Networking :: Host Not Responding To DHCP Request?
May 18, 2009
I am running a 2 NIC system with the routing table for eth0 allows user access to the internet,etc. and eth1 routes to another private network (192.168.x.x). eth1 is configured to handle DHCP requests.When a device connected via eth1 boots, it requests an IP from the DHCP server. Using tcpdump, eth1 is receiving the request but is not offering a lease.dhcp.conf seems to be configuring the DHCP service correctly. and dhcpd is running.The host is running Red Hat Enterprise Linux (Server Edition) 5.1. Perhaps I need to modify fire-wall rules (or disable them on eth1 altogether)?
View 2 Replies
ADVERTISEMENT
Apr 26, 2010
Google is full of users which cannot get a DHCP address So no matter what search term I use, I only see solutions which do not apply to this problem. I am running Debian Squeeze on a netbook eeePC 1001P I have a wireless interface and a wired interface defined in /etc/network/interfaces:
Code:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
[code]....
Both interfaces WORK! When I have plugged in a cable, eth0 acquires and gets an IP, when I am in reach of the WiFi, wlan0 gets an IP address. Now when I want to use only wireless, and I have no LAN connected, this is what happens at boot:
Code:
ADDRCONF(NETDEV_UP): eth0: link is not ready
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 5
[code]....
This is fine, however it takes forever (I think 60 seconds) before DHCP decides to time out. That is awkward. This is my wife's computer and I cannot tell her to intervene manually when she is either in Wifi range or on the LAN. Why is dhclient called when it is detected that eth0 is not ready? How can I disable acquiring a DHCP address on an interface which is not ready? when a link is not ready, acquiring a DHCP address is skipped. How can I configure that? I have looked thru the ifup scripts, but nothing. Where do I see what is happening when the interface is auto eth0?
View 3 Replies
View Related
Jan 7, 2009
I'm attempting to set up a server for performing diskless boots here. I'm using Gentoo 2008, and have followed the instructions here:
[URL]
I've gotten to the end of the basic DHCP setup, and I can not get the server to issue addresses. I've confirmed dhcpd loads up OK, and is running in top.
Here's the contents of /etc/dhcp/dhcpd:
Code:
# Disable dynamic DNS
ddns-update-style none;
# Assume one default gateway for IP traffic will do
[Code]....
View 6 Replies
View Related
Dec 12, 2010
Running 2.6.29-gentoo-r1 on a Sun Ultrasparc 10 with a Sun Happy Meal on eth0 connected directly to my cable modem. Intermittently, with a frequency between a few hours and a few days, I lose internet connectivity. Running ifconfig eth0 indicates all is well and I have a valid IP address but I cannot even ping the cable modem's management address; pings to 127.0.0.1 and eth0's IP address do get a reply but no other address I've tried does. I can 'fix' the problem by issuing
Code:
If I check the CM logs, it appears that it has rebooted itself prior to the loss of connectivity. The strange thing is that the incoming traffic doesn't seem to be affected by this, my PSAD log is full of incoming scans even during the periods when I can't connect to the net. I suspect this is an ISP problem (they own the CM);
View 2 Replies
View Related
Jan 13, 2010
I am an 'experienced perpetual newbie' using Ubuntu 9.04. I know a little about quite a few things but nothing past intermediate knowledge so:I am trying to set up a simple LAN between 'rhino' (192.168.1.102) and 'polly-laptop' (192.168.1.101). My router address is 192.168.1.1
From polly-laptop:
sudo mount rhino:/home /media/rhinohome
polly-laptop can access rhino:/home fine.
[code]....
View 8 Replies
View Related
Jul 8, 2010
Server
Distro: Debian Testing (Squeeze)
FreeSWITCH ver.: 1.0.6
Client (Dual-Boot Setup) Problem: Both Windows Vista Ultimate 64-Bit and Ubuntu 10.04 LTS versions of Ekiga, including SFLphone in Ubuntu 10.04 seems to be ignored by FreeSWITCH. FreeSWITCH fails to register. In the client side, the Windows firewall gets turned off for testing while everything in iptables under Ubuntu has everything set to accept in the filter section. In the server side, the firewall configuration is quite basic.eth0: Cable Modem plugged in via USB cable eth1: nVidia Gigabit that connects to my 1Gbit switch
[Code]....
