Debian Configuration :: VM Is Assigned IP By DHCP At Reconnect
Oct 1, 2015
I'm running jessie on virtualbox.
I set staticIP at /etc/network/interfaces.
When I stop/start vm(not restart), dhclient becomes up and ip is assigned by dhcp. Why?
yoshi@vbox:~$ uname -a
Linux vbox 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1 (2015-05-24) x86_64 GNU/Linux
yoshi@vbox:~$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
I have done a clean install of debian 8.2 (jessie) on a new PC. I am working through some of the issues that were not correctly installed. One of them is the wireless network. On startup, I have a wireless connection. At some point within the first 5-25 minutes of being logged in and doing computer stuff (there is no known action that leads to the reaction), the wireless disconnects from the network and will not reconnect. The network-manager-gnome shows three horizontal dots; the system settings> network shows all of the available networks, the strength of their signal, and the "connecting" circle spins. This behavior occurs with both WPA and insecure networks.
I have followed the guidelines for Debian>WiFi>HowToUse (https://wiki.debian.org/WiFi/HowToUse). Nothing appears amiss when following the Network-Manager>Gnome portion of the instructions. I was going to try the alternate WICD program, but one has to uninstall network-manager to use wicd and synaptic also wants to remove something called "gnome", too-- uninstalling a package with that name makes me uneasy. I have noticed that the installed versions of network-manager (0.9.10.0-7) and network-manager-gnome (0.9.10.0-2) don't exactly agree, but I doubt that that is significant.
root@fayalite:/home/agnewton# iwconfig eth0 no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:"Mineralogy" Mode:Managed Frequency:2.472 GHz Access Point: 64:E5:99:2C:A0:7E Bit Rate=150 Mb/s Tx-Power=20 dBm Retry short limit:7 RTS thr=2347 B Fragment thr:off Encryption key:off Power Management:off Link Quality=70/70 Signal level=-18 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
I'm running squeeze testing. I have noticed an issue with the way NetworkManager acts when the wireless connection is dropped. I believe it should automatically reconnect but it immediately puts up a dialog requesting me to enter the wifi password. This dialog stays indefinitely until I intervene and click "OK" (the password from the previous successful connection is still there). I would think that something as basic as wireless networking should not require 24 hour human interaction to stay connected. I have considered a cron job checking the network status and restarting it if necessary, but there is a configuration change or something else I can do to resolve this.
I would like to create several aliases to eth0, but have the addresses assigned by DHCP instead of being set to static IP's. Is this even possible? All the examples I've seen assign a static IP using the command: ifconfig eth0:0 192.168.1.11 up
I'm trying to tighten up my network a bit. I've given my dhcp server a list of static mac addresses and ip's for computers i know, and a very short range of dhcp addresses that are redirected to kittenwar.My dilemma is that if someone has my wireless network password, or an ethernet cable, they could set the ip address manually and gain access.how can i deny them this pleasure?im running dhcpd3, and iptables on a debian/lenny intel 2.4 box. dd-wrt is running in a linksys wrt54g and is handling the wireless security
I am just trying to get SSH working between 2 local machines on OpensSuse 11.4 boxes. I have the SSHD daemon running, the firewall is configured to allow SSH to pass, and I am using SSH's password authentication. However, my machines cannot see each other. Anytime I try to SSH, I get "Could not resolve hostname<hostname>: Name or service not known."
Of course, that leads me to believe I need an entry in my /etc/hosts file. However, I use DHCP, and therefore have a dynamic IP address. Therefore, my hosts names will only be good until the next IP renewal. How in the world do I configure SSH with a DHCP assigned address?
I'm trying to setup a DHCP server that serves several different VLANs, we have 5 in total. Our network is working correctly, with static IPs, we're able to ping across without any issues.
When I connect my debian box to an interface on VLAN5, statically assign an address in the correct range, it works. Similarly with all other VLANs.
To configure this box as a DHCP, I set one of the ports on the switch as trunk, connect that to the debian box to allow all VLAN traffic to reach my debian box.
I setup DHCP following the steps on [URL] ....
Then I configured different VLANs by following the steps on [URL] .....
However, with the vlans setup, I am unable to ping anything. This is essentially what I did.
