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  • Two DHCP servers on the same network

    - by CesarGon
    We are setting up a routing link between the Windows Server 2008 networks of two different buildings in my organisation. Each network uses a different IP addressing scheme (one uses public addresses, the other one uses private), but the goal is having a single Windows Server domain across the gap between the buildings. The link is provided by a 100-Mbps point-to-point line. I have always understood that you should not have more than one DHCP server on a network. However, we are planning to put a domain controller on each building, and each domain controller will be a DNS server and a DHCP server as well. The intention is that a machine booting up in building A gets its IP address from the DHCP server closer to it, in building A, while a machine booting up in building B gets an address from the DHCP server in building B. Since the two buildings will be linked and the network will be only one, will this work? How can I avoid that a machine booting up in building A gets an address from the DHCP server in building B (or vice versa)? Thanks.

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  • Two DHCP servers on the same network

    - by CesarGon
    We are setting up a routing link between the Windows Server 2008 networks of two different buildings in my organisation. Each network uses a different IP addressing scheme (one uses public addresses, the other one uses private), but the goal is having a single Windows Server domain across the gap between the buildings. The link is provided by a 100-Mbps point-to-point line. I have always understood that you should not have more than one DHCP server on a network. However, we are planning to put a domain controller on each building, and each domain controller will be a DNS server and a DHCP server as well. The intention is that a machine booting up in building A gets its IP address from the DHCP server closer to it, in building A, while a machine booting up in building B gets an address from the DHCP server in building B. Since the two buildings will be linked and the network will be only one, will this work? How can I avoid that a machine booting up in building A gets an address from the DHCP server in building B (or vice versa)? Thanks.

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  • Microsoft Windows DHCP: Steering IPv4 clients into specific scopes based on MAC

    - by Easter Sunshine
    We have visitors on our campus who bring their own laptops and devices and use our wireless and wired networks. When we receive a copyright infringement notice (typically BitTorrenting), we are required to quarantine that MAC address so that it no longer has Internet access. No matter what website it tries to visit, it is sent to a web page explaining to the user that the device has been quarantined. We have thus far implemented this in ISC DHCP on Linux. We have multiple VLANs with one or more public-IP subnets and one RFC1918 quarantine subnet each. All clients are leased IPs in the public-IP subnet(s) unless you're in a list of known bad MACs. Then, you are sent to the quarantine subnet so that your traffic is unroutable on the Internet (you are isolated by subnet only, not by VLAN). We would like to move to Windows DHCP in light of the IPAM role but I cannot figure out how to replicate this in Windows DHCP 2012 (Assign DHCP IPs for specific MAC prefixes on Windows Server 2008 R2 suggests it was not possible in 2008 R2), even while using policies. So here's what I'd like: The administrator/help desk provides and maintains a list of MAC addresses that are to be quarantined. The DHCP server places those MACs into the quarantine subnet on the respective VLAN, no matter which VLAN the client is in. I don't think reservations would work: We currently have about 300 registered bad MACs and about 12 VLANs. I don't want to make 300 x 12 reservations nor have to add 12 reservations per new MAC address. Not to mention all of the quarantine subnets are /24s. We do not have NPS/NAC. You do not have to register your MAC address get network access. We use Cisco routers/switches. Thanks.

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  • RRAS with DHCP when the IP pool is on a different subnet

    - by John B
    I run a small business network and the last couple of days I have been setting up some equipment to add VPN capabilities to our network. I've got the following set up: Windows 2008 R2 with RRAS - 172.22.200.50 Cisco RV082 router - 172.22.100.1 / 172.22.200.1 The Cisco router only support DHCP on a single class C network; 172.22.100.0/24. On the Cisco router I have set up an additional subnet; 172.22.200.0/24. The DHCP range is 172.22.100.200-254 When a PPTP connection comes in to the router, it is forwarded to my RRAS at 172.22.200.50. If I configure RRAS to assign IPs from a static pool on the 172.22.200.0/24 subnet everything works fine except the DNS suffix / search domain. However, if I set RRAS to use DHCP I am no longer able to contact any devices on the network. The IP I receive is on a different subnet (172.22.100.0/24). Is it possible to still use DHCP as the method of ip assignment in RRAS, even when the IP adresses assigned are in a different subnet? If yes, what piece of configuration am I missing to fix the VPN connection issues mentioned in the paragraph above. The reason I want RRAS with DHCP to work is because from what I have understood, this is the "only" way to hand out a DNS suffix to VPN clients. Any help on this matter is greatly appreciated!

