Networking :: Cinstall Dhcp Server Up & Running In Cent Os 5.3?
Feb 3, 2010how to install dhcp server up & running in cent os 5.3
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Ubuntu Networking :: Get A Dhcp Server Running On Laptop
Jan 19, 2010I'm trying to get a dhcp server running on my laptop. I want devices to be able to connect to a wireless AP I've set up (using hostapd) to then connect to the rest of the internet via my ethernet connection from the laptop.
However, I can't get dhcp to work properly. It always fails, leaving this message in the syslog
Code:
Jan 19 15:49:15 lucid-laptop dhcpd: WARNING: Host declarations are global. They are not limited to the scope you declared them in.
Jan 19 15:49:15 lucid-laptop dhcpd: WARNING: Host declarations are global. They are not limited to the scope you declared them in.
[Code].....
Ubuntu Networking :: DHCP Server No Longer Responses To DHCP Requests - Can't Ping Gateway
Oct 22, 2010Back in April I set up a Ubuntu DHCP server and a multiple VLAN network [URL] to migrate our various servers, workstations, etc off the 192.168.1.1 /24 network that everything was on because we where running out of address space. I built out the new network and everything worked great except our AD server would never get an IP address from the DHCP server (static reservation) and even if I set the IP statically on the AD server it couldn't ping the gateway and noone could log in. After several attempts to resolve this, including bringing in outside help, we where never able to figure out what the problem was.
Now 6 months later I have time to revisit the issue without effecting the live network. I used Acronis and imaged the AD server last Friday, cloned it on to another box with the same hardware, and put it up on the new network that's been sitting unused for the last 6 months. Today when I statically set the IP on the AD server (which is what I want) it connects and I can ping it's gateway 192.168.1.1 and all the way across vlans to a test sales agent workstation at 192.168.8.xxx on vlan 800 but only if I statically assign the agents station an IP address. When I try to get an IP address via DHCP it fails as destination unreachable. Nothing has changed in the last 6 months on the DHCP server but now it for some reason can't ping its default gateway 192.168.1.1. All of the config files are the same as they where left from the post linked above aside from the vlan id's used where changed from 1's to 100's (i.e. vlan 3 is now vlan 300) /etc/network/interfaces
Code:
auto lo
iface lo inet loopback
auto vlan100
iface vlan100 inet static
[code]....
why it can't reach the gateway, when I do a tcpdump I can see the DHCP requests come in on eth0 but the server never responds and I'm pretty sure its because it isn't "seeing" them since it thinks there isn't a network connection but I don't know how to trouble shoot to find out where the problem lies.
Ubuntu Networking :: DHCP Server No Longer Responds To DHCP Requests - Can't Ping Gateway
Jul 1, 2010Back in April I set up a Ubuntu DHCP server and a multiple VLAN network [URL] to migrate our various servers, workstations, etc off the 192.168.1.1 /24 network that everything was on because we where running out of address space. I built out the new network and everything worked great except our AD server would never get an IP address from the DHCP server (static reservation) and even if I set the IP statically on the AD server it couldn't ping the gateway and noone could log in. After several attempts to resolve this, including bringing in outside help, we where never able to figure out what the problem was.
Now 6 months later I have time to revisit the issue without effecting the live network. I used Acronis and imaged the AD server last Friday, cloned it on to another box with the same hardware, and put it up on the new network that's been sitting unused for the last 6 months. Today when I statically set the IP on the AD server (which is what I want) it connects and I can ping it's gateway 192.168.1.1 and all the way across vlans to a test sales agent workstation at 192.168.8.xxx on vlan 800 but only if I statically assign the agents station an IP address.
