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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How to make the same WiFi adapter work on two different networks with different DHCP configurations?

I have a tablet that is going to be used in two networks: One network has DHCP deactivated while the second one has it activated and uses a different range of IP adresses. The problem is that if I ...
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1answer
41 views

Can I /release and /renew DHCP of a router?

My current setup is as follows: There is a router the WAN goes into (R1). There is one more router (R2) connected to it and two switches. WAN | | R 1 | | ----- R 2 | | -...
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1answer
98 views

Assigning unique IP ranges for multiple USB Ethernet gadgets on a single host

I am currently developing an embedded device running Linux, that allows being connected to a Windows host using USB. To achieve this, I am successfully using the USB Ethernet gadget driver on this ...
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1answer
164 views

Changing network and DHCP Scope from /24 to /23 for new users

I have watchguard XTM VPN Firewall(use as internet gateway) with /24 and DHCP Server (192.168.1.2 to 1.250) at office. Nowadays we are facing problem like not enough ip address so i want to change to /...
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0answers
55 views

What is preventing Windows from obtaining new IP from DHCP?

I have Windows XP box, which is getting IP address from TFTPD32 application. So in tftpd32.ini I have specified static record: 08:00:27:CE:9B:AD=10.10.1.3 Now I would like to change that record so ...
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3answers
540 views

Windows 10 Limited wireless connectivity

I updated my lenovo E535 to Windows 10. I have following problem with the wireless connectivity. It seems that even if I connect to the AP the IP address is not assigned using DHCP. Even if I assign ...
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2answers
26 views

How to determine which DNS resolved a request

How can I verify that my client system is using the primary DNS vs. failing over to the secondary DNS? I've found lots of information about verifying the configuration that the clients receive, but ...
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1answer
63 views

How to Create new scope under super scope in windows using command?

AM trying to create new scope under my exissting superscope. like below +hostname ++IPV4 +++Superscopename ++++newscopes using below command netsh dhcp server add scope <new_scope> <subnet&...
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1answer
82 views

Sharing a proxied university LAN connection via a TP-LINK TP-WR740N router

I have access to university LAN that’s behind proxy and user-password authentication. They assign IP's via DHCP, so my IP changes all the time. Gateway, DHCP servers and DNS addresses remain constant. ...
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0answers
190 views

Android & iOS Devices over WLAN can't acquire DHCP IP Address

Here's our configuration : WiFi Access Point with DHCP turned off is connected to our main network. Our main network is serviced by a hardware DHCP (Kerio Control) DNS is serviced by two Windows ...
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1answer
329 views

Debian server making many DHCP queries per second

I have a webserver running on a local machine, which spontaneously started to send about 400 DHCP requests per second, constantly changing its IP address, until I killed dhclient several hours later. ...
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3answers
14k 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 ...
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1answer
102 views

VMNet DHCP Server does not assign my Ubuntu machine its own IP

I am trying to build a Virtual Network in Ubuntu with two virtual machines who only have the means to communicate with each other independent of the host. On both machines I went to Settings->...
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vote
1answer
3k views

After cascading two routers, can't connect to the second anymore

I have two routers. The "first" one is a TP-Link TL-WDR3600 and is directly connected to a cable modem which my ISP gave me. DHCP is enabled here. The "second" one is Linksys WRT320N. This one is ...
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2answers
80 views

Getting dynamic IP although specified a static one

I have a Linux machine on raspberry that function as an access point. Linux raspberrypi 3.18.7-v7+ #755 SMP PREEMPT Thu Feb 12 17:20:48 GMT 2015 armv7l GNU/Linux And I have a DHCP server on it. in ...
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1answer
745 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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1answer
3k views

