I'm trying to get dhcpd to use a specific IP address as the source address for responses it uses an IP address for. I coded "local-address 172.30.0.4" in the config file. For some responses it uses this address. For some other responses it does not. In those cases it uses the IP address that is the first on the interface. Is there another configuration I should be using, instead?
View 2 RepliesHow to find IP address of computers in LAN served by simple DHCPd (in ADSL modem - without IP reservations/MAC address).
So is in Ubuntu something like on-fly name resolution in Windows ? Without running DNS server with some kind of DynDNS ?
e.g.
My comp has hostname "GoGo" but I get random IP address from DHCP.
How can other PC on same LAN resolve my changing IP address ?
I hv Cent OS 5.3 installed as server. I hv a network of approx 100 desktops and laptops. For a security purpose i want to block certain laptops from gaining a the network access using dhcp. Can we block the ip address leasing if a specific MAC address request for a ip lease?
View 7 Replies View RelatedIm trying to setup dhcpd to put certain systems witch have mac address starting with 08:00:* in a certain ip class. How can this be done?So any system with mac address starting with 08:00 to get an ip from this range 192.168.12.2-192.168.12.99.
View 11 Replies View Relatedmy network expertise is tenuous at best. This started because one computer on my network is having trouble updating Google Toolbar information. This is a laptop which joins other wifi networks outside of the house.
Code:
BROKEN:~$ ping toolbar.google.com
PING toolbar.google.com (208.68.139.89) 56(84) bytes of data.
[code]....
I updated Kubuntu from 8.10 to 9.04. After the update, I saw a problem with VPN connections. I am using an mac pro with 2 ethernet ports. Only one of them is connected to switch. I am using a static IP in my local network. The problem is that I lose dns information after connecting and disconnecting to a VPN by KVpns.As I am using static ip, I entered my dns server to resolv.conf file with "nameserver 192.168.128.4". My interfaces file is as follows:
auto lo
iface lo inet loopback
address 127.0.0.1
[code]....
Something is definitely odd here:Quote:
[rena@mercury:~ 500]
$ hostname
mercury
[code]....
I have written C code to read data from the network using raw socket. I am printing out source/destination ip addresses and ports for packets I am interested in. For most part it decodes Source IP address correctly but sometimes the last part of the address is not correct. The destination ip address is always decoded correctly.
Here is the snippet of code:
Code:
struct sockaddr_in SenderAddr,Source,Dest;
socklen_t SenderLen = sizeof(SenderAddr);
struct iphdr *IpHdr;
struct udphdr *UdpHdr;
[Code]......
Is there way that you can specify the source address to use when mounting a remote share? I'm trying to test an application, and I need to be able to script a job that connects to a remote SMB server using different local IP addresses on the system. It would have 1 main address, and several aliases in the same subnet. The script would mount the remote server, transfer a file, then unmount, change IP, and repeat.
View 2 Replies View RelatedHere is a glimpse of my IPTABLES
http://pastebin.com/WvHAC46A
I see in the column of sources the addresses being resolved to domain names is there a way I can stop this?
I've found a lot of pages of how to fix the issue on older releases of dhcpd and ubuntu.
#>dhcpd
#> ...
#> Can't create PID file /var/run/dhcpd.pid: Permission denied.
I have tried creating the file and giving it permissions to be accessed, but that isn't solving the issue. I tried to go through some of the older fixes, and one was really close to working but lacked the same folders as I have.
