I don't really have a reason for this currently. I recognize all the MAC address on my DHCP client list and keep it rather well locked down. I was just wondering if there was something I could run on the terminal to get more information on a given MAC address on my network. Something kind of like whois for websites.
View 1 Replies
I am puzzled with trying to configure a linux (openSUSE) client to dhcp to eBox DHCP server. I am using dhclient to lease an IP address with dhclient eth0 -s 10.45.48.108 and get a response
openSUSE11232CL1 dhclient: DHCPDISCOVER on eth0 to 10.45.48.108 port 67 interval 4
openSUSE11232CL1 dhclient: DHCPOFFER from 10.45.48.108
openSUSE11232CL1 dhclient: DHCPREQUEST on eth0 to 10.45.48.108 port 67
openSUSE11232CL1 dhclient: send_packet: Network is unreachable
openSUSE11232CL1 dhclient: send_packet: please consult README file regarding broadcast address.
The server reports eBox141 dhcpd: DHCPDISCOVER from 00:0c:29:3e:57:a3 (openSUSE11232CL1.domain.net) via eth0
eBox141 dhcpd: DHCPOFFER on 10.45.200.2 to 00:0c:29:3e:57:a3 (openSUSE11232CL1.domain.net) via eth0
I interpret this as the server receives the request and the client accepting it but the lease does not last long and the connection breaks. what this could be and why the connection breaks? Or my undestanding is totally wrong on how it works and should work? And BTW, where is that README file that's referenced in the message I receive on the client?
Version 10.04 LTS. Installed desktop version and network worked but I needed a static IP address and the install configures for a DHCP configured address. I tried changing to static address using the System->Preferences->Network Connections application but was unable to get the system to come up with the network up.
So I manually modified the /etc/network/interfaces and the /etc/resolv.conf files. I restart the system but when I do an ifconfig, I don't see a configured IP address on eth0 (only the loopback address). If I run /sbin/ifup eth0 everything then works fine and ifconfig shows the correct address bound to eth0.
My files are as follows:
I'm running Ubuntu 10.10 and I'm having problems trying to assign it a static IP address. No matter what I put in the Preferences->Networking area (identifying the interface as Manual)... it still will query DHCP for an address if I run the dhclient command. I'm using to using ubuntu server where I just set the IP in the interfaces config file.
View 1 Replies View Relatedwhen I change the hostname on my Ubuntu server, the DHCP clients table in my router is dropped.I'm running 32-bit Ubuntu Server 10.10. My router is a Linksys WRT54GL with firmware version 4.30.15. I'm changing the hostname by modifying /etc/hosts and /etc/hostname. I've also tried changing the hostname using the Linux hostname command in a terminal, but this does not seem to behave correctly according to the manpages (it does not actually change the hostname, or update either of the aforementioned files).
I've also tried using a different router - a Linksys BEFSR41 - but the DHCP table is still dropped when I change the hostname on my server (although this router is not all that different from my other one).
On my server I've a OpenVPN gateway and a DNS bind9 serveur At the moment, OpenVPN send opendns address to the clients and it works fine. I would like to use my DNS server for my clients to work with any DNS address. Here is OpenVPN config :
[Code].....
I have openvpn tunnel setup between two CentOS servers. One of the CentOS servers also acts as a DHCP server for some client computers.
Server A= OpenVPN server
Server B= OpenVPN client (connects to Server A with OpenVPN)
The two CentOS servers can ping each other (172.16.0.0/24) via the tun0.
However, client computer connected to Server B (DHCP server) can't reach 172.16.0.1 (which is the OpenVPN server).
I think I am missing some routing in my "ip route show". Following is the full picture:
What command can I issue to get this fixed? something along ip route add?
There is no firewall service on both end. service iptables stop! I can't bridge eth1 and tun0 as DHCP server might mess up the other side. I can't do a push of "redirect-gateway def1" because then clients loose their IP as they send DHCP requests to Server A.
what are use cases for static ip address for clients or servers.
