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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“Network Scan” gives “DHCPServer FAILED”, but it's checking the wrong address

When I do a "Windows Help and Support Center" "Network Scan" on my XP SP3 machine, it tests a very long list of various things. All are marked "OK" except: > DHCPServer 192.168.0.1 (FAILED) > ...
3
votes
2answers
157 views

home network question regarding dhcp

My home network consists of a cable modem provided by the ISP, which is connected to a switch, from the switch 1 cable runs to the digital tv decoder/recorder also provided by my ISP and another cable ...
3
votes
1answer
1k views

Disabled DHCP server on secondary routers, cannot access setup page anymore on those

I have the following network configuration in my home: The Telsey DSL modem+router is provided by my ISP and setup configuration page is password protected from them (not default one, I tried brute ...
3
votes
3answers
12k views

How can I override comcast's wonky DNS settings in the router resolv.conf?

Whenever I connect my laptop to my Xfinity router (TC8305C), it writes wonky settings into my resolv.conf. Rather than completely hard-codinging the settings on my laptop, can I override the settings ...
3
votes
1answer
445 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 ...
3
votes
1answer
2k views

Systemd-networkd: How can I prepend a static nameserver entry to DHCP-discovered nameservers?

I'm using systemd 213 on Arch Linux, and systemd-networkd/resolved with DHCP to connect to the internet. I'm also running a caching DNS server on 127.0.0.1. I'd like to make this server the first DNS ...
3
votes
2answers
8k views

Will disabling NAT on my wireless router cause a performance hit on my DSL router?

I have a Thomson TG508v2 router/modem and a brand new AirPort Extreme connected to it. At first, I set the AirPort Extreme to "share a public IP", which enables DHCP/NAT. Everything works great but I ...
3
votes
2answers
578 views

MacBook Pro not obtaining IP address after replacing logic board

I just got my MacBook Pro back today from having the logic board replaced. While in the Apple store the Internet worked ok. I got home and it was able to connect to my WiFi, but could not obtain an ...
3
votes
4answers
3k views

Static IP in LAN with DNS name

I have a LAN at home sitting behind the router (Linksys WRT54G). The IP addresses assigned to the Linux boxes are 192.168.0.101 192.168.0.102 192.168.0.103 The Router is also connected to the ...
3
votes
1answer
913 views

Windows Server 2008 is not showing DHCP-Server configuration in Server-Manager

I've successfully installed the DHCP server role on my Windows Server 2008 R2. After configuring everything, DHCP is working just fine. I can configure the DHCP server via Start -> Programs -> ...
3
votes
3answers
4k views

LinkSys router suddenly cannot get an IP address

I have a linksys router WRT54G2 connected to a cable broadband. Just last week, everything was working perfectly - I would be able to connect my laptop to the internet using WiFi. However, starting ...
3
votes
2answers
717 views

How to set up DHCP-configured access through a Linux box?

I would like an old desktop box to use my laptop as a router to access the internet. Here is my setup: I have one ethernet port in the side of my laptop which I want to use to get internet access ...
3
votes
4answers
2k views

Wireless DHCP doesn't work until wired Ethernet plugged in

A client of mine has an Asus R1F tablet running Windows XP Tablet SP3. It has an Intel 3945ABG wireless card; wired Ethernet is a Realtek something-or-other. In the past few days, it's developed an ...
3
votes
0answers
70 views

How do I have one OpenWRT router use the DHCP server of another OpenWRT router?

I want one router to be able to access the devices connected to the other router. However one router is connected to the internet modem by ethernet, and the other router is connected to it by wireless ...
3
votes
0answers
461 views

Beaglebone DHCP Server Assigns its Own IP Address

I'm trying to run a DHCP server on my Beaglebone Black (running Debian), and I want to give it a static IP address - 192.168.17.1 - but it keeps assigning itself its own different IP address - 192.168....
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votes
2answers
667 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 ...
3
votes
1answer
4k views

How can I determine the IP addresses allocated by DHCP on a router that I'm connected to?

