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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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
1k 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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1answer
771 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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316 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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1answer
11k 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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1answer
494 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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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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895 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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2answers
118 views

how to know what computers are connected to an AP?

The access point doesn't have DHCP enabled, so I can't look the DHCP table. Is there a way to ping an IP and know what AP is using? Edit: I know what IPs are on the network using nmap, but when I ...
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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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1answer
585 views

OS X Server keeps DHCP DISCOVER even with no client in the net. how to stop?

I have trouble with DHCP release, this server keeps NETBOOT or DHCP DISCOVER even if the specified device was logged out, and its wlan modul is tourned off. Wich leads me to - that the server is ...
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1answer
236 views

how to setup linux-igd to use webserver on same machine

So I have a web server on port 80 and linux-igd/upnp running on the same machine using dhcp. I want to configure linux-igd to be a way to get to the webserver. I found this tag in the linux-igd xml ...
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1answer
678 views

Router “ghost” connections

My Linksys WRT54GS2 V1 has begun to display ghost wired connections in the last weeks. As you can see from the images I have nothing connected except for the power cable. I have tried a hard reset ...
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153 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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1answer
250 views

How can I connect a wireless access point to an existing network (with a proxy)?

im new here, hope you guys can help me out. i was tasked to do the network (wireless and wired) of our new department in our company. our existing network has dhcp server(Windows Server 2003) and a ...
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2answers
739 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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1answer
1k views

CentOS DHCP server failover won't give out leases

I have followed this tutorial: http://www.madboa.com/geek/dhcp-failover/ However, I can not seem to get a lease at my windows client. I have set both servers (CentOS 6.2) in virtual machines, ...
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1answer
734 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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1answer
74 views

DNS Server for my home netwoek

I have a number of virtual machines all running on my ESXi host. These all connect to my home router, and are assigned an IP address through DHCP. When I go to connect to these VMs, they frequently ...
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2answers
202 views

Persistent DHCP Reservation Timing Out

I have 2 machine inside my home LAN (Netgear WNR2000v2 wifi). One of them is a laptop ("client machine") that will always be assigned random IPs in the 192.168.1.1 through 192.168.1.50 range. The ...
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1answer
832 views

Virtual Box Router - Windows Host, Linux Guest

I currently have Ubuntu Server running as the Guest OS in Virtual Box on a Windows 7 Host. The Ubuntu Server gets its IP from DHCP and is Bridged to the my Network Adapter. I've disabled Internet ...
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3answers
61 views

DHCP Reservation (MAC)

I've been having problems with a few statements I've been reading. When setting up DHCP Reservation based on MAC addresses... Do the reserved IP's need to be in one of the scopes or not? Judging from ...
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66 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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435 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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1answer
558 views

How to setup DHCP only on the wireless side of a router or AP?

We are currently running a simple network with unmanaged switches. We already have a Internet feed with router and DHCP. Im looking to add in another separate internet feed, with a 2nd router (NO ...
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2answers
258 views

Network with 2 TP-Link router

I have two TP-Link router to build a home network with, both Wireless (WR841N and WR642G). I connected the WAN to the WR841, there is 2 desktop PC connected to it, works fine. I tried to add the ...
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1answer
195 views

Windows 7 ad-hoc internet sharing - How to share with static IPs?

I'm trying to share internet via ad-hoc connecting two Windows 7 computers. The ad-hoc network only works with static IPs, but when I try to share the internet, Windows pops a message saying that the ...
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340 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
479 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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1answer
957 views

IP conflict when connecting DHCP enabled PC to DHCP enabled laptop with its wireless and wired network connections bridged under Windows

I have a laptop running Windows XP SP3 with a wireless NIC and a wired NIC. I bridge the two network connections under Windows\Control Panel\Network Connections. This gives me a single bridged network ...
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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 ...
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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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3answers
463 views

Router behind switch in my home office will not pull up a dynamic IP from my service provider

I have the following setup in my home office: Fiber-optic service from my service provider passes through the service provider's ONT in the basement and into my apartment via an Ethernet cable ...
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327 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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1answer
2k views

Vyatta DHCP relay is not relaying replies correctly in bridge

I have DHCP server (dnsmasq) on LAN network that has IP 192.168.255.2/16. Now I've created bridge on Vyatta that combines LAN and WLAN networks. Both NICs are on promiscuous mode in ESXi. If I put ...
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1answer
809 views

Not receiving responses sent from a different subnet when my machine is on DHCP

I am building a utility to communicate with some hardware that comes with a default IP address of 10.0.0.1 and subnet mask 255.255.255.0. The hardware replies to UDP messages on the same IP and port ...
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1answer
1k views

PCs on domain can not resolve external IP addresses using the DC's DNS Server

I currently have a domain controller which handles all DHCP and DNS. The DHCP works just fine and the domain controller itself can use the internet with no issues. However, PCs that are part of the ...
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239 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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1answer
55 views

DHCP/routing oddness

I have a Squid proxy server on my network that is connected to the DHCPd server (commodity router) through a commodity switch. If there is a break in the connection (eg router needs to be rebooted) I ...
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1answer
3k views

dhcpd not processing broadcast DHCPDISCOVER

My DHCP server is handling two subnets. The first subnet is all host -> fixed-address sets for known hardware. The second subnet has a pool set up to handle virtual machines in a vCenter. Now, if I'...
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1answer
83 views

setting up a WGR614v7 behind a linux box

Here's the setup, I have an openSUSE box with 2 NICs, one goes to my home network router, the other has DHCP running and it attached to a wireless router. I'm trying to get this setup to work before ...
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0answers
106 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 ...
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1answer
381 views

Wireless Bridge -DHCP

I was thinking of picking up a couple of TP-Link wireless routers, and setting them to bridge. I have a sep. LAN network that would have one of them, and I'd put one on my internet connection. ...
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1answer
537 views

domain network with DHCP + NAT

I'm configuring a virtual network on an esx server. I have a Windows Server 2008 R2 configured with these roles: - active directory domain services - DHCP server - DNS Server - Network Policy and ...
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2answers
150 views

Enabling access to a home server from “Internet” side

I wish to enable remote access to my linux home server, so I can use it when I'm not home. I tried doing so using port forwarding as follows: http://<RouterInternetIP>:<SomePort> => ...
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1answer
746 views

USB Ethernet Adapter Link Local - DHCP Assignment for Link-Local Not Working

I have a rather interesting problem with a Belcarra USBLAN ethernet adapter. According to the manufacturer's tools my host adapter is getting an IP address. According to Windows, however, it is not. ...
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1answer
459 views

IP address changes frequently & Computer is not available via hostname

I have a cable modem from my ISP to which I can only connect wirelessly. Currently I have a desktop PC(windows 7 x64) a dell laptop(windows 7 x64) an iPod(iOS 3.1.3) and a linksys wrt54g router (v8 ...
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2answers
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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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 ...