View 2 Replies
View Related
Jan 22, 2010
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:
View 1 Replies
View Related
May 13, 2011
Is there a way trigger a shell script after my DHCP server successfully gives out, either a specific IP address or to a specific MAC address.I have two Xbox360's in my house that both receive IP address via DHCP reservations from the Ubuntu server.I have come to accept that without having two public IP addresses getting both to have an open NAT will be very difficult. I have decided that I am OK with only one being able to have an Open NAT at a time, but I want to change the firewall rules according to which Xbox 360 turned on first. This way I can move between level in my house and play online without having to modify rules manually.
View 3 Replies
View Related
Jan 22, 2011
I'm having some basic doubt! Consider 5 virtual domains has configured under a same server. I mean 5 different domains under same IP. Eg. mydomain1.com and mydomain2.com have IP 208.27.1.89. So when web browser request for mydomain1.com name server return IP address 208.27.1.89. Then browser contact IP 208.27.1.89 on port 80. Here comes my question how does apache know that the browser is looking for mydomain1.com not mydomain2.com. How apache differentiate the request for it's virtual hosts? By the way, what is a virtualhost ?
View 1 Replies
View Related
Apr 25, 2011
In the sys-log from server there a lot of message like this: Code: Apr 25 10:38:45 server portmap[2569]: connect from 192.168.1.3 to getport(nfs): request from unauthorized host Apr 25 10:38:46 server portmap[2570]: connect from 192.168.1.3 to getport(nfs): request from unauthorized host 192.168.1.3 is a client that want to boot from netwrok using PXE and NFS. However it doesn't boot and enters (initramfs) prompt. Seems that the server deny the connection from client.
View 5 Replies
View Related
Jun 10, 2011
I have proxy running. I have seen LAN machines sending packets by iftop -P -F 192.168.10./24
[Code]....
How do i set my iptables so that I can only send and recieve http,smtp,ssh,dns,dhcp request in and out of the proxy
[Code]...
View 3 Replies
View Related
Jan 16, 2011
I want to configure my DHCP Server on debian "router" so that this DHCP Server could give 1 "static" ip to 1 of my host (so that this host receive always the same IP address from DHCP Server)
View 2 Replies
View Related
Dec 21, 2010
I have setup a few machines within my house. The Debian Squeeze machines do not provide a host name in the DHCP client list on my router. Strangely, my Ubuntu, Android, and Blackberry machines do show host names. I have noticed the same behavior when wirelessly tethering my Debian laptop to my Android phone (which also uses DHCP). Is there something I need to enable to have the name show up on the router?
View 14 Replies
View Related
Mar 19, 2010
I am trying to enable DHCP so that it will give out IP's to some XP boxes when they boot. I have had success doing it dynamically, but not statically using the host declaration.
host xpTest {
hardware ethernet 00:50:56:2A:3B:00;
fixed-address 192.168.100.2;
}
My question is, what should the subnet declaration be if I only want to hand out static IP's like this? Also, the host is the same name that is specified in /etc/hosts correct?
View 3 Replies
View Related
Jul 7, 2009
What I am trying to do is log IP Address, MAC Address and the host name for records. So I can have a record of what PC got which IP address and when they got it. So far my search has yielded no results. It would not be that big of a deal as I could always look at the dhcp file, but it is generated dynamically (3rd party application using RADIUS and each user gets a host).
subnet 208.x.x.0 netmask 255.255.255.0 {
option routers 208.x.x.1;
option subnet-mask 255.255.255.0;
[code]....
View 6 Replies
View Related
Oct 22, 2010
Back 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.
View 6 Replies
View Related
Jul 1, 2010
Back 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.
View 2 Replies
View Related
Mar 25, 2010
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?
View 2 Replies
View Related
Feb 11, 2011
I have several hosts running either TinyCore or Oracle Enterprise Linux that are using DHCP to get their IP addresses and other network configuration.I'd like to use DHCP to pass in some other information, but I don't know how to get DHCP options, including custom options, in a CLI script.
View 2 Replies
View Related
Mar 8, 2010
Currently 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
View 2 Replies
View Related
Jun 25, 2010
how to redirect all client http request to https request in squid
View 1 Replies
View Related
Mar 4, 2010
I am working on a cluster for a molecular dynamics class and I have to edit my FORTRAN code (only the newest and best for me!). In order to get through to the cluster I have to ssh in. The network on which the cluster resides is behind a firewall, so I have to ssh through the firewall into the network first.
this is fine, I can login and move files and folders as needed, including sftp-ing into host 1, then into the cluster so I can transfer files from cluster to host and then host to me. This gets rather tiresome, so it would be nice to edit the files in place.