Code: Select allSet the port on the switch to trunk with 802.1 encapsulation disable eth0 vconfig add eth0 5 # to add vlan 5 ifconfig eth0.5 192.168.5.254 netmask 255.255.255.0 up vconfig add eth0 5 # to add vlan 10 ifconfig eth0.5 192.168.10.254 netmask 255.255.255.0 up
I do not know why I am unable to get any connectivity through my VLAN interfaces.
I am connected to a network using any interface (eth0, eth1, or wlan0) that if my ip address was given out (dhcp) that my desktop responsiveness gets worse. Specifically the mouse has a sort of "sticky" feeling. I mean by that that I'm moving the physical mouse and the cursor is getting stuck here or there on the screen. It is extremely annoying. Here is my config file:
beethoven:~$ cat /etc/dhcp3/dhclient.conf # Configuration file for /sbin/dhclient, which is included in Debian's #dhcp3-client package. # # This is a sample configuration file for dhclient. See dhclient.conf's
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?
Setup a DNS/DHCP/Directory server on Debian? I would like to configure the things in Debian so that can join Linux and Windows(if possible as m not sure yet) clients to the directory server. Any links to setup both Forward and Reverse lookup zone in the environment.
I'm new to the forum and actually to Debian as well. Have been running Ubuntu for the past few years. Just setup a small Dell laptop to use as a Squeezebox and Print server. It's been up 6 days without a hitch as far as serving music to the squeezebox and printing. The problem is that it loses it's static IP, so as long as I look it up and change the radio Squeezebox and printer definitions around on the clients everything keeps working.
Does anyone have any ideas?If the connection drops for some reason and the system has to re-initialize the connection, shouldn't it use the /etc/network/interfaces file and get back to the static IP that it is configured for?If anyone has any ideas of why this could be happening or have a solution, I would really appreciate the help.
I just put a pfSense firewall inbetween my ADSL router and my LAN. It's configured to have a cachng DNS server and a DHCP server. Among other things. For reasons beyond this post the address range served by DHCP changed from 10.0.0.x to 192.168.1.x. The new DHCP server gives 192.168.1.1 as gateway and DNS server name and not the public IP addresses of our internet provider.
After reconnecting our client machines everything worked just fine on the win-xp boxes, but the Debian Squeeze servers and Ubuntu 10.4 clients all started to get network timeouts. If I ping public websites it works but browsing to the same servers fails. Other services like POP3 and IMAP also fails. All machines use WiFi to connect and the access point is the same as before.
What could it be that make the debian boxes fail? My laptop runs squeeze too and also fails. But when connecting to various other access points at hotels and such I do not get this problem.
Another weird thing is that the debian server running virtualbox cannot do things online but the virtual windows boxes running on this machine can. Weird! Where should I start looking? How is networking/dhcp clients on Debian different from Windows XP?
I'm running gnome desktop on squeeze system. When I boot my system seems to be using my internet modem as its dhcp server. The rest of the machines on my lan are correctly using my router for that purpose. As a result, what happens then is that my debian machine frequently gets a duplicate ip address assigned to it. I would like to specify to my debian computer that I want it to use the specific fixed ip address of my router for dhcp purposes.
I set up a dhcp server in the lan and assigned static ips to two computers, computer A and B, according to their mac address. Everything was running fine. But when I turned off computer A, connected computer C to the network, and assigned computer A's static ip to computer C without changing dhcp setting. Computer C was able to access the internet. When I turned on computer A, dhcp couldn't assign an ip address to it, and computer C showed an error message of ip conflict and failed to use internet. I wonder if dhcp server is able to prevent other computer from using the same static ip that is already assigned to a computer according to its mac address.
Alright, I edited "/etc/default/isc-dhcp-server" and set "eth0" as the only thing listed for interfaces. I also have the code below in "/etc/dhcp/dhcp3/dhcpd.conf" and I even copied it to "/etc/dhcp/dhcpd.conf" for good measure, and I can't get the DHCP server to start. As an intermediate to advanced user, I am under the high assumption that it is broken since everything in the docs has been set. I have googled for two days and cannot find a fix, so before I report it as a broken package, would somebody with more experience with the package chime in?