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  • How to forward DHCP A record registration to another domain

    - by ServerUsedConfusion
    I'm currently at work and we're having some troubles. We want to create a new domain for our area, but the DHCP server is not in our control. The DHCP server lists DNS as testdomain.com, however we want to make a new domain called testdomain1.com. We've been thinking of fowarding the DNS from testdomain.com to testdomain1.com so that way DHCP doesn't have to be changed. Basically Client requests testdomain1.com DHCP says DNS is at testdomain.com testdomain.com tells client to go to testdomain1.com client registers in AD at testdomain1.com and adds it's A record to DNS at testdomain1.com

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  • SQL SERVER – Color Coding SQL Server Management Studio Status Bar – SQL in Sixty Seconds #023 – Video

    - by pinaldave
    I often see developers executing the unplanned code on production server when they actually want to execute on the development server. Developers and DBAs get confused because when they use SQL Server Management Studio (SSMS) they forget to pay attention to the server they are connecting. It is very easy to fix this problem. You can select different color for a different server. Once you have different color for different server in the status bar, it will be easier for developer easily notice the server against which they are about to execute the script. Personally when I work on SQL Server development, here is the color code, which I follow. I keep Green for my development server, blue for my staging server and red for my production server. Honestly color coding does not signify much but different color for different server is the key here. More Tips on SSMS in SQL in Sixty Seconds: Generate Script for Schema and Data in SQL Server – SQL in Sixty Seconds #021  Remove Debug Button in SQL Server Management Studio – SQL in Sixty Seconds #020  Three Tricks to Comment T-SQL in SQL Server Management Studio – SQL in Sixty Seconds #019  Importing CSV into SQL Server – SQL in Sixty Seconds #018   Tricks to Replace SELECT * with Column Names – SQL in Sixty Seconds #017 I encourage you to submit your ideas for SQL in Sixty Seconds. We will try to accommodate as many as we can. If we like your idea we promise to share with you educational material. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Database, Pinal Dave, PostADay, SQL, SQL Authority, SQL in Sixty Seconds, SQL Query, SQL Scripts, SQL Server, SQL Server Management Studio, SQL Tips and Tricks, T SQL, Technology, Video

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  • PXE boot linux. PXE-E51: No DHCP or proxyDHCP offers were received