When I try to get an IP address via DHCP it fails as destination unreachable. Nothing has changed in the last 6 months on the DHCP server but now it for some reason can't ping its default gateway 192.168.1.1. All of the config files are the same as they where left from the post linked above aside from the vlan id's used where changed from 1's to 100's (i.e. vlan 3 is now vlan 300) /etc/network/interfaces
Code:
auto lo
iface lo inet loopback
auto vlan100
[code]....
why it can't reach the gateway, when I do a tcpdump I can see the DHCP requests come in on eth0 but the server never responds and I'm pretty sure its because it isn't "seeing" them since it thinks there isn't a network connection but I don't know how to trouble shoot to find out where the problem lies.
Networking :: Configure A (openSUSE) Client To Dhcp To EBox DHCP Server - Lease An IP Address
Mar 25, 2010I 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?
Ubuntu Networking :: If DHCP Not Available - Fallback And Start DHCP Server?
Mar 8, 2010Currently I have my eth0 interface getting a DHCP address but at times the DHCP server will not be reachable. Sooo what I would like my server to do is if it cannot find a DHCP server assign a static address to eth0. Then start the DHCP service so it can then dish out some addresses.How can I do this? Surely it is possible
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Aug 1, 2009I have 2 server behind the netgear router on my network . win2k3 and CentOS development server, I have port forarded 80 to win2k3 server which i can access over the internet and is accessable. However I can SSH CentOS machine and portforwarded 8080 and 82 for web access, I can't access via any of the port, browsers says UNABLE TO CONNECT.. there is no firewall in CentOS machine.
View 1 Replies View RelatedUbuntu Networking :: Find Gateway - DHCP Server - DNS Server From CLI ?
May 27, 2010On a remote system, when all you have is the ssh CLI -
How do you find out the ip addresses for:the Gateway
the DHCP server
the DNS server
Don't need to make any changes.
Which commands will display this info?
Server :: How To Install Yum In Cent Os 5
Feb 15, 2010i want to install yum in centos 5.4-i386 on amd system,buti am unable to do so, i can do yum installation in linux os very easily but in centos it is quit different .my ip is 192.168.0.55after this command
cp /etc/yum.reposed/CentOS-Base.repo /etc/yum.repos.d/base.repo
i did edit in this file
vi /etc/yum.repos.d/base.repo
[code]...
Ubuntu Servers :: DHCP Server And DHCP Client Simultaneously?
Aug 4, 2010I have an embedded device for which I've created an html configuration page. This page allows you to set static IPs, dhcp, and can scan for wireless devices.My problem is that in order to access the device it requires that it runs as a dhcp server otherwise people are not assigned an IP and so can not access the embedded devices static IP. (This config page is for the laymen and so they are not the type who are able to set up their own static IPs). One of the potential options is to have the device connect to the network on eth0 acting as a dhcp client. However this prevents me from running a dhcp server.One solution I can think of is running a dhcp server only if it doesn't detect another dhcp server running on the network.
View 4 Replies View RelatedServer :: Sendmail Not Working In Cent OS 4.6?
Apr 13, 2010I had configured my php to use sendmail as its mail agent. My server which is centOS 4.6 in this case runs in a lan.
What I need is that when i fire a mail function from php page hosted on my server in LAN, mail should get delivered to gmail or whatever destination address is..
But I am facing problem...When I open my php page which fires the mail, it takes long time to load say 1-2 minute in loading. After that it says Message sent successfully, but message not get delivered.
I had checked sendmail it is running... I also checked spam folder of destination email..
Server :: Installing VNC In Cent OS 5 / RHEL 5?
Feb 18, 2011Installing VNC in Cent OS 5 / RHEL 5? Check the below link... [URL]
View 1 Replies View RelatedNetworking :: Dhcp Server With Two Subnets?
Mar 17, 2010I'm trying to build a linux(fedora 12) dhcpd server(and gateway), that have 3 network cards(eth0 have with public ip, eth1 192.168.2.1 class and eth3 with 192.168.3.1 class).
