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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1answer
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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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0answers
10 views

Ethernet link going up/down repeatedly. DHCP

I have a very strange issue. This one is similar to this one. My router is TL-WR841N. The very strange thing is that if I insert Ethernet cable directly into my pc, then I can use internet without ...
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0answers
25 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
17 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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0answers
12 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
37 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. ...
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0answers
61 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
19 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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0answers
17 views

Why is my DHCP pool not working? [migrated]

I'm trying to create a configuration and it's doing most of what I want it to do, but the DHCP pool isn't assigning addresses. Here's the config so far: enable config t hostname xxxxxx enable ...
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1answer
33 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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2answers
247 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 ...
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0answers
23 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 ...
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0answers
99 views

Network Discovery issues Windows 10. Net view Error 53, how do i resolve this?

We have a simple 2012 Domain controller which is a brand new DC.I am upgrading our workstations to Windows 10 and have the following problem. Now when i click on network to see all other machines on ...
0
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1answer
34 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
34 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
20 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 ...
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0answers
36 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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6answers
5k 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
56 views

Bridged Network not working on Ubuntu Guest, Windows 8 Host using VMWare

I'm using VMWare Workstation 11 (Ubuntu 15.04 Guest, Windows 8.1 Host) and bridged networking is operating fine on my home network; however, when I try using the same configuration on my work network ...
0
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1answer
20 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
60 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. ...
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1answer
26 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 ...
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0answers
24 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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2answers
57 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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1answer
61 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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0answers
56 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 - ...
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1answer
39 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 - ...
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0answers
25 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
34 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
28 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
49 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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2answers
40 views

Router without DHCP set and has external IP from local perspective

I have a network like: x.x.0.1 - ISP's AP, then mikrotik router x.x.0.5 -> set up by specialist and another router x.x.0.7 -> for my learning purposes. My problem is, that I really don't understand ...
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1answer
76 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 ...
0
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1answer
28 views

Printer wasn't working. Gave it a Static IP and now it works! But why?

I was toying with my printer to get it to work. Originally, the printer was automatically given an IP of (169.254.248.206) However... I read that manually setting the printer's IP outside my ...
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0answers
35 views

Debian 8: Server makes routers dhcp crash

I've got an old pc with debian 8 running as home server. A small problem is that whenever the server uses a lot of network traffic, let's say while downloading torrents, it seems to crash the dhcp of ...
2
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1answer
109 views

DHCP Reservations, SERVER 2003, easy way to Export txt\csv\xml

I have a list of DHCP reservations, Server 2003. I want to export (in all it is) a list of IP, MAC address. I need the list for view: sorting\store in of DB for later Query, not for importing later. ...
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2answers
66 views

Why does a device show up twice on my dhcp table? [duplicate]

I bought a new router yesterday, but I dont think that's relevant because on my previous router it happened too. The only change is that my first router wasn't dualband and this new one is. So that ...
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0answers
45 views

Linksys EA6500 and Android DHCP

Situation: I have a Linksys EA6500 v2 Wireless-N router. About 2 months ago, I had to perform a factory reset because my ISP refused to accept that my router wasn't the issue with my Internet access. ...
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0answers
19 views

I cannot capture DHCPv6 packets on GNS3 using Wireshark

I have got a router set up as a DHCPv6 server connected to a host that gets an IPv4 & IPv6 addresses from it, however I am not able to capture any DHCPv6 packets at any point of the connection. ...
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0answers
31 views

Ubuntu server as DHCP server for dual stack

I currently have an Ubuntu server on VirtualBox set up to give hosts on my GNS3 topology IPv4 addresses, and it is working without issues. However, I would like to have that same DHCP server give out ...
1
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1answer
36 views

What's the use of search domains? [closed]

Something you often see as a configurable option for DHCP are the DNS servers and the search domain. Alright, DNS servers have an actual use, but I'm not so sure about search domains. It took me quite ...
0
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2answers
41 views

DHCP server used reserved IP

I am using DHCP server on centOS 6.5, I reserved an IP for specific MAC address my config file /etc/dhcp/dhcpd.conf option domain-name-servers 192.168.1.5, 8.8.8.8; ...
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0answers
13 views

Making multiple DHCP IP permanent in Ubuntu 12.04.5

I followed the instructions here Getting 2 IP addresses on one network card, using DHCP and this worked for me but how do I make it permanent in Ubuntu 12.04? Should I put it in some sort of cron job ...
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0answers
37 views

Win7 load balancing over 2 default gateways and 1 interface

This is a scenario I've been working on lately: My PC has 1 NIC connected to a 192.168.100.0/24 network. This network has 2 gateways to the Internet, namely .1 and .254. Now I want to get to the ...
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1answer
39 views

Set DHCP with manual IP

Any idea how can we set a DHCP with manual IP address from the terminal OSX (for a wifi interface)? I know that this set a manual IP but not sure how to keep the DHCP: sudo ipconfig set en1 INFORM ...
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0answers
115 views

Dual boot Linux Fedora 22 internet not working

I recently installed Fedora x64 on another partition alongside with windows. I went over the install process many times before I got it installed and sometimes the internet would connect, but I'd see ...
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2answers
132 views

Why does DHCP uses UDP port 67 and 68 for the communication between the client and server?

I know that the DHCP is used to assign an IP address to the client and hence the only possible way to establish the connection is to listen on a specific port. But is there any specific reason behind ...
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0answers
15 views

Output of the Show ipv6 dhcp interface

I successfully configured the DHCPv6 server. My CPE is also receiving the prefixes. However, I am not to figure out some of the terms(which are in BOLD) in the output of the command "show ipv6 dhcp ...
0
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1answer
64 views

Configure localhost to use DHCP IP address

I have a local server Wildfly and I have a test application which I can access: http://localhost:8080 works. Now, I have comcast Xfinity with a modem (no additional router). I am working on CentOS ...
0
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2answers
715 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 ...