I want to provide dhcp in different NIC which are eth3 and eth2. eth2 has the IP address of 192.168.3.1 and eth3 has the IP address of 192.168.4.1. I want to provide dhcp to 192.168.3.0network and also for 192.168.4.0 network.All these are done in ubuntu server.
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Ubuntu LTS 8.04 + DHCP. Works fine except for fixed addresses. I mean all devices which need to get fixed IP according to their MACs don't get them and keep to receive random IPs from the range (although almost everytime all machines receive the same IP they got from DHCP for the first time).
The following config was created by Webmin interface.
At the one of the ubuntu forums i was advised to carry host description out of the subnet description.
Ubuntu LTS 8.04 + DHCP. Works fine except for fixed addresses. I mean all devices which need to get fixed IP according to their MACs don't get them and keep to receive random IPs from the range (almost everytime all machines receive the same IP they got from DHCP for the first time).
View 2 Replies View RelatedI recently bought a used Server (FSC RX200 S4) and set it up running Debian 7. Being used to Ubuntu, that was no big deal. It works as it should out of the box. This magic computing machine has four Network cards (eth0 - eth3). Now, I want to set it up as a multi-purpose server. On the one hand, it shall provide a Apache2 webserve, a SQL Server, a File/Streaming Server and so on. I have no problems setting up these.
On the other hand, it should work as a DHCP server in my local lan with some PCs and a printer/scanner. Until now, my cheap router did that job including to connecting me to the internet. Since I can't really set up a proper firewall with that box, I want to use my server for that.
Thats's my desired setup I want to achieve:
[] Router provides internet connection to Server
--> cable goes into eth0
[] Server therefore has a internet connection
--> Some internal magic routes the internet from eth0 to eth1 (preferably as a iptables setup) and does the Firwall & DHCP Service
--> cable goes from eth1 to a switch
--> switch connects the PCs and printer
[] PCs have internet and I can use the printer
So far so good, here's what I've come up with. I installed dnsmasq and isc-dhcp-server. I got some config files for both. I got a script to set up my iptables
Iptables script:
Code: Select all#!/bin/sh
#
# rc.firewall
# firewall with iptables ... stronger version
#
FWVER=0.88s
echo -e "
Loading STRONGER rc.firewall - version $FWVER..
[CODE].....
When starting up the services, I don't see any errors. Still, it doesn't work. My Server loses its internet connection and the PCs connected to the network are unreachable.
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.
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.
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?
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 RelatedIn my company, they provide linux machines which has a 4 yr old Gentoo linux. Also the OS is loaded through Yukon PXE/netboot environment, and the users directory is mounted from an network location. Also they dont provide root access in these machines.
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I have a telephone connection of 1 mega internet modem huawei mt 880 SmartAX my desktop computer is connected via an ADSL PPPoE.I use Ubuntu 10.04 in Spanish and want to know how to connect a WiFi router TP-LINK TL- wr942nd to provide wireless Internet to other 2 PC, a desktop with a plaquet wireles G CNet CWP-854 and 500 series notebook olivetti olibook. The issue is that when I connect the router I can not even go online and do not know how to operate the network, I can not even connect the desktop to my internet provider
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View 1 Replies View RelatedI have a new Acer Aspire One, model D250-1958. It uses the Atheros AR928X. I've tried Ubuntu Netbook Remix 9.10 and Ubuntu Netbook Edition 10.04, as well as the conventional Ubuntu. Everything works beautifully, except no wireless. The netbook picks up the signal, but when I provide the Key it fails to connect, and eventually prompts me for the key again.
I've tried to research this on my own, but haven't found a solution. In particular, the solution reported by narnie for his Acer Aspire One D250-1584, <HERE>, didn't work for me.
I'd really like to get this working. The netbook will be much less useful if it can't make use of our wireless router.
I am setting up a class using a vmWare ESX server. Because of security proceedures, the students are not allowed to connect directly to the internet. Because of file space, the are severated on 3 servers. I am trying to set up a server that connects to the internet and all 3 subnets that the students are on.
I have configure 4 virtual NICs 1 with DHCP connected to the internet. The other 3 goes to each student network. I can get 2 working at a time. 1 using the DHCP and 1 of the other networks. It seems to be order dependent. On the main server I can ping the local address. When I ping the students systems, I can reach 1 but not the other 2. I get a host unreachable message.
Is there a limitation to 2 NICS. If not, is there any magic incantation to run the 4 nics?
I have a small pc running fedora 8 with iptables and 2 network cards for routing/firewall and secondary DNS.For some time I've been alerted by the network guys that this machine was generating some alerts. The real network IP address keeps being assigned to the other interface, intended for LAN only (10.0.0.1/24).I've already changed the PC, installed a more recent operating system, replaced the 2 network cards and the problem persists. I have another pc running the same services (except DNS) in a very simillar way and no alert logs from that one.onder if it is some configuration issue on my startup firewall script.I've also installed arpwatch and I could confirm this IP and physical address issue:
Arpwatch output:
hostname: my.host.name
ip address: my.ip.address
[code]....
