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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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 ...
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 ...
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
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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 ...
2
votes
1answer
117 views

Windows 7 ignoring DHCP Offer packets

My laptop with Windows 7 can't renew it's IP address via DHCP. I've tried both my ethernet card and my WIFI card, and I got nothing. It stats fine when I log in in my session after a reboot, but after ...
2
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1answer
84 views

How can the DHCP routers option work if it's my own IP address?

I'm setting up a T-Mobile USB 4G data modem on Ubuntu 14.04 and I'm not making sense of the DHCP lease that T-Mobile gives me. Specifically, the value of the "option routers" is identical to the ...
2
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1answer
984 views

Will Windows renew IP address sometime after “ipconfig /release”?

On a Windows 2000 PC, I did a "ipconfig /release" to disconnect it from the network. After about 6 hours, I checked it again and it was still disconnected. But then about 17 hours after that, I ...
2
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1answer
746 views

Windows failing to renew IP lease

Approximately a month ago I started experiencing a minor, but frustrating problem: my internet connection would drop for several seconds every two hours. My quick investigation showed that these ...
2
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1answer
77 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 ...
2
votes
1answer
58 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. So,...
2
votes
1answer
1k views

How to reload DHCP client remotely, in order to write new resolv.conf?

I'm trying to configure dnsmasq(8) on a Debian GNU/Linux system in a private DHCP-based network. During a local, manual setup - after installing dnsmasq istelf - one could simply include the line ...
2
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1answer
138 views

Reliable cross-platform way of determining hostname from IP address

Within the DHCP table of a router, clients that have sent their network name are listed with IP and MAC addresses. I need a way to get the host names that clients have sent. The router does not store ...
2
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1answer
1k views

Failed to connect to server: The requested address is a broadcast address, but the appropriate flag was not set

My server IP address starts with 128.xxx.xxx.xxx and my laptop gets its address as a DHCP and is of the for 10.254.xxx.xxx I configured the server to look for my laptop and when I start the server it ...
2
votes
1answer
411 views

Change IP based on AP

I connect to 8 different Access Points, each with a separate subnet and each location does not allow DHCP. I want my computer to change my IP address to an assigned IP address per location based on ...
2
votes
1answer
688 views

dhclient overwriting resolv.conf

I'm setting up virtual dev environments and I want the hostname.domain to be something specific, eg- "barney.local". However my /etc/resolv.conf file keeps getting nuked because i'm using DHCP. I ...
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1answer
32 views

Static IP to LAN ports - OpenWRT

I have TP-Link TL-WR841N router and I had install OpenWRT firmware on it. I want to use it on a experimental project which requires me to set static IPs for LAN ports on router as mentioned in below ...
1
vote
1answer
41 views

Configuring router(s) for point to point link with users only on one side

Our home is on an island about 3 miles offshore. We use a wireless point-to-point link for Internet access. Our ISP supplied all-in-one cable modem/router resides in an electrical box on the shore. ...
1
vote
1answer
662 views

Multiple virtual network adapters with their own MAC address and external IP address from the DHCP in Windows

I have been searching for a long time on this forum, and although there are many questions about the topic, I wasn't able to get a concrete solution to the problem. I want to have multiple IP ...
1
vote
1answer
69 views

Why unconnected network card periodically sends DHCP requests?

I have a PC with windows 7 OS. The PC has two network cards, one built-in 100Mbit, one PCI-E 1Gbit. The 1Gbit interface is connected to a linux-based router with DHCP server. The server provides valid ...
1
vote
1answer
2k views

Network interface configuration on Debian 6 (No DHCPOFFERS received)

I am trying to configure an interface to allow internet connection on a home server which runs Debian 6 x86. The server is behind a router which has DHCP enabled. The router IP is 192.168.1.1 with ...
1
vote
1answer
798 views

dhcpcd overwrites NetworkManager's /etc/resolv.conf

I have an Archlinux machine. The IP is set to a fixed value, configured via the NetworkManager. When I tell the NetworkManager to connect with this configuration it successfully updates my /etc/resolv....
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694 views

dhclient “Can't bind to dhcp address” error

I keep getting the following error message from dhclient upon starting of the Network Manager: Can't bind to dhcp address: Cannot assign requested address. Please make sure there is no other ...
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0answers
37 views

Easy: Why does `network` command keep looking for an old router?

What am I missing in this manual dhcp configuration? I'm using CentOS 6. From Redhat's page I've setup a manual configured dhcp client: The /etc/sysconfig/network file should contain the ...
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511 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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314 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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3k views

How to fix DHCP giving out numerous bad addresses

Where I work we have run into a major issue a few times in the past month. Our DHCP server will randomly start filling up with BAD_ADDRESS. We have 3 sections in the subnet. (4.x, 5.x, and 6.x) Aside ...
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0answers
886 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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0answers
221 views

Bypass bug in router's IP address assignment

I have an laptop running Ubuntu connected to my home network. My home network connects to the outside world through a NETGEAR CG3000 gateway that acts as a DHCP server. My laptop normally uses a ...
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0answers
149 views

Strange Networking Setup — Two ISPs to one household

I have an interesting networking problem that I am trying to solve. I have two ISPs into my household. I have Verizon DSL, which I use as my primary connection to the internet. I also just got Time ...
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64 views

How can I restart my routers DHCP to the first starting address?

