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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5
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3answers
8k views

PXE Boot Server without DHCP, for many different computers?

I work at a helpdesk for a university where it is very common for us to reformat people's computers using XP, Vista, and Win7 CD's and DVD's. Of course, the discs get scratched and lost a lot. It is ...
1
vote
0answers
330 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 ...
0
votes
1answer
2k views

Gateway setting is empty

This laptop hasn't been used in almost a year. It connected to the internet just fine last time used. Now it can't get on line. ipconfig:The Gateway setting for this computer is empty. Make sure your ...
0
votes
2answers
5k views

How do you set your local DNS name on OS X (so you can reach it from a Windows box?)

On my work network, all the PCs get a local machine01.abc.com-style DNS name. Is there a way to do that on OS X? In a way that machines without Bonjour can see it? (The .local domain name won't work ...
0
votes
3answers
650 views

Vista Home Premium won't connect to network

I deinstalled some software (e.g. some Toolbars for IE and Norton security suite, because the free trial period of 60 days is run out and so i want to switch to microsofts free security essentials). ...
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
2answers
579 views

How do I PXE Boot Only when I want it to without user intervention?

I would like to setup a PXE environment where I can re-image machines remotely without any user intervention. Only problem is when the re-imaging is completed it will do the re-imaging again and again ...
1
vote
1answer
794 views

DHCP disable client DDNS updates

I have a DHCP server (ISC dhcp server version 3) set up on Ubuntu Maverick. The windows client in the network are trying to update their DNS name to the current IP address in the DNS zone by ...
12
votes
7answers
16k views

Why is my subnet mask 255.255.255.255?

I have a modem which used for internet broadband and I got an IP address in the 'A' class 10.x.x.x and have netmask 255.255.255.255. What does 255.255.255.255 mean exactly? When I try to sniff with ...
30
votes
3answers
88k views

Why is Windows' default IP address 169.xx.xx.xx?

My Windows system got an 169.xx.xx.xx IP address the other day, and I fixed the issue, but why did Microsoft chose this address as the default? Why not 1.xx.xx.xx or 255.xx.xx.xx? Did one guy at ...
0
votes
1answer
6k views

ASA DHCP Relay configuration

I have locations in different cities, connected using 2 Cisco ASA devices. my main location, corporate, use the IP 192.168.1.x The second location, remote store, use the IP 192.168.3.x I have a DHCP ...
0
votes
1answer
1k views

Thomson TG585v7 doesn't add DNS entry for Linux PC after giving it IP via DHCP

My GNU/Linux PC (Debian Squeeze; called Iphigenie) gets its IP from a Thomson TG585v7 router. Network access works fine (web surfing, ssh client/server, etc). However querying for Iphigenie via DNS ...
1
vote
3answers
1k views

Cannot open any web page, but MSN Messenger works

I use my computer behind a router. My MSN program can connect to the Internet, but I can not open any web site with my web browser. It seems that this problem is related to DNS because when I input an ...
0
votes
2answers
1k views

How to query a DHCP server to get the local DNS servers

I have a ClarkConnect (CentOS based) box running as my home router on a RR connection. I had the DNS servers set up to use Google's DNS server. I want to change them back to the local DNS servers ...
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 ...
4
votes
2answers
16k views

How do I open the dhcp-client log on Windows 7?

Tried searching the web for answers but my google voodoo isn't strong enough.
1
vote
1answer
324 views

What to do if the dhcp server on a home router doesn't update the hostnames?

first question here... Premise: this started trying to setup a VM for mucking around with some completely unrelated software... since i want to connect to it through ssh, for ease of configuration (...
1
vote
1answer
1k views

Force dhcp client to get a new lease

I have a linux DHCP server running on my network. i recently found out that i can assign specific ip address to clients based on their mac address by modifying the dhcpd.conf file. Now is there ...
1
vote
3answers
8k views

Windows 7: wireless connection cannot renew DHCP lease and falls back to 169.xxx.xxx.xxx IP address

In the last few days a very strange phenomena started occurring in my PC: I have a Windows 7 PC connected via a wireless network to a router. Last week the wireless connection started to reset to ...
0
votes
1answer
2k views

Using dhcpcd to reset manually set interface

Use dhcpcd to get IP address (dhcpcd -p eth0) Manually change the IP address (ifconfig eth0 x.x.x.x) Kill dhcpcd (dhcpcd -k eth0) Restart dhcpcd (dhcpcd -p eth0) In this case dhcpcd will not set the ...
0
votes
1answer
1k views

Netsh commands not working on remote computer

At work, we are in the process of migrating over 200 computers from static IPs to DHCP. The DHCP server is configured. My biggest hurdle is physically going to every single computer in the area and ...
0
votes
2answers
331 views

Can DHCP and NAT co-exist?

I am using a U.S.Robotics 9108 to share ADSL Internet access via both LAN ports and WiFi. Is there a way to allow each Windows 7 PC connected to it to handle its own port forwarding needs, rather ...
2
votes
1answer
714 views

Router issues IP but Laptop does not accept?

I was having issues with my older Linksys wireless router and decided to upgrade to a Linksys E3000. However, after upgrading, I still have the same issues. What happens is that I will be connected ...
1
vote
2answers
9k views

Difference between static and DHCP?

Can anyone tell me difference between DHCP and static IP routing? I am especially concerned about one thing. When I assign static IP to my device, I can not ping it outside office (not from my laptop ...
0
votes
1answer
2k views

Is my D-Link PowerLine AV Starter Kit messing with DHCP?

