Dynamic Host Configuration Protocol (DHCP) allows computers on the same network to automatically obtain a unique IP address.

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How to skip pushing the default gateway via DHCP in OpenWRT?

I have a router with OpenWRT that I want to resolve IP addressing with DHCP without setting a default gateway. I have added a DHCP-Option parameter with value 3,0.0.0.0 that is supposed to set the ...
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Network interface/dhcp problems ubuntu with kvm and network bridge

I have a ubuntu system running 12.10 I am using KVM and have configured a bridge for the virtual machines, which is using nat forwarding. I am having problems with the connection dropping out ...
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3answers
2k 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 ...
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3answers
467 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 ...
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58 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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261 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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2answers
604 views

Laptop kicks other users off the wifi when it connects, then gets disconnected itself

I've got an Acer Aspire One running Linux. When I connect to my building's wifi, everything seems fine for a short period of time (I can google a few things or start downloading an Apt package), but ...
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81 views

Joining client to Server in VirtualBox

Having installed the trial of Server 2012 and a copy of Win 7 Pro in VirtualBox, I now need to join them together so the client can be in the domain of the server. I need to deactivate dhcp within ...
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650 views

Can a DHCP router with MAC address whitelist be hacked with a VM?

I locked down my whole network’s MAC addresses so that only CPU’s on the whitelist can get an IP from the AirPort Extreme DHCP server and router. Well, guess what. A Mavericks VM with a completely ...
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193 views

How to find the IP address of a router

I live in a dorm where many students have setup small wireless networks. There are two of this networks that are very close to my room as the signal is very strong. Our college uses DHCP to assign IP ...
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2answers
176 views

DHCP Renew on FW restores Internet Connection - why?

Home network, Cisco ASA 5505 9.0(1), Windows Server 2008 R2 (actually SBS 2011), various Mac, Windows and embedded clients. ISP is Rochester, NY Road Runner. Often (2-3x per day) my embedded devices ...
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374 views

2 DHCP servers on the same network

Riddle me this: A BT Quantum Phone system has a built in web server for administration and configuration. However it also contains a DHCP server that cannot be turned off and a static IP address that ...
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787 views

Testing dhcp server locally on one physical machine with virtual machine

I'm writing simple program to configure and monitor DHCP server on my Ubuntu 12.04. What I'm trying to achieve that my physical machine will be DHCP server and my VM (virtual machine) get one lease ...
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2answers
123 views

Internet connection issue

For some reason this laptop doesn't want to stay connected to the Internet. I have to restart the DHCP client service every time to fix the connection problem. I didn't have to usually do this. I'm ...
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2answers
215 views

Linux NetworkManager not writing resolv.conf or running dhclient

I'm on a ubuntu based linux distro (linaro) running xfce. My networkmanager connects to wireless access points, but is unable to do two things: dynamically acquire a nameserver, and write a dynamic ...
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44 views

How to detect the presence of network devices without assigning an IP address

I want to be able to detect if a certain device with a given MAC address is on the network, without requiring that the testing device's interface has an IP address at all. One way I could do it is by ...
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65 views

How to configure Windows 7 to disable all network interfaces before hibernation and enable them on waking up?

Whenever I hibernate my laptop at home, go to the office an wake it up there I get an IP address conflict warning. IP is configured by DHCP (without any MAC binding) at both places so I think it would ...
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87 views

How should I set up network using 2 routers so both see networked computers / printers

I have a Cisco DPC3825 DOCSIS 3.0 Gateway modem from my ISP that has 4 lan ports, and I have a second router Linksys WRT54GS (running DDWRT) that has a WAN port and 4 LAN ports + Wireless. This is the ...
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How can I ensure that my static ip address is read from /etc/network/interfaces rather than dhcp?

This is a follow up to the following question. I'm trying to set a static IP by changing /etc/network/interfaces to the following: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo ...
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285 views

Bridge two router

I have two router, i want to extend my wifi i have an tp-link AC1750 Router who are directly connected to my cable modem (192.168.11.1) it's ssid is: main_router, dhcp is enabled i have an tp-link ...
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Disconnect other users from DHCP client list

When I log in to my modem webpage I can see lot of employees are connected to WiFi network. This is okay. I have full access to the system and i want to disconnect the particular employee from the ...
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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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How can I fix this conflict between my wired and wireless network connections?

I have two working network connections: One connection is for a wired ethernet card adapter and the other is for a wireless usb adapter. Both connections work fine when used separately, but when ...
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456 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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140 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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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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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 ...
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1answer
494 views

How safe is the IP address configured through DHCP?

I'm using internet through USB Dongle having GSM based 3G connection, it is using DHCP to configure IP address, I'm having a small HTML page in my computer that uses Google Maps and Browser's ...
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1answer
246 views

Multiple dhcp servers on separate lans connected to same modem - is it possible?

I have 2 clients who share a cable connection that has a modem/router on it. I call this one lan 0, which has dhcp disabled. There are two Cisco/Linksys routers attached to lan0, named Lan1 and Lan 2, ...
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1answer
1k 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 ...
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Windows Server 2003 DHCP

I have a scenario where user had ip's 192.168.1.100 to 192.168.1.160 previously it was 192.168.1.10 to 192.168.1.254 The problem is that the ip of the users on 192.168.1.19 and 192.168.1.42 is not ...