I hid my wireless setup because it contains my WiFi network info including key. This box is routing, doing DNS resolution, and firewalling just fine. I just cannot get the friggin' DHCP server to start no matter what I try.
Oh, and is it safe to delete "/etc/dhcp" or "/etc/dhcp3"? They appear to be duplicates of each other...
Up until very recently I've had a wired network, and at boot I'd see messages about DHCPREQUEST and DHCPOFFER and stuff as it set up the wired network.
Now I've just got wireless working instead, but it still tries to use DHCP on the no-longer-existing wired network. So it says "DHCPDISCOVER on eth0..." and waits for a bit, then again and waits again, and all the time the boot is waiting for a reply to its DHCP requests and it's not going to get one. It doesn't seem to do any harm, because once it's given up and proceeded with the boot then the wireless does seem to work fine, but I'd like to speed up the boot a little by cutting out this needless waiting. Has anyone got an idea how I can stop it? I tried in Preferences-Network connections and in Administration-Network, and in System Tools-Network tools, and also from the network icon in the task bar, but I can't find anything which lets me configure the wired network eth0 or disable it or disable the DHCP.
I have some beginner questions about DHCP, Avahi, and configuring a small home LAN.Suppose I have a dynamic IP address assigned by my ISP, which requires DHCP be enabled in my dsl modem/router/"firewall" [sic]. Suppose for simplicity I have just one PC behind the dsl modem.I think "enabling DHCP" in the modem/router means that a DHCP client runs on the router, which communicates with a DHCP server run by my ISP when I boot up a PC on my LAN. Is that guess correct? Can I get DHCP to assign a particular local IP, say 192.168.1.10 (which is not the one taken by the router--- for this discussion, let's say that is 192.168.1.0) to my PC each time I boot it up?
Now suppose I want to build a stand-alone firewall, so that my LAN will have the firewall and the first PC behind the modem, with the first PC virtually behind the firewall. By default, I think these will both have DHCP clients running which I need to configure properly. The firewall should also have a DHCP server which should control how local IP addresses are assigned, correct? I should try to arrange that the LAN has only DHCP server, only one NTP timeserver, only one DNS nameserver, correct?My first PC seems to have installed an autorun client called Avahi, which performs DNS multicast services and incorporates something called zeroconf which seems to have something to do with remote desktops, which I don't need and which is a potential security hazard. But it seems that Avahi is an intrinsic part of the KDE desktop and cannot be removed. Just want to be sure that Avahi can coexist comfortably with dhcp3-client, which is also installed on that PC. They perform different tasks, correct?If I can get the stand-alone firewall to work, I know I need to turn off the commercial firewall in the dslmodem/router/firewall device. Should I purchase a bridge and try to turn off the routing function also?
I have a home Debian server running, and i would like to set it up as a gateway. I have 2 networkcards in it. So internet comes from the modem and on the other card i want to setup a dhcp server and it has to share the internet. But i want it also to connect to a vpn and share the internet of the vpn.. Is that possible?
I installed the latest Debian on a computer to make a backup appliance. No GUI.When the computer starts, everything is okay. The DHCP client is running, the network interface have an address, fine.If I do a /etc/init.d/network restart (or stop + start), no more DHCP client. t is stopped when the interface is down. When the interface is up, I have to start it manually.1 - is it normal ?2 - isn't ifup's job to launch the dhcp client ?3 - can /etc/network/if-up.d be the right place to resolve this ?
I wanted to setup my server as a router/gateway just for educational purposes and also when it succeeded i will keep the gateway and place it on the front line right after my modem.
My current setup as it is now :
The GATEWAY/ROUTER will be doing the main work to act as a dhcp server and firewall.
Now my setup as it is now :
So now what i ment to do was :
Let the clients connect to the gateway via ETH1 and all the stuff being router to ETH0 which is the NIC that is connected to the internet.
But now i have two huge problems :
1. The DHCP configuration seems to be fine the client machines get their ip adresses and /etc/resolve.conf looks fine to. But somehow the GATEWAY/ROUTER wont let me use the specified external DNs server so i cant do anything on these machines.
2. The firewall script [url] at line 27 should be DROP but if i use this line of code the GATEWAY/ROUTER cannot use his dns server settings so when i try to browse the internet or ping a machine outside my local network it would came up with nothing.