Windows 10 preview PC getting served static and DHCP address

Setup PC: Latest Windows Tech Preview IP address set to static. Router: R7000/DDWRT Lately I've notice, when checking devices that are connected to my router, that this PC has been showing the ...
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0answers
42 views

iptables config to restrict dhcp trafic

eth0 is connected to internet, and eth1 is connected to clients, giving dhcp addresses. However, I've got some clients getting IP addresses via eth0. Is there a way to put a line on iptables dropping ...
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0answers
120 views

dnsmasq does not start upon system boot

I am using a RasPi with Kali Linux installed on it. Problem is, that dnsmasq does not seem to start at all during boot. confirmation for that was found here: root@kali:/etc/init.d# update-rc.d ...
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1answer
200 views

Can't see DHCP Discover packet when capturing DHCP traffic

I am getting DHCP Offer as the first packet on a DHCP traffic capture. Why does this happen? Can it be a normal behavior?
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votes
4answers
10k 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 ...
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0answers
64 views

Why would powerline adaptors work for direct connection but not access point

This is similar to this superuser question and I think pretty much identical to this question neither of which led to satisfactory answers. Basically I want to add a wireless access point to my ...
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0answers
316 views

Verizon/ActionTec router and “MAC Address already exists in Wireless Broadband Router's database”

I'm trying to add a DHCP reservation for an old Apple G5. Some others want to use it for testing software on PowerPC, and this seems like the easiest way to ensure port forwarding does not break over ...
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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 ...
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0answers
38 views

How to find DHCP server while configured with the static IP

I'm doing a lot of the weird remote management, due to the specific network configuration, I often need to switch a client from static to the dynamic address. In couple cases the third party DHCP ...
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1answer
43 views

DNS with two DHCP services

From what I know DNS is a service that translates domain names into IP addresses. I have noticed something on some small networks in small companies when they used routers as a switches. modem---...
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0answers
231 views

Can not connect to the internet from fresh install windows 10

So I reformatted a existing computer (Which was on win7) with Win10. I can not for the life of me connect to the internet though. I have tried the following: /release /renew Tried setting my ipv4 ...
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0answers
133 views

2 APs over Powerline Network within same IP subnet cannot see eachother?

I am having issues setting up my home network using powerline adapters. My Setup I have a Gateway, a Router, 3 Powerline ethernet adapters, and a Powerline Wifi Unit (TP-Link TLWPA4220). All of the ...
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1answer
127 views

Determine if it's a static IP or a DHCP IP

I'm trying to find a genric solution across all linux distro to find if the IP address attached to the system is a static or a DHCP ? On ubuntu , I can find if it's static or DHCP by doing a DHCP ...
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votes
2answers
399 views

After assigning public IP address using DHCP, whatsmyip shows expected 193.x.x.x but ifconfig shows 169.254.x.x link-local address

The computer in question has a Linux SO and is connected to a local network that has DHCP service active. I configured a public ip address to be given to that computer by the DHCP and I can ssh into ...
0
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1answer
294 views

Technicolor TC8305C DOCSIS gateway not providing DHCP or reliable connectivity to Apple iOS devices

I'm a Network Administrator, but I'm not sure how to proceed. I have a Technicolor TC8305C DOCSIS gateway, the Comcast brand. Every few months, I find some Apple devices will not properly negotiate ...
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1answer
22 views

What sort of information can I discover about my DHCP server?

I want to probe my DHCP server to see what sort of information is publicly available. Is there a way to see things like, which pools my DHCP server services, lease expiration times, etc.? I'm on a mac....
48
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6answers
7k views

Why is a router needed?

I‘ve been trying to figure out why a router is needed. I know a router can be used for DHCP and some other things, but I’m just thinking of networking with static IPs. So the following: Is it ...
0
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1answer
182 views

RT5572 can authenticate using WPA2, but can't get an IP address from DHCP

I have a system running open embedded Linux with the Ralink RT5572 wireless usb card. I have the driver installed along with wpa_supplicant and I need to be able to connect to a WPA2 secured network. ...
2
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0answers
206 views

OpenVPN client fails to activate pushed DHCP options for DNS and DOMAIN

OpenVPN client is connecting to OpenVPN server OK. During connection, we see the options pushed contain dhcp-option of DNS 10.0.0.2 and DOMAIN prd1.o2: Sun Aug 2 17:31:06 2015 PUSH: Received ...
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1answer
229 views

Connecting to two Networks with different DHCP servers

Ok, So at home I have two wired Networks (one with internet access and one that doesn't) I have Multiple Network adapters on my PC and I want to use one into one network and another to the other ...
0
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1answer
93 views

Internet drops - two routers handing out IP addresses?