This “router” is not a typical situation. I’m using my phone as a hotspot and can only configure a select number of DHCP options. I can manage the limit on how many devices/clients can use my phone ...
3
votes
1answer
1k views

How to make WinServer's AD work with Linux DNS/DHCP on VMware?

I got 2 virtual machines : Windows Server 2008 with Active Directory installed. Linux that works as a DNS and DHCP Server I need to make them work together, but I don't if this is going to be ...
3
votes
3answers
5k views

No internet connection when connected via wi-fi, but fine via ethernet (DD-WRT)

I just bought a new router and installed DD-WRT on it. When I connect to the router via wi-fi, I cannot get an outside internet connection (and in fact, can not connect to the router admin interface ...
3
votes
1answer
7k views

Ethernet connection shows unidentified network with no internet access

For years I've used a physical Ethernet connection for my internet access, then a few days ago it went down and said it was an unidentified network with no internet access. I dug out a wifi card and ...
2
votes
1answer
49 views

Does the DHCP server allocates static IPs?

I have a small DHCP server with a 50 IP scope. When I try to get an IP to my device using Ethernet I get a static IP. How can I solve this?
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votes
2answers
667 views

Can only ping on LAN, not internet

I have 2 computers running Ubuntu 12.04 connected to a router on the 192.168.3 subnet. This router is connected to another router via the first router's modem port, so the 192.168.3 router has access ...
2
votes
3answers
11k 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; "...
2
votes
1answer
2k views

Why is my static IP address different if I plug in a router?

I just purchased a static IP package from my ISP, and was told the IP was something like 24.x.x.x. And they assigned the static IP to the modem. So, if I plug my cable modem directly to my laptop, ...
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votes
2answers
2k views

In OS X, how can I prepend 127.0.0.1 to the list of DNS servers obtained through DHCP?

I am trying to use dnsmasq to resolve certain known domains using its configuration, but let the rest of the requests go through to the normal DNS server assigned by DHCP. I cannot get this to work. ...
2
votes
2answers
738 views

DHCP Reservation vs Mac address filtering. Are they the same security?

I am able to give an ip address to a wired/wireless device based on the mac address. Other automatic DHCP is turned off. Is this as effective as a security measure as MAC filtering? It just seems ...
2
votes
1answer
15k views

Using Macbook pro ethernet as a DHCP server

I'm developing an arduino project with an Ethernet shield. In order to simulate that the arduino is connected to a router i simply want to make the Macbook act as a DHCP server and give the IP to the ...
2
votes
2answers
1k views

Automate static and DHCP switch

Is it possible to automate switching the DHCP and Static IP usage for a specified interface in Win7? I have an AP connected to an other and when the other AP goes offline it does not give my PC an ...
2
votes
2answers
5k views

Accesing internet with Host-Only network VirtualBox

I have two VMs in my VirtualBox. Both are FreeBSD and should communicate between each other. I have created network with DHCP enabled and set like this: Server Address 10.10.10.1 Server Mask 255.255....
2
votes
2answers
573 views

How can I setup a router to assign IP addresses to all connections through a 24-port hub?

How can I do that? Also is there any router that is already ready to handle something like that? Is there any other recommended setup to solve this problem. This is a relatively low budget (probably ...
2
votes
2answers
694 views

DHCP not issuing out IP addresses

DHCP on my network is no longer issuing out IP addresses. Every new device must be manually configured to connect to the network. After executing show ip dhcp binding, i noticed that all the ip ...
2
votes
3answers
4k 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 ...
2
votes
1answer
10k views

How can I tell DD-WRT DHCP to assign same IP to the same device?