Because I have just a switch, I want to put both cables(from eth1, eth2) in the switch. Every client has 2 network card(eth0, eth1). My question is, is there any way to conf eth0 to take from server ip from 192.168.2.1 class, and eth1 from 192.168.3.1? The internet will work only on eth0.
my dhcpd.conf for now looks like this:
subnet 192.168.2.0 netmask 255.255.255.0 {
option subnet-mask 255.255.255.0;
option routers 192.168.2.1;
[Code]....
Server :: Sendmail Unable To Start In Cent OS 4.6
Apr 9, 2010When i issue the command "service sendmail start", it just shows me "starting sendmail..." and waits forever. please have some point on it.
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May 7, 2009i am running cent 5.1 and would like to upgrade httpd v.2.2.3 to the latest 2.2.11 version provided by apache to resolve some ajp errors i am experiencing.
I searched but did not find any rpms for cent nor did i find any instructions on how to do this.
CentOS 5 :: Have A Cent 5.5 Server That Only Have Remote Access?
Sep 28, 2010I have a cent 5.5 server that I only have remote access to. I was wondering if there was a way to view potential updates before I issue the yum update command. I know that there is a notification in X that you can click on and will show you the updates before you actually perform the operation.
View 2 Replies View RelatedFedora Networking :: Installing Box As DHCP Server?
Jun 19, 2011We have a network of 20 boxes and the router dealt with DHCP, but I'm planning to assign the DHCP task to the linux box. Any heads up? eth card configuration, network topology... etc.?
View 8 Replies View RelatedUbuntu Networking :: Can't Use Static Ip On Dhcp Server
Aug 17, 2010I have 2 Ethernet connections, one (eth0) for the internet which gets set with dhcp, and one (eth1) for my internal network on which I have dhcp3-server running. I set eth1 to use static IP in interfaces, but every time I reset the network, it is fine for a couple of minutes, and switches over do being served by my own dhcp server on the same machine. (the interfaces file clearly says "iface eth1 inet static")
View 7 Replies View RelatedUbuntu Networking :: Server 8.04 - Installer Cannot See A DHCP ?
Dec 13, 2010I reinstalled Ubuntu server, now, as always I have to start off with 8.04 then upgrade to 10.04, and I've never had a problem with this before on this machine or any other for that matter. The problem is, this time I have installed and Ubuntu installer cannot see a DHCP, I go a head and install anyway and fire up Ubuntu and there is no internet access, I have two network cards plugged in, when I type in ifconfig it shows only lo and no network cards, and yet when I check lspci ot shows both network cards are there and when either are plugger in it shows connection on both the connector at the stack end and on the router.
View 5 Replies View RelatedUbuntu Networking :: Setup A Dhcp Server
May 6, 2011i have a homework where i have to set up a dhcp server on linux. I am using ubuntu. I tried following: [URL] However after running "sudo apt-get install dhcp3-server" the file "/etc/default/dhcp3-server" does not appear.
View 9 Replies View RelatedNetworking :: Configure To Use A Specific DHCP Server?
Jan 24, 2010This is probably an odd request, but figured I'd ask in case someone knew. We have a lab that has the IP range 172.10.0.0/16 (255.255.0.0). The lab gateway/DHCP assigns an IP in the range of 172.10.0.2-172.10.0.254. I want to set up my own DHCP server on a specific range, for example 172.10.10.1-172.10.10.254. I create a new host fine, but since it's set for DHCP, it uses the DHCP server at 172.10.0.1. Is there a way to force it to use a different DHCP server on the client side? I realize that I can work around this with exclusions on the 172.10.0.1 DHCP server, or use iptables to deny DHCP requests to specific MACs, but wanted to know if there was an (easier?) way to configure the client to use the 172.10.10.1 DHCP server instead of the 172.10.0.1 server?