My apartment block of 14 apartments share one fiber-optic internect connection. However, I've been having trouble setting up my wifi. I have two routers. 1) A D-link. This works out of the box, but ...
0
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1answer
112 views

internal static IP address configuration from router

How do I reserve an IP address for tleilax and ensure that tleilax only gets that reserved address? The tleilax box uses DHCP. When I look at attached devices, I see: Attached Devices Wired ...
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2answers
2k views

How to see what DHCP client does?

Does the dhcp client on Linux write any logs? If not, can logs be enabled and how? If it writes logs, where can they be found? How does a typical log of a dhcp client look like when obtaining IP ...
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0answers
127 views

What is the correct syntax for the dhclient.conf supersede statement?

I am using the Internet Systems Consortium DHCP Client 4.2.4. I want to use the supersede statement to override two DNS servers from DHCP. The corresponding man page section reads: The supersede ...
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1answer
484 views

How to configure DNS servers manually on Ubuntu server via bash?

I still want to use DHCP to obtain IP4 and IP6 addresses. DHCP delivers DNS servers I want that the DNS servers from DHCP are ignored and two servers I specify manually are used instead. Must be done ...
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2answers
7k views

DHCP failure when rebooting RPI 2

When we start up my Raspberry pi 2, we get the following error: When the RPI is rebooted, we are getting an IP and we are able to surf on the internet, so we don't know what the error exactly means....
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vote
1answer
148 views

Server 2012 DHCP Policies

I'm studying DHCP and Windows Server. I have a virtual SOHO inside VMware, running the following config: SRV1 (Server 2012): 192.168.10.10 (Addr Reservation DHCP) DHCP Pool: 192.168.10.1 - 192.168.10....
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votes
2answers
2k views

In OS X, how can I prepend 127.0.0.1 to the list of DNS servers obtained through DHCP?

I am trying to use dnsmasq to resolve certain known domains using its configuration, but let the rest of the requests go through to the normal DNS server assigned by DHCP. I cannot get this to work. ...
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0answers
463 views

Beaglebone DHCP Server Assigns its Own IP Address

I'm trying to run a DHCP server on my Beaglebone Black (running Debian), and I want to give it a static IP address - 192.168.17.1 - but it keeps assigning itself its own different IP address - 192.168....
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0answers
77 views

dd-wrt subnet from network with in a network

I am testing some network configurations. I am trying to create a network within a network for TESTING PURPOSES ONLY. Basically the gateway for ARouter(made up name for main router) is 192.168.0.1(for ...
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1answer
71 views

OS X only picks up 1 of 3 DNS servers from DHCP on DD-WRT

I am running a DD-WRT router, and in the "Network Address Server Settings (DHCP)" section on the "Basic Setup" page, I have entered values for "Static DNS 1", "Static DNS 2", and "Static DNS 3". On ...
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0answers
93 views

dnsmasq pass a url using dhcp option 43

I have been reading the documentation of dnsmasq and different examples found on internet but I have been unable to succeed. I am trying to pass a URL to the CPE using dhcp option 43. The CPE is ...
0
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1answer
257 views

looking for a utility to test DHCP settings

Iv'e recently installed DHCP server (isc-dhcp-server) in my workplace. I'm looking for a utility to test the network DHCP settings from a remote machine (not by using dhclient / iptables /renew). ...
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1answer
290 views

DNS Resolution Errors on New Active Directory (Server 2012 R2)

In advance I thank you for any help or advice you can provide as I am fairly new to the concepts and config of Active Directory and related roles like DNS, DHCP etc. I have recently set up a domain ...