I just changed my router's IP from 192.168.1.1 to 10.1.1.1. My local IP before was 192.168.1.124 and now it is 10.1.1.124. How can I make it 10.1.1.100 (100 is the starting number for my DHCP ...
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428 views

Can I configure and use 2 DHCP servers in my Home Lab Setup

I am setting up a Home Lab environment for development and testing. The purpose of this lab is multifunctional and the hardware involved is : Cisco ESW 540 24 Port GB Switch with VLAN etc... HP ...
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337 views

Router DHCP wireless vs. LAN entries, Internet Connectivity Issues

I own a Linksys E1500 router. Given the DHCP client table below: COMPUTER has a Wireless interface entry but no LAN interface entry. Does this mean the router does not detect COMPUTER to be ...
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57 views

Host Not reachble on a Network Interface

I have two network interfaces on my linux system. When I select eth0 as default gateway , everything works fine. I can connect to the system from other computers, but when I select eth1 as default ...
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0answers
472 views

udhcpc: How can I get the result of requesting option?

I use commond line like this: udhcpc -O domain But the teminal only shows like this: Sending discover... Sending select for 192.168.X.X... Lease of 192.168.X.X obtained, leasing time ... So ...
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0answers
1k views

WNDR4500 DHCP Passthrough not working

I have a 2Wire Internet gateway with DHCP running. I have added a NetGear WNDR4500 to provide Wireless N and network attached storage (USB via WNDR4500). I have a media server connected to the 2Wire ...
0
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0answers
2k views

Ubuntu Server 11.10 interfaces file unreadable

I am configuring ubuntu server 11.10 to go from dhcp to static and whenever I try to restart my networking manager, I get the error: command ran: sudo /etc/init.d/networking restart ...
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313 views

Connecting PC with static IP to netbooter

I am trying to connect a netBooter to a computer with a static IP address. The instructions in the netbooter ( http://www.synaccess-net.com/support.php ) say that I can connect the netbooter directly ...
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229 views

1:1 NAT IP address using iptables

Suppose I have 2 internal networks: 1.1.1.0/24 and 1.1.2.0/24 I would like to NAT a specific IP address from one network to the other, in which the new address would be obtained via DHCP. For ...
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104 views

How to electronically determine if ISP assigns DHCP addresses in RFC1918 range

Is there an electronic method/protocol/public-website that I can use to definitively determine whether or not my ISP assigns (RFC1918, Private_network) addresses for DHCP assigned addresses? I ...
0
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1k views

DHCP Client Can't Find DHCP Server

I currently have 3 machines: CentOS (router) eth1 - 18.0.168.1 eth2 - 145.165.34.1 Windows Server 2008 (server) 18.0.168.2 DHCP scope - 145.165.34.10 - 145.165.34.20 Windows 7 (client) Supposed ...
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225 views

Windoews 7 doesn't Take the right IP configuration when it set to obtain IP automatically

Every time I connect to a network wireless or LAN The laptop does not take the right IP Configuration while the adapters are set to obtain the IP Configuration Automatically, after connecting to the ...
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6k views

What causes my desktop computer to lose its internet connection on a wired LAN?

Please help! I am at my wits end. I am by no means a techy, but I feel I am intelligent enough to read these forums and follow directions, but I digress... My issue, I have a very simple home network ...
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61 views

Network connectivity

I have a switch in my room with 2 machines connected. There is another switch in another room connected to a DHCP server. One of the two machines in my room can access the network past the switch in ...
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0answers
137 views

Windows 7 drops connection when searching for another computer

I have been struggling with this issue now for a week. Here's the basics behind things... First of all, the main firewall/DHCP Server/et al for my workplace is a SnapGear SG850. Until recently, ...
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0answers
633 views

DHCP Discover with no Client Identifier (Internet Radio incompatible with Netgear and Linksys routers)

I have a Sangean DDR-63 internet radio (innards made by Frontier Silicon). If I use my Verizon WiFi cellular modem hotspot it works fine (but that's expensive). Connected directly to my cable modem ...
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0answers
1k views

How to Configure a Hotplugged Network Interface with a Static IP Address

I have a device that I connect to my host Ubuntu machine via Ethernet over USB. It shows up as usb0 in ifconfig and the device always has the same address: 192.168.0.1. I have the following two ...
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0answers
353 views

Diagnosing an Internet Radio's network problems

I bought an Internet radio: a box with speakers, built-in CD player and FM tuner, Ethernet connector, WiFi antenna etc. It's a new model, released about 6 months ago. When I try to set it up, ...
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631 views

Laptop can't find the DHCP server

My laptop (Acer Aspire One running on Windows XP) isn't connecting properly to the router we have (2WIRE, At&T UVerse DSL). When I try to connect, it gets stuck on "Acquiring network address". ...
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110 views

how to connect linux to win 7 that tether from my Android?

not sure if it's an Android question but ... I connect my win7 to the Inet via USB tethering. I wonder if and how I can connect my linux box to the net. It can be done only via ethernet.
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9 views

Want to analyse the DHCP client code

I want to implement the DHCP client as a part of my project in C. But for this i want to understand the code. Is there any source which gives the descriptions of all functions and headers that will be ...