EDIT: one solution that worked was to use ln -s /var/run/dhcp3-server/dhcpd.pid /var/run/dhcpd.pid dhcpd3 -cf /etc/dhcp3/dhcpd.conf at0
I have a weird problem. My system has two network adapters, one with a 192.x address and one with a 10.x address. I connect to the Internet over a proxy that also has one 192.x address and one 10.x address. The name of this proxy is added to /etc/hosts with the 10.x address. Additionally, the network settings for the 10.x adapter include the proxy as gateway. The 192.x adapter has no gateway. If I ping the proxy, it is correctly resolved over the 10.x address.All my applications are set toirectly connect to the Internet".Some apps (the "good" ones) use the 10.x address to connect to the proxy, while some others (e.g. Firefox, the "bad" ones) use the 192.x address. The latter fail to connect to the Internet because the proxy is configured to let traffic through the 10.x adapter only
View 10 Replies View RelatedI installed the Centos 5.5 and after the Xen. After I put a virtual machine named VM01.Initially it worked properly, I tried everything and it worked.When rebooted, I had problems with the network.I have two network cards eth0 and eth1, but eth1 does not have any ip and I use only eth0.The error that appears is:
vif0.0: received packet with own address the source address
Hey guys. I have a client computer PXE booting from my host computer and it is supposed to give the client the ip address 172.16.0.100 however instead it gives it the ip address 172.16.0.208.
I have this set up working with two other computers and there is no noticeable difference other than mac addresses for the network card.
Here is an extract from my '/etc/dhcp3/dhcpd.conf' file...
ddns-update-style-none;
option domain-name "example.org";
default-lease-time 600;
max-lease-time 7200;
[Code]....
I have quadruple checked the mac address of the client and it is definitely "00:07:E9:32:16:81" so why is it not giving it the IP address that I have specified?
I wrote/cobbled-together this nifty sendmail script to read some logs and take some disk stats. basically i'm reporting on rsnapshot. When I run it as
Code:
sudo /etc/rsnapshot/mailSta.sh
Everything works wonderful and the emails arrive as expected and fires off an email to two accounts at a remote server
I have an HP Pavilion A6750F with an AMD Phenom 9650 Quad Core. 8 GB memoryThe NIC is a REALTEC Semiconductor RLT8111/81688 PCI Express Gigabit Ethernet Controller.The actual MAC address for the NIC is 00:24:21:55:DE:40I have loaded CentOS 5.3 on this host three of four times in various configurations and patching levels.THE PROBLEM: The system identifies the NIC as having MAC FE:FF:FF:FF:FF:FF.When this happens, the network connectivity obviously stops working.It identifies everything else OK, just maps the wrong MAC.I'm no sure how to troubleshoot this problem. I tried rebooting a couple times and once that fixed it. Usually it does not. I reloaded (gasp) Windows Vista on it and it worked ok.This last time, I reloaded CentOS it hung on the bootup (ASK ??), I reset it, it rebooted and everything looks ok; for now.
The system says it is presently using driver r8169
I have setup a dhcpd server on my lan with the following option to reflect the static route to my private LAN.
dhcpd.conf
Code:
option static-routes 10.0.0.0 192.16.5.0
I've tested it on OpenSUSE, ArchLinux and even Windows dhcp clients and they've managed to pull the static route configuration. However, to my suprise on my ubuntu machines this doesn't seem to load. Is there anything that needs to be done on the client's side to get this to work?
How can I start dhcpd after Network manager has set up a new connected device. The reason being that dhcpd will not start when there is nothing connected to the network interface. Therefore I would like dhcpd to start after a new device is connected. Now I have found references if ifup-post but this does not relate to NM, is this correct?
View 5 Replies View RelatedHow to tell dhcpd to listen to ifcfg-bond0 ?
View 1 Replies View RelatedI'm having some trouble with getting my DHCP service up and running on my server. Below is my /etc/dhcpd.conf file, which I believe is the right file necessary to get this service up and running correctly. When I do service dhcpd restart it just show in red letter [Failed] next to it.
