up NAT to put a service on internet using my Technicolor TG 582 router. I mention the specific router model just to have a reference, but the question goes in general as I may ...
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260 views

Onkyo UWF-1 networking issue

I recently bought an Onkyo TX-8050 network stereo receiver http://www.onkyo.ca/Products/model.php?m=TX-8050&class=Receiver and a UWF-1 wireless dongle ...
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1answer
63 views

My computer does not use DCHP, it only uses default adress? No network access

Recently one of my computer's network connection stopped to work. When I did an ipconfig I saw that the NIC was using the IP address outside the range of my DCHP server, something like ...
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169 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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3answers
1k views

Network is not connecting after startup automatically in Windows

After some perturbations with network drivers now I have a situation where the network is not connecting automatically after the boot-up. It indicates, that the connection is limited or no ...
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287 views

can't obtain ip-address from my dhcp

I can't obtain a ip-addres from my dhcp-server and it's going trough a firewall (pfsense), The firewall(pfsense) and DHCP server are two virtual machines on my physical server(ESXI). As rules i use ...
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23 views

Create a Home Network for File Sharing and access Internet at the same time

I have 2 hosts A (Windows) and B(OSX) with a couple of mobile devices in my network. When I enabled File Sharing on my hosts, I noticed that their IP's keep on changing which is annoying sometimes. ...
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2answers
5k views

“dhcpd failed” error when starting DHCP server

I am setting up a DHCP server on Debain (virtual machine) on Ubuntu 12.04 host, but unable to get it up and running. My configuration is like this, dhcpd.conf ddns-update-style none; option ...
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1answer
39 views

DDNS in BIND9 with custom records

I have BIND9 and DHCP configured to communicate with each other for providing DDNS in my network but I need to also setup custom records as some machines need to respond to more than one hostname. ...
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589 views

Can't access domain shared folder by name but I can by IP

I have computer with windows server 2008 r2 and a router works as dhcp server. I created a domain on the server and I created users. I made the clients access the network via new users of domain then ...
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1answer
294 views

Wireless to Wired Bridge with Bonjour Service Clients

I want to create a wireless to wired bridge on my rasbian powered Rasperry Pi to connect my DVB-T box to the network. The DVB-T box sends the signal into the network using Apple's bonjour service. To ...
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3answers
6k views

dhcp option 252 what is it?

All over the internet I see example of how to set up dhcpd with WAPD proxy auto configuration using DHCP. In the /etc/dhcpd.conf file There are statements like this. option wpad code 252; ...
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2answers
353 views

DHCP and 169.xxx.xxx.xxx [duplicate]

I have been seeing this a lot at work and at home. At home, a single device will not obtain an IP from the DHCP so it self assigns an IP in the 169.xxx.xxx.xxx range. If I put in a static IP it works ...
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1answer
449 views

In Windows 8, How do I make a static IP for each network?

I would like to have it so that my computer sets its IP address statically depending on which network that it is connected to. I have 3 Networks that I regularly use and it seems that with Windows I ...
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1answer
623 views

DHCP server with multiple interfaces on ubuntu, destroys default gateway

I use Ubuntu, and I have many interfaces. eth0, which is my internet connection, and it gets its info from a DHCP-server totally outisde of my control. I then have eth1,eth2,eth3 and eth4 which I ...
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1answer
681 views

Stop DHCP services on Linux - Ubuntu

How do I stop DHCP services on a particular ethernet port in Linux ? I was trying to take full control of an ethernet port of my computer to inject packets into the device plugged into it without ...
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2answers
1k views

How to configure my 2 router to make them as access points

I have this broadband and the main wireless router: Main Router Also I have two other routers and would like to make them as access points. So All with the same SSID, then the device can choose the ...
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1answer
541 views

Router's DHCP not working after a Windows machine is connected

In my office, there are several computers that are connected to a router/access point. Everything was fine until my wife came in with her laptop. It's on Windows 8. Sometimes, other computers cannot ...
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4answers
6k views

Can I Chain Two Routers Together Keeping DHCP on Both?

I have read that I can connect a second router by turning off DHCP and NAT, but I want the second router to assign DNS (I'm using it as an access point for my kids, and will use OpenDNS family service ...