View 3 Replies View RelatedI'm having really weird and frustrating DNS issues with my clients unable to properly resolve the server's ip address. They can resolve each other's, and outside systems, but not the server - at least, not correctly, and not all the time.
I have one Ubuntu server set up that does both DHCP and DNS serving to the Windows systems. The server has DNS forwarding turned on to forward to OpenDNS's servers (I've tried using my ISP's dns servers but the problem remains).
The server is *not* set up as a firewall; I am actually using a DLink router for that, and the Dlink is *not* set up to serve up DHCP nor DNS.
What I am getting is that my clients - and there are nothing but Windows clients - will not resolve the name of the server. For example, if I do: ping linuxserver
I get back a false IP address of 192.168.0.64 (and I've seen once a 192.168.2.49).
If, however, I put a dot in there: ping linuxserver.
I get back the *correct* IP address of 192.168.0.2, and thereafter, ping'ng linuxserver without the dot will work. Until the dns cache expires, either naturally or with ipconfig /flushdns on the windows clients.
The client *are* getting valid dhcp leases and can resolve everything happy-happy, they just will not get the proper address of the server 100% of the time.
Is there a way to configure DHCP IP Reservation thru MAC ? eg. {MAC ADDRESS} 192.168.1.23 So, when somebody owns this MAC address leases IP, it will give the one in reservation. Also, for security in mind, DHCP will ONLY lease IP if its MAC address is listed, otherwise, DHCP will NOT give IP.
View 1 Replies View RelatedI'm using Ubuntu 9.10, and I want DHCP to assign an IP address automatically. I can ping my router, and get a reply. I just have no idea how to do this.I'm trying to get my Ubuntu machine onto my Windows network.
View 9 Replies View RelatedDoes anyone know an easy way to do this? I can't seem to figure it out.
View 6 Replies View RelatedI have 17 system (sys1,sys2,sys3.....sys17) in my office, and i am willing to setup a dedicated system to act as a firewall for that i have selected sys1 with two NIC(eth0 for local network and eth1 for internet) and i have configured to access internet in my office for that i have opened a wellknown port 80.but my clients are not accessing the internet..
and please check my sample IP configuration !!!
interface : eth1 (ISP IP)just for example
IP :192.168.0.2
gateway:192.168.0.1
dns:202.56.230.5
dns:202.56.230.6
Interface : eth0 (my local lan )
192.168.1.1
255.255.255.0
IP address of xp clients ranges form 192.168.1.2 to 192.168.1.16 with default 255.255.255.0
my question is that which gateway address and dns i have to give to my clients for accessing internet ?...
Can't change from dhcp to static ip address.I've installed Oracle's version of Linux Redhat 5, but I'm having no success changing from dhcp to a static IP address. My machine is plugged directly into a Belkin router which has the IP address: 192.168.2.1.If I use the gui: /usr/bin/system-config-network and set the network device to dhcp,it works fine. But if I set the IP address manually, I get no internet traffic, and if I ping an internet website, "network unreachable".The installation instructions for Oracle say that they want a full domainname. I've tried gateway.2wire.net. This worked in the last place I did a successful installation.It was the address of my ATT router. If I plunked that into a browser, I got the router configuration.
View 7 Replies View RelatedI would like to define a IPv4LL address (169.254.0.0/16) in parallel with the DHCP address received from the server on the same network card. I tried to modify /etc/network/interfaces to that effect (see below), but either I only manage to get one of the two at any time.
auto lo
iface lo inet loopback
auto eth0 eth0:1
iface eth0 inet dhcp
iface eth0:1 inet ipv4ll
The cable internet I'm using runs on Dynamic DHCP IP addresses. I changed it to a static IP address in my router settings, but it keeps changing. This means that I can't connect to my home server from a remote location.
Is there anyway to run my ubuntu server on a DHCP IP address without connecting through my router 192.168.1.xxx?