Yesterday, before I moved into a new house, I had the following setup: 1 x Shaw Cable modem (Motorola, blue) 1 x D-Link Xtreme N Gigabit Router (DIR-655) 1 x Sony PlayStation 3 2 x Apple iMacs 4 x ...
1
vote
2answers
7k views

Can you manually assign IP address that is out of the DHCP range?

If I setup a router/modem to have DHCP range of 10.0.0.1 to 10.0.0.50, How do I manually assign one of the machines an IP address out of that range - eg. 10.0.0.51? I need to do this so that I can ...
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.
0
votes
1answer
2k views

Asus EEE PC 1005HA (XP Home) refuses to connect to Virgin Mobile MiFi

My client has an Asus EEE PC model 1005HA, and we're attempting to connect it to the WiFi network created by a VirginMobile MiFi unit. They also have a MacBook Pro with Snow Leopard that has ...
1
vote
1answer
1k views

Static DNS + DHCP-ed IP in Windows?

I change wifi networks a couple times a day. Obviously they have different DHCP settings, and I always use dynamic ip resolving. However, I want to have the same (say, OpenDNS') static nameservers in ...
1
vote
5answers
583 views

How to resolve odd behavior on wireless router, connections hang until DHCP lease is renewed

I just picked up a new wireless router and I am seeing the following odd behavior and I'd like to understand what could cause such a thing: After having internet connectivity through the wireless ...
3
votes
2answers
237 views

DHCP: Replacing one IP with another

I started having some network problems today and was about to throw in the towel and start finding replacement hardware when I shut the machine down and notices the ping window I left open to the ...
1
vote
1answer
800 views

Windows 7: how to redirect dhcp traffic to alternative port

I was hoping someone could help me find a way to force DHCP traffic to use an alternative port on Win7. I need windows to send and listen for dhcp traffic on a port other than 67/68. I have tried to ...
14
votes
5answers
10k views

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 ...
2
votes
1answer
1k views

Trouble setting up DHCP with WRN2000v2 and GS108 network switch

I have the GS108 Netgear 8 port Gigabit network switch and the WRN2000v2 Netgear wireless router. The problem I am having is that anything conneted through the Gigabit switch is not being assigned an ...
0
votes
1answer
281 views

Problem with dhcp in Debian

I try to have a static ip adress on an host. I execute the following commands : $ ip address eth0 10.4.1.15 netmask 255.255.255.0 $ route add default gw 10.4.1.5 But later my IP address changes ...
4
votes
6answers
2k views

user friendly name for ip address on home network

How can I set up some sort of local DNS service, so that instead of using ipaddresses to do things like VNC and remote desktop a more URL like thing can be used. All the devices on a network have a ...
1
vote
1answer
629 views

DHCP negotiations consistently fails to obtain lease on first try and works on second try

I'm having some problems bringing up my wireless card at boot time on my Red Hat Linux 9.0 box. After some investigation with the boot scripts, I noticed that it was having problems with the DHCP ...
2
votes
3answers
6k views

Could not find DHCP daemon to get information on Belkin G Wifi Router

I am using a Belkin G Wireless Router F5D7234, and i have a DSL connection with only a ethernet cable. So i connected the cable to the Modem port and allowed it to use Dyanmic IP, it worked ...
1
vote
1answer
522 views

Blacklist a DNS server supplied via DHCP

The DHCP server on a network I use specifies a DNS server that I do not want to use. Is there a way to continue to use DHCP but to modify the provided information or to "blacklist" one (of the three ...
1
vote
2answers
1k views

DHCP Lease time

I have computer connected to internet directly. But once every hour IP changes and I do not want that for sure. How can I set IP lease time for like a year or so? Thank you
1
vote
1answer
3k views

fedora, dhcpd fails to start

History: I got a tiny shiny plugserver which I want to plug to my ADSL router (or however you want to call it) on one end (eth0), and the other end (eth1) I want to run a dhcp server for my LAN. ATM I ...
0
votes
1answer
500 views

DHCP server inside a virtual machine can't see other machines

I setup a private network from virtual machines and one of the machines is the DHCP server for the group. I want to specify a next-server for the DHCP server but I'm having trouble connecting to any ...
1
vote
4answers
3k views

2 routers, both DHCP, no IP assigned

I can't get DHCP to assign IP to my wireless devices. My network config is as follows: Nanostation5 Linksys WRT350N, which is connected with Nanostation via its INTERNET port. Nanostation: LAN ...
11
votes
1answer
10k views

Windows clients not using NTP server provided via DHCP

I have a network consisting mostly of Windows Vista and 7 clients and an Ubuntu server. The server provides both the DHCP and NTP services through dhcp3-server and openntpd. In my dhcpd.conf, the ...
3
votes
2answers
1k views

What are ping packets made of?

What exactly are in the packets that are sent via the ping command? I was reading a Wikipedia article about magic numbers and saw this: DHCP packets use a "magic cookie" value of '63 82 53 63' ...
0
votes
1answer
447 views

Use dns suffixes only on certain wireless networks?

quick question. I'm a software guy and networking is all black magic to me! I have a laptop which I use at home and at the office. In order to be able to more easily reference our servers at work, I ...
1
vote
3answers
7k 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 ...
2
votes
4answers
2k views

Linux - use dhcp again to get IP

I had statically set my ip in Linux using: sudo ifconfig eth0 192.168.blah.blah Now I want it to go back to using DHCP to assign the IP. How do I do that? This is what I see when I run dhclient ...
3
votes
3answers
5k 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 ...
1
vote
2answers
855 views

Is there a better way to get dd-wrt to ignore my ISP's 3rd DNS server?

My ISP's DHCP server specifies 3 DNS servers that provide ads on mistyped domain names. I'm using a third party DNS provider that only has 2 DNS servers, but unless I put something in the third box dd-...