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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4
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2answers
911 views

What are the benefits of dynamic leased IP addresses in a home network?

I have a small network at home with a router, a printer, a NAS and 4 PCs. My router allows full DHCP management and I have set my router, NAS and printer to have static IP addresses (reserved fixed ...
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' ...
3
votes
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 ...
3
votes
3answers
7k views

Netgear router/powerline adapter assigning wrong IP address via DHCP

I've got a problem with my router and powerline adapter, for some reason my router and powerline adapter assign odd IP addresses to me network devices, but not all of them and not all the time:/ You ...
3
votes
1answer
577 views

OS X location aware networking

I have a macbook running OS X 10.6.2. I would like to be able to use DHCP when roaming, but automatically switch to a static IP when my macbook is in range of my home router. Right now I must manually ...
3
votes
4answers
10k 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 ...
3
votes
2answers
6k views

DHCP table in Debian

How to view all assigned ip addresses on a Debian DHCP server? It is usually easy to do on a standalone router through a web interface. How to do it with dhcpd in Debian?
3
votes
3answers
3k 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. ...
3
votes
2answers
18k views

Wrong IP address when pinged from another machine?

I recently got a new computer at work and I'm having trouble connecting to it from other computers. I can access other computers from it, just not the other way around. I checked all the usual ...
3
votes
2answers
645 views

No route to host after changing interface to static ip

I installed a Linux (Ubuntu) server inside my home LAN, initially it's automatically configured to use DHCP interface. I'm connecting to this server from another computer using that server's hostname. ...
3
votes
5answers
2k views

security webcam, but NATted dhcp ip address

I would like to install a webcam (better if an independent ethernet based object) at home, and access it from outside while I'm abroad, so I can check if there's mail. However, my internet connection ...
3
votes
1answer
4k 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 ...
3
votes
2answers
182 views

What type of router (non wifi) for DHCP assignment?

So I have a pretty large house that use to be connected to a business network that had a DHCP server. However we've disconnected that business network and put in residential internet so I need a new ...
3
votes
2answers
4k views

Ubuntu box keeps dropping wired network connection

good morning all. Odd one for you... I have an Ubuntu box, 11.04 x64, running on a Dual Opteron SFF box (iWill ZMaxDP... pretty old machine). Up until a few weeks ago, it was acting as a Windows ...
3
votes
2answers
235 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 ...
3
votes
1answer
4k views

How can i assign multiple IP addresses to an NIC (possibly software solution)?

I am connected to a network that assigns my IP address via DHCP, but i also need to assign my NIC an IP address that is not in the network's address range. Is this possible, maybe with some "virtual ...
3
votes
1answer
290 views

ZyWall USG 200 assigning many IPs to one device

Running a network behind a ZyWall USG 200. Our subnet has around 100-110 devices connected at any particular time. Recently some users were having trouble with getting a DHCP address (keep getting ...
3
votes
1answer
532 views

Why does my (home) router append a DNS suffix?

I wonder if any other people have come across this. I've rented rooms in two houses this year, and they both have Sky (a UK ISP) Broadband routers. For some reason, the router I currently use hands ...
3
votes
3answers
5k views

What happens when router has been set to incorrect time?

I have a D-Link router for my home Wi-Fi network. Everyday at least once the internet suddenly goes down. I am simply not able to connect to the Wi-Fi network. If I just restart the router, it starts ...
3
votes
2answers
997 views

“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
148 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
2answers
499 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
2k 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
624 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
1answer
10k 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.
3
votes
3answers
3k 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
677 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
2answers
395 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
714 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
3k 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

PC does not get ip address from router using wired connection

I have an ASUS WL-520GU wireless router with four LAN ports. When my laptop is running Windows 7, and I make a wired connection from the laptop to the router, the laptop does not get an IP address. ...
3
votes
1answer
2k 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
3answers
2k views

Can DHCP provide DNS addresses when IP is static?

In Windows, when I select static IP (instead of DHCP-assigned one) I have to enter the IP address for DNS servers. Is there a way to manually set IP address yet obtain the DNS addresses from the DHCP ...
2
votes
4answers
1k views

How access network computers by name

I have a local home network. The computers get IP address from a router via DHCP. So the address are dynamic and change. How can I assign names to computers to be able refer by name? One computer is ...
2
votes
2answers
397 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
12k views

My first home network setup with a wireless router and switch

I just got a Linksys SRW224G4 switch (24 10/100, 4 10/100/1000) I already have a Linksys WRT54GS router. (I know it's old, but it works) My problem is that well, I have no idea what I'm doing. I ...
2
votes
1answer
1k 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, ...
2
votes
2answers
13k views

Pinging own machine returns an IPv6 address instead of IPv4

When I ping my own machine I get an IPv6 address: Reply from fe80::1004:p8f0:9e40:a42c%10: time<1ms Reply from fe80::1004:p8f0:9e40:a42c%10: time<1ms I used to get the IPv4 address (eg. ...
2
votes
1answer
538 views

NIC card using strange IP address

I'm using Windows Vista on a laptop, and while my wireless card works fine and takes the address the wireless router's DHCP server gives it, for some reason when I plug my (built-in) laptop NIC port ...
2
votes
2answers
519 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
3answers
1k 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
3answers
148 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
291 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
443 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
2k 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
11k 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
888 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
2answers
198 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, ...