I noticed that my internet connection wasn't automatically brought up each time I logged into Fedora so I opened the system-config-network tool and edited my network adapter by checking the box marked "automatically start at boot/login." To my surprise, the connection went down and upon trying to click on the device to let the manager bring up the connection the greyed-out phrase "device not managed" appeared underneath the device name and wouldn't allow me to connect.
Even when I used ifconfig/dhclient to get the connection up nothing happened. I could get the router to assign an IP address through DHCP, pinged a few sites to make sure it was legit, but still couldn't use firefox to browse anything. Seems as if network manager GUI is conflicting with command line attempts to bring the network up. I'd like to permanently disable system-config-network if possible because it's acting screwy!
I have an Ubuntu 10.04 server. It gets its IP address by DHCP (the router has a fixed reservation so it always gets the same one). However, it needs its nameserver to be itself, and not the DNS servers given out by the router. How can I make dhcp not overwrite resolve.conf?
(Yes I know I could just set a static IP. But I'm testing stuff out here, and want to know if it can be done without doing that.)
We have a large number of devices on our LAN with the mac prefix of 00:60:60. We want to assign these addresses from a separate address pool. I've created two classes, one to match 00:60:60 and another that I want to contain any other device. When i try to start the server I get:
/etc/dhcp3/dhcpd.conf line 33: boolean expression expected
match if not binary-to-ascii(16,8,":",substring(hardware, 1, 3))
^#this carrot should be under the last parenthesis#
Configuration file errors encountered -- exiting
Here is the relevant section of /etc/dhcp3/dhcpd.conf
class "006060" {
match if binary-to-ascii(16,8,":",substring(hardware, 1, 3)) = "00:60:60";
}
[Code].....
I've tried a few variations on that line. I've spent days trying to find any examples of "match if not" and haven't found anything. I assume it's going to be something to do with parenthesis/quote placement. Oh and this is ISC DHCP Server V3.0.4.
I have an Ubuntu Server 10.04.1 that I have given a static IP address. Every six hours or so I will lose connectivity to it and when I type ifconfig to look at the network information, it has been given an address via dhcp. If I run the /etc/init.d/networking restart command the IP address goes back to my static address and things are fine for another 6 hours or so. Here is what is in my interfaces file:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 10.60.82.15
netmask 255.255.0.0
broadcast 10.60.255.255
gateway 10.60.254.254
This machine is also a DHCP server and I checked to make sure there are no other DHCP servers on my network. Right now my fix is to have a Cron job running that runs the reset command every 5 hours, but I would like to find a more permanent solution.
I want to setup 1Gbps our lab network and we purchased 'Buffulo Giga layer switch ' with 24ports. Is there a way to tell DHCP to assign specific IP to a particular MAC address of a machine ? We want to use DHCP and whatever the port we use ,it should have same IP ..
View 1 Replies View RelatedI am attempting to get this network card running under CentOS 5.2 but have had no luck. Some sites say to use the sk98lin driver, others the skge, which I can't find at all. I have tried multiple versions of the driver in rpm but none seem to work. The card shows under the network manager but will not get an IP address from the DHCP server.
Here are the outputs for this card.
uname -rmi
2.6.18-92.1.10.el5 x86_64 x86_64
lspci -m
04:01.0 "Ethernet controller" "D-Link System Inc" "DGE-530T Gigabit Ethernet Adapter (rev 11)" -r11 "D-Link System Inc" "DGE-530T Gigabit Ethernet Adapter (rev 11)"
lspci -n | grep "$(/sbin/lspci | awk '/net/ { print $1 }')"
04:01.0 0200: 1186:4b01 (rev 11)
lspci -vv
04:01.0 Ethernet controller: D-Link System Inc DGE-530T Gigabit Ethernet Adapter (rev 11) (rev 11)
Subsystem: D-Link System Inc DGE-530T Gigabit Ethernet Adapter (rev 11)
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (5750ns min, 7750ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 121
Region 0: Memory at febfc000 (32-bit, non-prefetchable) [size=16K]
Region 1: I/O ports at e800 [size=256]
Expansion ROM at e0000000 [disabled] [size=128K]
Capabilities: [48] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=1 PME-
Capabilities: [50] Vital Product Data
How to get this working as we have 3 of these cards for computers without a Gb NIC and I don't want to fight with it 3 separate times.
