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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Mikrotik RB 951 unable to ping LAN and Internet

My Mikrotik RB951 has the ether1 interface configured as a DHCP client and connected to the LAN DHCP server. It gets served IP address automatically but is unable to ping other devices in the LAN and ...
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0answers
56 views

Computers on the network randomly try to contact ISP DHCP not router DHCP

I've been fighting with this issue for a few weeks, but one of my clients has Cox Communications as an ISP, with their standard modem, and a Netgear Nighthawk x6 router. Originally the client had ...
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2answers
111 views

Logging into a windows 7 system which is under domain when IP block change

I'm having a very interesting trouble. I've a PC under a domain. But I can't login even though I know current credentials the account. The PC was manually set to an IP and our SA changed our IP ...
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1answer
234 views

Associate MAC Address with IP Address?

I would like to forward some ports on my router to specific devices on my home network. To do this, I would like the desktop computers at my home to have fixed IP addresses on my local network. Other ...
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1answer
109 views

Allocate an IPv6 address to my MAC address

I like to run a game server periodically, and to help ensure that the address is predictable for other players, I have created a DNS (A) entry to map a well-known DNS name to my public IPv4 address, ...
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81 views

Both Public and Private DNS not working. How make it work properly without any conflict

I setup private network so I installed DHCP in one of my server. Now my public network DNS is not working. How can I setup DNS for private network with conflict the public network DNS? DHCP Setup. ...
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2answers
147 views

Why can't I connect an Access Point to this Network?

A client hired me to install an Access Point to make his home network available via WiFi. The modem/router is a Motorola with the following specs (the list is based on observation as I don't have ...
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2answers
160 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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1answer
473 views

Locate Host Name on LAN with DNSMasq

I am running DNSMasq as both my DHCP and DNS server on my DD-WRT router. I had thought that DNSMasq was adding hosts that it registered in DHCP to the DNS server automatically, but I have a few ...
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2answers
690 views

DHCP not issuing out IP addresses

DHCP on my network is no longer issuing out IP addresses. Every new device must be manually configured to connect to the network. After executing show ip dhcp binding, i noticed that all the ip ...
2
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3answers
82 views

IP Address conflict in a LAN

How to find if someone has taken a particular IP address in a Local Area Network? Or in a more generalized form, how to find the list of IP address that DHCP has allocated in a Local Area Network?
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1answer
524 views

Win 7/8/8.1 create wireless open/WEP network - any possibilities?

I have a very old (2003) equipment that has Aironet/Cisco 350 network adapter on board (no WPA/WPA2, only open/WEP authentication). I need to connect it with PC (Win 7/8/8.1) without external access ...
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4answers
3k views

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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1answer
156 views

how to use isc-dhcp-server in place of router dhcp

i have a virtual Debian installed on my VMware running on win 7 64 bit , i am using a bridged connection for my virtual machine , i installed isc-dhcp-server and changed the /etc/dhcp/dhcpd.config ...
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1answer
109 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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0answers
326 views

IPv6: Cannot reach outside of LAN (OpenWrt Router connected to ISP Router through Wi-Fi)

Hello dear server expert, I would like to ask for you help for my installation. I have a Freebox Revolution (I am French and my ISP is Free). The box provides IPv4 and IPv6. Every computer connected ...
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2answers
620 views

192.168.1.254 vs 255 DHCP IP assignment

I belive that with a 255.255.255.0 subnet you get 255 ip addresses. Whats the difference between DHCP servers that use "192.168.1.1 to 192.168.1.254" and "192.168.1.1 to 192.168.1.255"? Are both of ...
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1answer
87 views

FreeBSD default router

I have two network interfaces in a FreeBSD box, both configured with DHCP; each is assigned an IP and gateway. FreeBSD is using the wrong interface for outbound traffic. How can I override the default ...
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0answers
70 views

Can I seed what DHCP options are offered on my network connection WITHOUT server access

When you get a DHCP address from a DHCP server it comes with options. I want to see all of the options set. Yes, I know that I could bug one of our extremely busy sysadmins and get them listed off to ...
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1answer
41 views

Restarting BIND service getting error

When I restart the BIND service getting this error from syslog named[4960]: /etc/bind/named.conf:15: couldn't add command channel 127.0.0.1#953: address in use Even when I execute nslookup 10.5.5....
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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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1answer
479 views

Problems Configuring Netgear Prosafe 7224v4 Switch

Our office has a Netgear Prosafe 7224v2 Switch which was installed a number of years ago. Currently the switch is not configured to act as a DHCP server thus we need to manually assign all our ...
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2answers
65 views

Do my other local computers need a static IP when I use port forwarding?

If I change my main computer to static and port forward to get a server hosted, does that mean that I need to change the rest of the laptops and computer on the network to static to get them to ...
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4answers
1k views

How to reach my router's configuration page?

I've set up a router in my room (It's a TP-LINK W8980). I'm inside a college room, so I connected the WAN to the ethernet ports of my room, and the router is creating a wifi network. It's using PPPoE ...
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0answers
200 views

How to bridge two interfaces both on different networks with different IP addresses in OpenWRT?