Code:
ddns-update-style interim;
ignore client-updates;
subnet 10.2.3.1 netmask 255.0.0.0 {
# --- default gateway
#option routers 10.2.1.1;
#option subnet-mask255.0.0.0;
#option nis-domain"domain.org";
#option domain-name"domain.org";
#option domain-name-servers10.7.8.1;
option time-offset-18000;# Eastern Standard Time
#option ntp-servers192.168.1.1;
#option netbios-name-servers192.168.1.1;
# --- Selects point-to-point node (default is hybrid). Don't change this unless
# -- you understand Netbios very well
#option netbios-node-type 2;
range dynamic-bootp 10.2.3.2 10.2.3.254;
default-lease-time 21600;
max-lease-time 43200;
# we want the nameserver to appear at a fixed address
#host ns {
#next-server marvin.redhat.com;
#hardware ethernet 12:34:56:78:AB:CD;
#fixed-address 207.175.42.254; } }
I have a small bash/awk program that extracts the date/time/size of thousands of email headers. I'm trying to also extract the last "Received from:" string from these email headers which will give me the senders email server. on extracting the last occurrence of this string, and printing the information after it?
View 3 Replies View Relatedi have a big problem y have to make an alias for the eth0 interface, i made it with yast and my alias was eth0:1, first, if i try to shutdown the interface i cant it give an error and tell me that the interface dont exist and the second threat is if i can put a default gateway for this alias something like this in other distributions:
route add 128.26.6.11 gw 192.168.28.201 dev eth0:1
I have a router with ddwrt on it that runs a DHCP server. What I want to do is only allow people who have pre-determined MAC addresses to get an address to get on my network. That being said I have a VM set up as a DHCP Server. Since doing this I will be setting the dhcp settings on my router to be a forwarder to the VM. Is there a way to allow only static leases in the dhcpd.conf file? I do not just any computer on my network to get an address I want to base it on MAC addresses.
View 4 Replies View Relatedver: 9.10 how do I restart dhcp3 after changing dhcpd.conf?
View 3 Replies View RelatedDoes anyone know where I can find RHEL compatible rpms for Bind 9.7 and DHCPD 4.1?
View 1 Replies View RelatedQuote:
-A RH-Firewall-1-INPUT -s 10.12.0.0/16 -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
Ex- 10.12.0.0/16, 172.150.0.0/16, 192.168.20.0/24
How can we add multiple sources network address in the above INPUT chain?
Currently my OS is Ubuntu 9.04 Jaunty Jackalope Desktop OS and my web server is Apache2. I have a public address 60.x.y.z and my pc local address is 10.x.y.z. I have a web app in my Apache2 which currently run in localhost(10.x.y.z).
I would like to enable the web app so that it could be browse from outside. I know there maybe some port forwarding process and some commands involved in order to do that. But I have no idea on the steps to do that.
I am working on implementing a protocol on NS2.34 .I really need help to solve this problem . Actually , I don't now whether the problem is generated by the tcl code or the c++ code when I run the simulation, I get this result :
Code:
num_nodes is set 64
INITIALIZE THE LIST xListHead
34
45
channel.cc:sendUp - Calc highestAntennaZ_ and distCST_
highestAntennaZ_ = 1.5, distCST_ = 550.0
SORTING LISTS ...DONE!
code....
Consider the following program:
Code:
#include <stdio.h>
#include <stdint.h>
[code]...
I have a Suse 11.2 machine named "susepc" on a network with some other windows machines. From the Suse 11.2 machine, I try ping winpchere winpc is the name of a windows machine on the LAN but the name resolves to an odd ip address:PING winpc.HOMENET (72.215.225.9)he "HOMENET" is the correct name of the windows workgroup, but the ip address is completely wrong. My LAN is based on 10.20.x.x and the winpc ip address should be 10.20.0.100. I can "ping 10.20.0.100" and it works correctly.Some things:- DHCP server is on the router- pinging from winpc to susepc works perfectly ("ping susepc" resolves to the correct IP address 10.20.0.101 and the pings respond)- "net view" on winpc lists the susepc - SAMBA is installed on susepc- the Netbios name is set to susepc- I have a shared folder on susepc that I can see, create files in, etc. on winpc with no problems.- IPV6 is disabled on susepc- I have tried setting up susepc as a WINS server (Wins Support)
- I have tried setting up susepc as a Local Network Browser