I have a strange problem for internet. My clients (winxp - S2) can't get internet.Let me explain my scenerios. Fedora 10 with lan (eth0) having direct internet from dsl model, client (XP service pack 2) can use samba shares using dhcp (wlan0) installed in Fedora 10 box. client can ping my linux box.Now problem is: client (dosbox) can ping the google ip address (i.e ping 74.125.39.106) but can't use 'ping www.google.com'. That means ping with ip works for internet from my client. My linux box can. I can use internet from FC10 but can't use iexplorer from my client to have internet. I have enable ipmasquarding in Firewall and dhcpd is running on wlan0 for dynamic ip address of my clients.Can someone suggest me what kind of problem having I? What should i do to success iexplorer for internet? what possibly am i missing?
View 3 Replies View RelatedI have installed Fedora 10 on my A860 Dell Vostrol Laptop with AR242X Atheros Wireless card. Wireless card worked out of the box and i could detect wireless network and connect to it. But i have a problem that, my wireless connection is not able to get IP address from the DHCP server. Please help me out what can i do to get this working. I am using WEP security and authentication is open system.
I have windows 7 beta installed on the same machine and on that wireless network works fine so i am sure that there is no problem with the wirless network. I am using DIR-300 router from D-LINK. I tried to see packet log on wireshark and there i see that there is no reply to the DHCP discover message. Actually i don't see any RX packets at all. Which is not normal as there is traffic on the network.
When I install Fedora 10 on a new system, I let it default to DHCP. Later, I change the system to a fixed IP address by running system-config-network, selecting eth0, clicking on "Edit", clicking on "Statically set IP addresses:" and filling in the blanks. Is it possible to accomplish the same thing using commands that could be entered in a script? I assume one of them would be
Code:
ifconfig eth0 address XXX.XXX.XXX.XXX netmask 255.255.255.0
For changing the the mac address of my lan card( eth0) in linux fedora 9(solphur) i used this command
And i could change my mac address successfully but now i couldn't connect to my network via a dhcp server ( in configuration section of my router im going to check my new mac address (because i want to spoof) ,how i can do that?
This one has been bugging me for some time now. The network interface (as defined in Debian's /etc/network/interfaces file) fails to obtain an IP address from myuter. However dhclient br0 does.I'm using br0 since I run a XP virtual machine.network/interface changes are from a Debian howto on setting up the tap interface.As near as I can tell, the /etc/init.d/networking script basically calls /sbin/ifup -a. ifup is a binary.My /etc/network/interfaces file is:
auto lo
iface lo inet loopback
address 127.0.0.1
[code]...
My DHCP setting is disabled in fedora 12 . Previously i was using static IP address. I Want DHCP setting enable, any idea.
View 1 Replies View RelatedI've only been using linux for a few days so I don't know all the tricks. I'm pretty savy configuring windows networks however.My adapter is (according to windows) a: CNet PRO200WL PCI fast ethernet adapterLinux says it is a: 21x4x DEC-tulip compatible 10/100 EthernetI do seem to be getting an ip address from the DHCP router, but I cannout ping any other ips or connect to the internet.I've tried a bunch of different options, switching things back and forth, but it still doesn't work, and honestly i don't even know what some of the options mean.
ALSO, if this helps:
paladin:~ # ifconfig eth0
Eth0 Link encap:Ethernet HWaddr 00:08:A1:03:3C:99
[code]....
I'm having an issue configuring eth0. I'm using ubuntu 8.10 in a virtual machine (VirtualBox). The correct adapter is being used and it has worked in the past. I've tried placing eth0 in dhcp through the GUI and bash, but always get a 169 address or 127.
When I run the following command:
Code:
The output is:
Code:
