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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Change subnet on TP-LINK TD-W8961ND

I don't seem to be able to change the subnet on my router (spoiler alert - I'm not terribly good with networks so I would appreciate the help!). When I change the main IP address to 192.168.10.1 and ...
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4answers
4k views

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
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 ...
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3answers
467 views

Windows remembers old DNS suffix

I just changed the DNS domain of my local network from home.local to mydomain.local, after purchasing mydomain.com. I made all the necessary changes in my BIND and DHCP server, and linux clients on ...
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3answers
59 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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3answers
333 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
195 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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2answers
416 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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2answers
938 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
124 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
49 views

static IP holds good even after changing network to dynamic

I'm using wpa_supplicant as a client to connect to an AP. When i'm trying to change the wireless connection from STATIC to DHCP(dhclient is invoked using the below command with leases ...
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2answers
44 views

Why did setting a static IP fix my LAN connection issue?

My router is working perfectly, and all other computers use automatic DHCP to get an IP address (all hard wired--no wireless). This one laptop lan connection kept getting stuck "identifying" the ...
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2answers
89 views

Windows not using manually set IP Address

Recently my windows machine that has been working without a problem for over a year decided to start using a dynamic IP address instead of the static one I manually configured it to use. The only ...
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2answers
76 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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2answers
106 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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2answers
249 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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2answers
278 views

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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2answers
2k 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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2answers
95 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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2answers
513 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 ...
0
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2answers
161 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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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 ...