    - by athspk
    I am trying to have an ubuntu box (192.168.10.9) acting as a PXE server, but i have trouble getting DHCP to work. The PXE server is connected to a SOHO router (192.168.10.1) acting as a switch. I have disabled the DHCP server on the router. $ dhcpd --version isc-dhcpd-4.2.4 The contents of /etc/dhcp/dhcpd.conf ddns-update-style none; option domain-name-servers 192.168.10.1; default-lease-time 3600; max-lease-time 7200; authoritative; log-facility local7; allow booting; allow bootp; subnet 192.168.10.0 netmask 255.255.255.0 { range dynamic-bootp 192.168.10.101 192.168.10.200; option routers 192.168.10.1; option broadcast-address 192.168.10.255; next-server 192.168.10.9; filename "/tftpboot/pxelinux.0"; } The contents of /etc/default/isc-dhcp-server INTERFACES="eth0" When the client boots, it tries to get an IP address from the server but fails with the following Error message: PXE-E51: No DHCP or proxyDHCP offers were received. On Server side, i was tailing /var/log/syslog while the client tries to boot: Dec 4 12:57:10 athspk-Dell dhcpd: DHCPDISCOVER from 00:1f:d0:8e:6b:db via eth0 Dec 4 12:57:11 athspk-Dell dhcpd: DHCPOFFER on 192.168.10.101 to 00:1f:d0:8e:6b:db via eth0 Dec 4 12:57:12 athspk-Dell dhcpd: DHCPDISCOVER from 00:1f:d0:8e:6b:db via eth0 Dec 4 12:57:12 athspk-Dell dhcpd: DHCPOFFER on 192.168.10.101 to 00:1f:d0:8e:6b:db via eth0 Dec 4 12:57:17 athspk-Dell dhcpd: DHCPDISCOVER from 00:1f:d0:8e:6b:db via eth0 Dec 4 12:57:17 athspk-Dell dhcpd: DHCPOFFER on 192.168.10.101 to 00:1f:d0:8e:6b:db via eth0 Dec 4 12:57:25 athspk-Dell dhcpd: DHCPDISCOVER from 00:1f:d0:8e:6b:db via eth0 Dec 4 12:57:25 athspk-Dell dhcpd: DHCPOFFER on 192.168.10.101 to 00:1f:d0:8e:6b:db via eth0 Please advise. Thanks in advance

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  • A Linux DHCP server that will listen on an non-broadcast (tap) interface?

    - by TomOnTime
    Are there any Linux DHCP servers that will listen to what Cisco calls an "unnumbered" interface, or what others might call a "NBMA" (non-broadcast) interface. I have a Linux system that connects to a number of others using GRE tunnels. The machines on the other end send DHCP requests to this machine, I can see them with tcpdump. However, ISC DHCP 3.0.3 refuses to listen to the interface because it is non-broadcast. The interface I'd like DHCP to listen to is: tap2 Link encap:Ethernet HWaddr removed-for-privacy inet6 addr: removed-for-privacy/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:518 errors:0 dropped:0 overruns:0 frame:0 TX packets:510 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:196242 (191.6 KiB) TX bytes:52425 (51.1 KiB)

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  • Windows Server 2003 Terminal Server does not give out all available licenses

    - by Erwin Blonk
    I installed the Terminal Server role in Windows Server 2003 Standard 64-bits. Still, only 2 connections are allowed. The License Manager says that there are 10 Device CALs available, which is correct, and that none are given out. For good measure I let the server reboot, to no effect. Before this, there was another server (same Windows, except that it is 32 bits) active as a licensing server. I removed the role first and then then added it to the new server. I then removed the Terminal Server Licensing Server component off the old one and added it to the new one. After that, I added to licenses. When that didn't give the required result, I rebooted to new server. Still, the new server, with licenses and all, acts as if it has the 2 license RDP. The server are all stand-alone, there is no active directory been set up. Both servers are in different workgroups. Update (4/12/10): The server has changed the entries in the Terminal Server Licensing a few times. After installing the licenses it added an entry of which the exact phrasing I forgot but it was about temporary Windows 2003 device licenses. Later it added Windows Server 2003 - TS Per Device CAL. The temporary held 2 licenses (standard RDP licenses, I think) and the other 10. At some point, seemingly unrelated from the testing we did, it used a licenses from the new pool. This morning, 2 licenses were used from the pool of 10 and only 1 from the temporary/RDP pool (I wish I had screenshots to show, it changed every few hours oir so it seems). Although I had already activated the server over the internet, and re-activated it, I decided to go through the whole procedure by phone. Long story short, here is what it says now: Existing Windows 2000 Server, type:built-in [no licenses used, I add for for sake of being complete] Windows Server 2003 - Terminal Server Per Device CAL Token, type:open [none of 10 used] Windows Server 2003 - TS Per Device CAL, type:open [3 of 10 used] As I tried to explain, this is the end result after a few changes, most of which I can't directly connect to any action from my part. Only going to the activation procedure by phone seemed to directly effect the TS, resulting in the above configuration. Still, it is impossible to connect with more than 3 people, which is 1 up from the 2 that could connect yesterday. TS does say 7 licenses are avaible. Yet it won't give them out.