My embedded Linux device—running OpenWRT—has two interfaces that are ath0 and ath1. ath0 is a WLAN port also runs a DHCP server. ath1 is used for Internet connection. Now, I have to setup these ...
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2answers
104 views

Connect one router to another one >> ip conflict

I have 2 routers, the first one is connected to 2 switches 24 ports each one, and is there because it is vpn connected. The second one connects to one of these ports and is the wifi one. My problem is ...
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1answer
180 views

Win Server 2008 DHCP on Virtual Network

I'm new to network stuff. I have 2 virtual computers running in VirtualBox: 1 on Win XP and 1 on Win Server 2008. I'm trying to create a DHCP server and DNS server on my server. I know how to add ...
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3answers
3k 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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0answers
105 views

Linux IP aliasing with single DHCP and single STATIC IP address

I'm working on an embedded system with a single physical ethernet device. Using aliasing, I'd like the device configured such that one static IP address (call it s.s.s.s) is ALWAYS available. The ...
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1answer
3k views

Removing DHCP and DNS from Windows AD Domain

This is my first time posting here, so please bear with me. I have been searching for this answer for a few days now with no luck. Maybe my google-fu is not strong enough. I am a software engineer ...
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3answers
90 views

How to get an unused (on another host) IP range

I'm working on an embedded system that will feature a ethernet connection to a PC host. The product contains a DHCP server so the PC can automatically get an IP assigned. In order to not interfere ...
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1answer
69 views

Why unconnected network card periodically sends DHCP requests?

I have a PC with windows 7 OS. The PC has two network cards, one built-in 100Mbit, one PCI-E 1Gbit. The 1Gbit interface is connected to a linux-based router with DHCP server. The server provides valid ...
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3answers
426 views

What to consider when putting a router inside of another network, not controlled by me?

this question is a question from an users point of view, and a noob regarding network technology. I am living in an appartement block, where the internet is routed central (lets call it that way). ...
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1answer
150 views

DHCP List not empty after disconnection

I have a wimax modem connected to a router, a TP LINK router, the weird problem I am having is that it keeps dropping wifi, and I cannot reconnect to the wifi again. I connected the router by wire, to ...
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3answers
2k views

Why does my router stop giving out IP addresses

I've got a Cisco Linksys X3500 ADSL2+ router which we have been using fine for a long while, until all of a sudden, the router stopped providing IP addresses after a certain amount of clients were ...
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2answers
298 views

How to ignore DNS servers coming from DHCP

I use one of those dns services that let you bypass region restrictions on Netflix and similar sites. However I noticed that recently it stopped working, even though I set up the service's dns ...
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0answers
93 views

DHCP server in separate broadcast domain and option 82

Recently studies of DHCP servers raise some questions, which I cannot find the answers to using Google. Many documentations state: "If there is only one subnet declaration, and no network interfaces ...
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1answer
105 views

Ignore DNS servers from DHCP lease

I've an Ubuntu box. When I connect to a wifi network, I get the IP address for wlan interface using dhclient. The problem is, I don't to use the DNS servers provided by the DHCP lease. How can I do ...
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1answer
834 views

DD-WRT sends itself as the DNS server to DHC clients

I'm using DD-WRT on my router (version DD-WRT v24-sp2 (12/11/14) mega). WAN is configured to have static IP and LAN is configured to have a DHCP server provide addresses/DNS, etc to clients. All of ...
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1answer
3k views

Change DHCP IP Pool Starting Address

How can I change DHCP IP Pool Starting Address from 192.168.1.xxx to 192.168.10.xxx?
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1answer
1k views

Two routers, same network, different SSID and password

I have a question about router configuration that I haven't really found an answer to. What I have: SSID: House A: A ZyXEL DSL-modem (660 Prestige) with built-in WLAN and DHCP-Server. IP: 192.168.1....
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1answer
273 views

Tomato firmware with separate DCHP server

I've got a Tomato router which works wonderfully, but I've also got a Windows server that I would like to use as the DHCP server instead of the Tomato router. I know that I can configure each client ...
3
votes
2answers
441 views

Specific ip settings for different wifi access points

I have a situation where I want to connect a tablet to two different networks, not simultaneously but switching from one to the other (and at different locations). The tablet is running on Windows 8.1....
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0answers
122 views

ddclient updating to public IP instead of private IP

This is the antithesis to question 389125 I have private services (apache, ssh, synergys for example) accessible on a desktop on the local network. This is not with centralised login (ldap/AD for ...
0
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1answer
76 views

How does client know which wifi router to use?

I have two questions regarding my home network. It is currently set up as follows: Cable broadband -> NetGear CG3000v2 Modem (ssid:WIFI0) -> eth -> TP-Link WDR3600 (ssid:WIFI1) -> Netgear Router2 (...
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1answer
84 views

How can the DHCP routers option work if it's my own IP address?

I'm setting up a T-Mobile USB 4G data modem on Ubuntu 14.04 and I'm not making sense of the DHCP lease that T-Mobile gives me. Specifically, the value of the "option routers" is identical to the ...
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0answers
925 views

How to set up Networking and DHCP in windows server 2012 inside VirtualBox?

Background: Three operating systems are installed inside VirtualBox: Windows Server 2012 R2 Windows 8 Pro Windows 8 Enterprise So, I want to set up the Server 2012 R2 as Domain Controller, DHCP, ...
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1answer
1k views

Network Config (Alcatel GPON (I-241W-S) & TPLink TL WR1043ND)

I have a fibre to home internet solution configured at my place, the Alcatel GPON receives the fibre cable and a LAN cable is fed from it to the TP Link router where the ppoe connection is etablished ...
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0answers
22 views

dhcpd3 not reusing IP for mac

I have an ip range with two ip-addresses defined as follows in my dhcpd.conf: subnet 192.168.1.0 netmask 255.255.255.128 { range 192.168.1.10 192.168.1.11; default-lease-time 600; ...
0
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1answer
179 views

Can I make my Router (DD-WRT) act as DHCP server for an unmanaged switch that is not connected to it?

+-------------+ +----------------------+ | | | | +------------+ | Cable Modem +----------+-----...