The problem is that when I access my code with emacs it launches the emacs client on Host 1, with no mouse support. I know the purists will howl about how I should be using keyboard shortcuts, but I am a chemist and not a programmer, so the mouse is very nice for me. Is there any way I can perhaps mount the cluster using sshfs so that when I open my code it launches a local instance of emacs? Sorry if this is the wrong forum, but I thought it was network related.
View 3 Replies
View Related
Oct 12, 2010
I got a bunch of machines (~10) that I share with my co-workers. I have appropriate .ssh file(s) set up so I don't get prompt for password when I try to ssh.Currently I ssh into these hosts and then do a top to check the load before I start using the machine. Because I don't want to be on a busy host.Can someone show me how to write a script that find a least-busy host given a list of hosts to check? (hardcoded is fine)
View 1 Replies
View Related
Jan 27, 2009
The internal network is behind nat done by the PC Router.The TP Link is recieving wireless signal from outdoors and it has switching and basic routing capabilities. I'm using the PC router for better routing options.PC Router (or R for short) is a triple-booting machine - Linux, FreeBSD and Windows. It has two lan cards - external (ext_if) - 100Mbps Realtek 8139 and internal (int_if) - 1Gbps integrated Realtek 8169.The problem is that all traffic from R to the network is slow - about 5-20K, while the traffic in the oppoiste direction is all right - about 10MB that is fine for 100Mbps cables, NICs and switches. The problem persist no matter the OS the pc R is running.I've tried some debugging on the situation as follows:
- put another PC at the place of R - everything is fine. That exclude the possibility of damaged cables, RJ-45s, switches and etc.
- connected both of the NICs to the Internet while the internal network is being disconnected and they both work fine (no delays)
- traffic shaping is not running
- there is nothing in firewalls except NATing the internal network (and it is working fine). Actually these firewall rules have been operational for more than months and everything was fine untill a week or two ago.
- changed the internal NIC with another
- connected the internal network directly to the TP and all of the PCs are getting good network performance. Then connected the R machine to the TP as well and there was good performance between the internal network PCs and R.
- R has good performance to the TP. In fact everything has good performance directly to the TP (when not connecting trough R).
- the problem persist only between R and machines from the internal network.
View 2 Replies
View Related
May 19, 2010
So here's the setup:
Ubuntu 10.04 host inbound port 22 open
FreeBSD 8.0 host no inbound ports open
Both hosts are running sshd currently. What would you do for the Ubuntu host to be able to ssh to the FreeBSD host? A tunnel?
View 6 Replies
View Related
Aug 29, 2010
I have installed Net-SNMP.It is binded to port udp 161I start it with the command: snmpd -Lo
when I do snmpget -v 1 -c public localhost system.sysObjectID.0on the same machine the snmpd is running on- I get a respond SNMPv2-MIB::sysObjectID.0 = OID: ccitt.1when I send same request from another machine (using SNMPc program) - I see no reaction.I used "wireshark" to monitor packets, and I see the requests sent from the other machine. I also see them get to the first machine.
View 1 Replies
View Related
Sep 29, 2010
I have been using 10.4 as a Linux NFS server to share it's storage with a number of Mac computers we use in the office. All the Macs are configured to connect to the Linux server using the mount_nfs command in terminal.I have been using this method to transfer files to and from the Linux server for a while. Today, I installed a number of standard Ubuntu updates / security patches per the standard GUI update tool.
Now, I'm getting "nfs server 192.x.x.x:/media/video: lockd not responding" error messages. I have not seen this error before, and I haven't changed anything else about the configuration of the Linux server or the Macs with the exception of the installation of the security patches.
View 1 Replies
View Related
Feb 12, 2011
i can only browse some websites with my lucid(10.04), others not responding at all. ping working well but telnet (website) 80 returns nothing for some and works for others!!! i have no problem with my win7. any idea? a virus in my ubuntu? i just used ubuntu software center and sourceforge.jp for my sources and softwares. i checked for iptables rules but there is no block.
View 1 Replies
View Related
Dec 14, 2009
I am getting an var log error while mounting remote file system to the client side as:- Kernel:NFS: Server 10.47.152.70 is not responding, still trying.
The issue is client side machine is getting hang, after i mount the file system.
I have exported the file system as ext3 at the server side using Veritas Cluster. And importing it on the client side by including the shared directory in fstab.
View 2 Replies
View Related
Mar 11, 2011
I have problem with qmail. From today I can't connect to my server, when I login via ssh on serwe and check
Code:
telnet localhost 110
I can connect but when I try
[code]....
View 3 Replies
View Related