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  • dnsmasq(as DHCP server) isn't working in KVM+libvirt envirmont

    - by user2681054
    I'm using dnsmasq as DHCP server in VM environment. But It didn't working. I disabled basic DHCP feature in libvirt. <network> <name>default</name> <uuid>84da0678-e56d-8fc2-6f8b-e8eba784849a</uuid> <forward mode='nat'/> <bridge name='virbr0' stp='on' delay='0' /> <mac address='52:54:00:7B:64:0B'/> <ip address='192.168.122.1' netmask='255.255.255.0'> </ip> </network> As you can see, I removed this tag! <dhcp> <range start='192.168.122.2' end='192.168.122.254' /> </dhcp> And I installed dnsmasq in Host machine. During installation dnsmasq, there was an error message about 127.0.0.1.(dnsmasq: failed to create listening socket for 127.0.0.1) So I commented out listen-address option, and added dhcp-range/dhcp-option options, like this. listen-address=127.0.0.1 dhcp-range=192.168.122.100,192.168.122.200,24h dhcp-option=option:router,192.168.122.1 That's all I've done with dnsmasq. But guest VM couldn't get IP address from host which is dnsmasq server running. After that , I installed isc-dhcp-server instead of dnsmasq.... and it works! But I still want to use dnsmasq instead of isc-dhcp-server. Are there any helping hands? I disabled host machine's firewall. I've heard that libvirt basically use dnsmasq. Is this the reason why I couldn't use dnsmasq in libvirt environment?

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  • DHCP forwarding behind access list on a Cisco Catalyst

    - by Ásgeir Bjarnason
    I'm having some trouble with forwarding DHCP from a subnet behind an access list on a Cisco Catalyst 4500 switch. I'm hoping somebody can see the mistake I'm making. The subnet is defined like this: (first three octets of IP addresses and vrf name anonymized) interface Vlan40 ip vrf forwarding vrf_name ip address 10.10.10.126 255.255.255.0 secondary ip address 10.10.10.254 255.255.255.0 ip access-group 100 out ip helper-address 10.10.20.36 no ip redirects I tried turning on a VMWare machine on this subnet that was configured to use DHCP, but I never got a DHCP response and the DHCP server didn't receive a request. I tried putting the following in the access-list: access-list 100 permit udp host 10.10.10.254 host 10.10.20.36 eq bootps access-list 100 permit udp host 10.10.10.254 host 10.10.20.36 eq bootpc access-list 100 permit udp host 10.10.20.36 host 10.10.10.254 eq bootps access-list 100 permit udp host 10.10.20.36 host 10.10.10.254 eq bootpc That didn't help. Can anybody see what the problem is? I know that the DHCP server works; our whole network is running off of this DHCP server I also know that the subnet works because we have active servers running on the network The DHCP scope is already defined on the DHCP server The subnet is correctly defined on the VMWare server (already servers running on the subnet on VMWare) Edit 2012-10-19: This is solved! The subnet had formerly been defined as a /25 network, but was then expanded into a /24 network. When the DHCP scope was altered after this change it was done incorrectly; the gateway was moved to .254, the leasable IP range was in the lower half of the /24 subnet but we forgot to change the CIDR prefix from /25 into /24. This happened some 2 years ago, and we didn't need to use DHCP on this server network again until this week. Thank you MDMarra and Jason Seemann for looking at the question and trying to troubleshoot. Now I'm wondering if I should mark Jason's answer as the accepted answer (I am new to the Stack Exchange network, so I don't know the etiquette of what to do if I misstated the question like in this case).