I am writing a new lightweight Linux distibution mainly for educational purposes. I have a problem; it won't find any ethernet cards. I have tried enabling several things in the kernel config. What I would really like to know is how to enable some generic ethernet drivers and therefore networking. I would like to avoid having to use modules. I'm using kernel version 2.6.35.1.
View 9 Replies View Relatedwe are using Red hat enterprise 5.4 for our internet connection with following ip's
eth0: 192.168.1.2 (local lan)
eth1: 114.143.28.240 (static ip address for 1st isp)
eth2: 192.168.100.149 (2nd isp modem connected with lan cable)
first isp i.e tata internet connected to the internet and working very well
now i want 2nd isp to work when the first isp goes down, i had configured all dns in the resolve.conf and squid.conf, when i switch off the 1st isp for checking that failover is working or not i cannot get internet packets from the second isp.
I have two NIC card that connect to different networks. code...
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View 1 Replies View RelatedSo I am looking to modify my network cards MTU (for some testing purposes), and I only know how to do it it Windows (via command prompt ping command with special flags) and not in Ubuntu.
Any easy way to figure out proper MTU numbers in Ubuntu?
I have two nic cards installed in a Lucid LTS server.
eth0 is static using
address 192.168.0.235
gateway 192.168.0.1
netmask 255.255.255.0
[Code]...
I have my Qwest DSL modem port forwarding port 80 to 192.168.3.235 however this doesn't seem to work if I have both cards running. If I remove the second card (eth1) and reconfigure eth0 to use 192.168.3.235 I can port forward into my webserver.
I'm running 10.04 64 bit, and the Intel PRO/Wireless 5100 AGN does not work with n routers. I'd like to either upgrade the card, or buy a usb adapter, but I can't figure out which cards will work. I've searched[URL].. which lists supported wifi cards, but most of the info on that page is not relevant to lucid, and hasn't been updated at all this year. I saw elsewhere that any card with the atheros chipset will work, but what cards have this? Will all of them with this chipset work?
View 3 Replies View RelatedGot 4 onbards nics and would like to bond them into a single 4GB pipe. It is running a number of VM's. I can set up a link in my switch but I am stumped on ubuntu side. I think I have to make a file with entries but not sure where or how.
View 2 Replies View RelatedI'm looking for a cheap and stable wifi card that will work with Ubuntu 11.04. My Linksys WMP300N is creating a conflict with the native Broadcom driver (causing the system to freeze after light network traffic) and ndiswrappper isn't working for 64 bit Ubuntu.
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View 2 Replies View RelatedI have installed CentOs 5.4 for Snort sensor , on the location where i intend to place the Snort sensor to listen for internal firewall leg (LAN) the switch doesn't support port mirror so i would like to create with 2 nic's bridge and pass trough the firewall internal leg my question how do i set such configuration.
View 2 Replies View RelatedI have installed slackware 13.1 64-bit version and can not recognize network cards.I'm with laptop acer aspire 7540g.Wireless card is atheros ar5b93.Ethernet card is Broadcom NetLink � Gigabit Ethernet.
View 16 Replies View RelatedI just installed Fedora 13 on my desktop computer and ran into the same problems I did when I tried to install which was i could connect to a network but couldn't access the internet. I decided to install Fedora 14 since I already installed it on my laptop. I'm still running into the same issue, I can connect to my network but cannot connect to the internet using my PCI NIC or onboard NIC. Networking is enabled and I'm getting a IP address from my router. I ran "lspci" and it shows me both network cards which, please correct me if I'm wrong, makes me think that the drivers are installed.
I'm also curious if the VNC client/server could be used through a WAN. I would like to remote into my computer at home when I'm not there and see the gui. I had SSH installed at one point but it was just text. If there is better program please let me know. why I would have Services on my laptop but not on my desktop? Both computers are running the same version. Both cards are enabled and set to connect automatically. I can get a IP with both NICs. I only have one plugged in at a time.
Does anyone know what chipset is used in the HQRP 802.11n PCI mini cards (not express)?
[URL]
I'm looking for a 2 antenna card that does 11N for an older Dell laptop that use mini pci. This is the only one I found, but the chipset is a mystery, and I need to know it before buying it.
Had a hard drive fail this week, and I am going to order a new one. I am using $150 dollars in Best Buy gift certificates. Well seeing as how I have some left over I would like to get a usb wireless adapter that would work out of the box (preferably usb although I could always get an internal). All Best Buy has are wireless N cards and I was wondering if anyone knows if any Wireless N USB cards work out of the box without downloading firmware or NDISwrapper.
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