I installed DD-WRT mini image on my router. I have a board that gets rebooted a lot(development device). It is very frustrating that my board keeps getting different addresses every couple of reboots. ...
2
votes
3answers
159 views

what is the work of dhcp

hi all I am little bit confused about dynamic and static IP concept.What is dhcp and What actually DHCP does.Please provide me some idea about IP,Port and DHCP.
2
votes
2answers
297 views

DNS / DHCP Issues

I just got back from a site visit where I had to use a fixed IP, gateway, and DNS address. When off the main network there, I used a USB 3G modem with no problem, but as soon as I got home, I could ...
2
votes
1answer
742 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 ...
2
votes
1answer
4k views

Linux/CentOS how to permanent inititate DHCP Client any reboot?

In my CentOS, i need to run dhclient -v command at every time i start/reboot the server. How to make this permanent please?
2
votes
3answers
17k views

Why can't my router connect to Internet?

I have UPC internet connection (chello.pl). My router is D-Link DIR-300. When I use provided modem to connect to the internet there is no problem. When I try to do it via router, I can't get a ...
2
votes
3answers
1k views

ad blocking host file, shared to all computers on local network

I currently update my local hosts file with advertising server domain names and direct them to nowhere. Well, almost nowhere. I point them to 127.0.0.1 and I don't have a web service running so it is ...
2
votes
1answer
7k views

Unique IP address settings (static/dhcp) per wireless network? [duplicate]

Possible Duplicate: Automatically picking network settings based on the wifi network Is this possible in Windows 7? For example, I want to use Static IP A with Network A, DHCP with Network B, ...
2
votes
2answers
212 views

Using DHCP manual/auto independantly from DNS manual/auto

I've read several definitions for DHCP and DNS on various sites. They all sound like they are 2 VERY different things. Why does Windows XP's property tab allow/disallow 1... when you allow/disallow ...
2
votes
2answers
1k views

How to keep a static network local IP for all the connected machines, and still dynamically assign all the incoming ones?

I have read the manual and could find no word on this, so I'm asking here. I have a couple Macs on a wireless network, this router model: http://homesupport.cisco.com/en-us/wireless/lbc/WRT54GL Now, ...
2
votes
2answers
4k views

How can I get a new IP from DHCP?

I connect to internet via my dorm's ethernet and IP addresses are assigned by DHCP. I tried sudo dhclient -r dhclient but that doesn't work. are there another commands i can issue? p.s: I don't ...
2
votes
3answers
515 views

My Very Own DHCP Server

My home network is as follows: Cable modem for internet, connected to a wireless router, multiple clients connected over the wireless network. My wireless router has a builtin DHCP server that assigns ...
2
votes
5answers
14k views

Setup Linksys WRT54G to use modem`s DHCP server

i cant figure out how to set Linksys WRT54G Wireless Router to use modem`s DHCP server. My network scheme is like this: [COMCAST MODEM] <=> [HUB] | | [LINKSYS] [...
2
votes
3answers
4k views

Setting the IP with dhcpcd

I have a setup where my system is in the regular home network connected to the router. The router assigns the IP to my device without issues. I would like to use the same IP every time for my device. ...
2
votes
2answers
4k views

How to get both IPv4 and IPv6 dynamic address

Running dhclient gets me an IPv4 address. Running dhclient -6 gets me an IPv6 address. And the man page says you can't combine v4 and v6. So how to get both v4 and v6 addresses at the same time?
2
votes
2answers
10k views

Running two wireless networks, with two different DHCP ranges (Virgin Media superhub woes)

I'm trying to create two wireless networks in my house, that would provide the client devices different ip address ranges and DNS settings, depending on which network they connect to. My current ...
2
votes
2answers
146 views

Reserve DHCP slots for certian users?

My company has alot of outside suppliers and contractors who need access to our wifi network. Currently, we only allow DHCP to hand out 20 addresses for our quest Wifi network. This typically fill up ...
2
votes
1answer
3k views

Default to Static IP when no DHCP is found

I've setup a DHCP server on one of my centos boxes, and I have several computers that are going to connect (also centos) and hopefully make use of the DHCP. On start-up I'd like to check whether a ...