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  • Check DHCP Option content

    - by Nathan Berviller
    Is it possible DHCP client check the contents of an option ? I need provisioning a Linux server with DHCP option 140 (option-140). But the server behaves as if the DHCP did not contain the information. In the file /var/lib/dhcp/dhclient.eth0.leases I do not see advanced DHCP options (option-140, option-141, option-142). How can I manually request the DHCP server to give me the contents of an option (to control the content) ? Bests Regards, Nathan

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  • Which DHCP Client OS Support DHCP Option 119 Domain Suffix Search?

    - by netlinxman
    The ability for DHCP servers (Microsoft, ISC, VitalQIP, IPControl, Infoblox, etc.) to deliver DHCP Option 119 - Domain Suffix Search Lists has been around for a long time. Initially, DHCP Client Support for this option was scarce. So, my question is this: Which DHCP Client Operating Systems support the use of DHCP Option 119 sent from a DHCP server? I am specifically looking for Mfg, and family/version/release info. Thanks!

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  • osx 10.6 dhcp client-id option

    - by Clustermagnet
    Trying to join a osx machine on a dhcp network which forces certain client IDs. Even if I was to modify the client-id via the network properties, the DHCP server is not accepting this request, since Windows and Apple send this via different options You can set the ClassID in the Network Control Panel in the DHCP Client ID box. The trick lies in setting up your DHCP server to recognize it. Windows XP sends the DHCP class ID via DHCP option 77, and OS X sends it via option 61. You'll have to set your DHCP server to check for option 61, +with an offset of 1 and a length of 9+. That's the tricky bit. So, without modifying the DHCP server... (which does not belong to me), is there anything that can be done on OSX to modify the client-id option to be 77?

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  • Can we configure windows 2008 DHCP server to not ignore the broadcast falg of DHCP requests?

    - by Mathieu Pagé
    We have a Cisco WAP4410N access point that does not relay broadcast packets from the wired network to the wireless clients when the network is secured by WPA2. This cause problem with Windows server's DHCP server that respond to DHCP request by broadcasting it's OFFER instead of Unicasting it like it's asked by Windows (and Android and iOS) clients. When we had a Windows 2003 server we configured the server not to ignore the broadcast flag (following these instructions) and it solved the problem. Now we upgraded our servers to Windows 2008 servers and the problem is back. Unfortunately, it seems Windows server 2008 ignore the IgnoreBroadcastFlag parameter. Is there any other way to make sure that Windows Server 2008 respond to DHCP requests using Unicast instead of broadcast? mp

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  • Microsoft DNS/DHCP using DDNS - Domain Suffix issue

    - by Samuurai
    I have an issue with our Microsoft DNS server, we're getting the dreaded "DNS Update Failed" in the DHCP logs. We have two forward lookup zones, blah.com and somethingelse.com - blah.com is the one I want the workstations/DHCP to dynamically update. However, I can only get it to work if I specify blah.com as the domain suffix in the network connection properties. I can think of two possible solutions, but have no idea how to implement them or if they're possible: 1) Designate a blah.com as the "default" zone somehow on the DNS server, so all updates are sent to that zone unless the client's domain suffix is somethingelse.com 2) Use DHCP option 15, which sets the domain suffix. - We're currently doing that, but it doesn't seem to take it into account when updating DNS. Can anyone please shed some light? Thank you.

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  • Multiple VLANs, multiple subnets, single DHCP server?

    - by EightQuarterBit
    Hey guys! At my job we are prepping to transition from multiple LANs connected over slow VPN connections to a single MAN connected over fiber, and I've got a few questions. First of all, we are planning on making each physical site its own VLAN, but we would like to have a single DHCP server at the data center hand out IPs to each VLAN. We've pretty much got the VLAN tagging structure all worked out, but we would like to have our single DHCP server assign different subnets of IPs to each VLAN. For instance, VLAN 2 gets 10.0.2.x through 10.0.4.x, VLAN 3 gets 10.0.5.x through 10.0.7.x etc. We are an Active Directory based shop and we have a Server 2003 box handling DHCP (though we aren't averse to upgrading it to server 2008.) Is this feasible, or am I pipe-dreaming?