View 1 Replies View RelatedNetworking :: DHCP Server Auto-detect
Apr 1, 2010I have a scenario where a Debian (in this case) device will be connected to an existing LAN.What I then want said box to do, is to query the LAN to see if there is an existing DHCP server present. If there isn't one - then simply use the Debian box as the DHCP server (which works fine atm).If there is an existing one - I need the Debian box to be able to turn off it's own internal one and get it's details from the existing server (ie. change from server to client).
These action will need to be sat in the background as well - just in case another DHCP server appears on the LAN after this box does. Don't shoot me for saying it - but I know Windoze server does this. Is there a 'script/util' that anyone knows of (I am trying to do this auto-magically)?
Networking :: Dhcp Server On Network Drive
Jan 15, 2010On my network drive web control panel I have got such an option:What would a dhcp server do on a network hard disk?
View 5 Replies View RelatedNetworking :: How A Computer Determine Dhcp Server
Dec 7, 2010I got a machine with RedHat Enterprise Linux 5 installed. I set the ifcfg-eth0 as following:
Code:
DEVICE=eth0
BOOTPROTO=dhcp
ONBOOT=yes
TYPE=Ethernet
when the machine rebooted, eth0 has the ip address 192.168.24.234. But if executing 'dhclient', eth0 will get the ip address 10.200.34.208, which is my expected ip address. I'm not quite familiar with networking things. I don't know what's going on there. Why should I need to execute 'dhclient' to obtain the expected ip address? Is there any way to obtain the ip address 10.200.34.208 right after host boot?
Networking :: Configure Dhcp Server On Centos?
Feb 9, 2010how to configure DHCP server on centos linux and how to configure FTP server on centos linux
View 2 Replies View RelatedNetworking :: Display DNS & DGW Provided By DHCP Server ?
May 4, 2011If I use static TCP configuration, (my Linux is Red Hat, but SuSE is quite similar) I define DNS's in file "/etc/resolv.conf" and Default GateWay in file
"/etc/sysconfig/network" (/etc/sysconfig/network/routes undef SuSE).
So, when I want to display those values, I just display the contents of the file. But, if my TCP configuration uses DHCP server ... I dont know the command to display those values. PD.- in straight : I need a command to display the DNS's in effect on a TCP/IP configuration that uses a DHCP server. Also, a command to display Default Gateway would be welcome.
Networking :: Setup DHCP Server In Redhat 6?
Jul 20, 2011How to set up DHCP server in Redhat Linux 6
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May 7, 2010I have installed Centos 5 on a virtual machine (esx4i). I set it to obtain an IP address from the DHCP sever, which is a broadband router, it has been given an IP address of 10.10.11.159 the router is 10.10.11.1 but I can't ping the router and I can't get any access to the network! I have a SCO Openserver server on the same physical box and it works fine so I know the network card & cable is ok.
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Oct 31, 2010I can configure openldap on suselinux or Cent OS but i need to a simple script that can doing it automatically (in simplest case).
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Jan 7, 2011I work at a small animation studio with a server box running Cent OS. We have no IT guy... I happen to know a little bit of programming so I got assigned to look after this server box. I'm still in the process of learning basic linux using VMware at home at themoment.There are few things requested from me that are really beyond my knowledge at this time and I really need some advise or pointer to get started.Current set up- We have 2 servers. A windows server 2008 and a Cent OS. They don't work together... They are only acting like a central "hard drives" so to speak.
- Cent OS was a new addition to our team. It was recently requested by our client. They set up RSync for us to get files from over sea and they want our file structure to match theirs.- We have 15 work stations. Not set as domain yet. We boot into Windows 7 for projects stored on windows server, and boot into Fedora for projects stored on Cent OS.What I was asked to do- Centralize user accounts. My boss wants both windows and fedora to log in using the same account. What would be the best approach to do this? We want the accounts to be managed via the Cent OS box. Permission to access hard drives on the server should be controlled as well.- Maximize Rsync. This one is really beyond my knowledge. The Rsync process from our clients sometimes doesn't go through. They want to make sure the process works as smooth as possible.