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  • Windows Server 2003 Terminal Server with installed licenses will not go beyond 2 connections

    - by Erwin Blonk
    I installed the Terminal Server role in Windows Server 2003 Standard 64-bits. Still, only 2 connections are allowed. The License Manager says that there are 10 Device CALs available, which is correct, and that none are given out. For good measure I let the server reboot, to no effect. Before this, there was another server (same Windows, except that it is 32 bits) active as a licensing server. I removed the role first and then then added it to the new server. I then removed the Terminal Server Licensing Server component off the old one and added it to the new one. After that, I added to licenses. When that didn't give the required result, I rebooted to new server. Still, the new server, with licenses and all, acts as if it has the 2 license RDP. The server are all stand-alone, there is no active directory been set up. Both servers are in different workgroups.

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  • Transferring DHCP using Windows Server Migration Tool - Why is Powershell is crashing on the import of the .mig file?

    - by Mike
    I am migrating DHCP from a windows server 2003R2 DC to a Windows Server 2008R2 DC I've followed this video and its predecessor (Installing Windows Server Migration Tools) http://technet.microsoft.com/en-us/video/migrating-dhcp-using-the-windows-server-2008-r2-migration-tools.aspx I went through everything smoothly until the last step. I have exported a .mig file with my DHCP configuration on the old 2003r2 server. I transferred this .mig file over to my 2008R2 server, when running the import command, it will appear to work for a minute or two and then I get a generic windows "Powershell has stopped working" error and I have to close the program. Under the problem details I see the following: FileVersionOfSystemManagementAutomation: 6.1.7600.16385 InnermostExceptionType: System.AccessViolationException OutermostExceptionType: System.AccessViolationException DeepestPowerShellFrame: unknown OS Version: 6.1.7600.2.0.0.272.7 LocaleID: 1033 Seems like there are permissions issues maybe? I am running powershell as an admin and am logged in to the server as a domain administrator. Any Ideas? Thanks

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  • setup dhcp server - "Job failed to start"

    - by jdicarreira
    I have an eth0 and eth1, eth0 has dynamic ip and on eth1 i setup static ip: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp auto eth1 iface eth1 inet static address 10.10.0.1 netmask 255.0.0.0 gateway 10.10.0.1 ` and then i setup the "isc-dhcp-server" with the fowling command: INTERFACES="eth1" Finally... I went to this one "dhcpd.conf", with the fowling comand: default-lease-time 650; max-lease-time 79520; option subnet-mask 255.0.0.0; option broadcast-address 10.10.0.255; option routers 10.10.0.2; subnet 10.10.0.0 netmask 255.0.0.0 { range 10.10.0.10 10.10.0.250; } When I try to "sudo /etc/init.d/isc-dhcp-server start", I get "start: Job failed to start" Anyone knows whats wrong? :/

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  • Migrate database from SQL Server Standard to SQL Server Express for DotNetNuke

    - by Bjørn
    Hello, we have an old server that we want to dedicate fully as a public webserver (hosting a few DotNetNuke sites), and for this purpose we would like to install SQL Server Express (probably 2008) on the server and thus have both the Database server and the Web Server on the machine. But: The databases for the webserver are hosted on a SQL Server 2005 Standard today. So the question is: Is it possible to move a database from a Standard Server to an Express Server?

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  • Windows Server 2003 Terminal Server does not give out all available licenses (solved)

    - by Erwin Blonk
    I installed the Terminal Server role in Windows Server 2003 Standard 64-bits. Still, only 2 connections are allowed. The License Manager says that there are 10 Device CALs available, which is correct, and that none are given out. For good measure I let the server reboot, to no effect. Before this, there was another server (same Windows, except that it is 32 bits) active as a licensing server. I removed the role first and then then added it to the new server. I then removed the Terminal Server Licensing Server component off the old one and added it to the new one. After that, I added to licenses. When that didn't give the required result, I rebooted to new server. Still, the new server, with licenses and all, acts as if it has the 2 license RDP. The server are all stand-alone, there is no active directory been set up. Both servers are in different workgroups. Update (4/12/10): The server has changed the entries in the Terminal Server Licensing a few times. After installing the licenses it added an entry of which the exact phrasing I forgot but it was about temporary Windows 2003 device licenses. Later it added Windows Server 2003 - TS Per Device CAL. The temporary held 2 licenses (standard RDP licenses, I think) and the other 10. At some point, seemingly unrelated from the testing we did, it used a licenses from the new pool. This morning, 2 licenses were used from the pool of 10 and only 1 from the temporary/RDP pool (I wish I had screenshots to show, it changed every few hours oir so it seems). Although I had already activated the server over the internet, and re-activated it, I decided to go through the whole procedure by phone. Update 2 (4/12/10) The problem has been solved. It seems the activation over the web, while it said to have succeeded, did not work correctly. After activating by phone, it did work. What was different from the old setup and what put me on the wrong foot from that moment, was that I now need to create seperate user account because a session with one user account will be taken over by someone else when that account is used by that person. On the previous server, it was possible to open several sesions with the same account. We now use Per Device licenses, I'm not sure what was used before. Thanks all for the replies.

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  • DHCP Requests Failing

    - by Jon Rauschenberger
    Clients on our network recently started receiving this error when attemping to acquire an IP Address from our DHCP Server: "the name specified in the network control block (ncb) is in use on a remote adapter" The DHCP Server is a Windows Server 2008 R2 machine, most of the client are Win 7. Can't find much on that error, anyone have an idea what could cause it? Thanks, jon

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  • DNS and DHCP dies after ~2 days of use on ClearOS

    - by TheLQ
    I'm using ClearOS (based on CentOS, so any info specific to it should apply here) as a gateway, DHCP, and DNS server. I had this server running perfectly for a month or two before replacing it with another server. However due DNS and DHCP failing 2 days in and a host of other performance issues (the box was a little underpowered), I changed back to the origional server. However 2 days in DHCP and DNS are failing again, and I'm out of idea's on why. In both cases to my knowledge no network or server changes occurred after installation. Right after installing (and at least a day in) DNS and DHCP was working just fine. However later (Day 2) I get a call saying their internet is down (translation: Nobody can get to websites because DNS is down) I've tried to fix the problem by checking if the dnsmasq is even running (it is), restarting the service, and restarting the server to no effect. I do have two internal servers that have static DHCP leases but one's lease must of expired as I can't connect to it anymore. I'm hesitant to do any dhcp testing on the last server as I'll not be able to connect to it anymore. Is there anything anyone can think of on why DNS and DHCP would fail 2 days in to running perfectly? More info: Running dnsmasq in debug mode. This is all that's displayed even when running nslookup quackwall. I'm not sure though if nslookup commands should show up in the log [root@quackwall ~]# /usr/sbin/dnsmasq -dq dnsmasq: started, version 2.49 cachesize 150 dnsmasq: compile time options: IPv6 GNU-getopt no-DBus no-I18N DHCP TFTP dnsmasq-dhcp: DHCP, IP range 10.0.0.100 -- 10.0.0.254, lease time 12h dnsmasq: reading /etc/resolv.conf dnsmasq: using nameserver 74.128.17.114#53 dnsmasq: using nameserver 74.128.19.102#53 dnsmasq: read /etc/hosts - 5 addresses dnsmasq-dhcp: read /etc/ethers - 2 addresses On the other server DNS and the Gateway are all configured correctly (10.0.0.2 is quackwall) lordquackstar@quackgame:~$ netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 10.0.0.0 0.0.0.0 255.255.240.0 U 0 0 0 eth0 0.0.0.0 10.0.0.2 0.0.0.0 UG 0 0 0 eth0 lordquackstar@quackgame:~$ cat /etc/resolv.conf nameserver 10.0.0.2 domain highwow.lan search highwow.lan

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