Ubuntu Networking :: Ipv6 Link-local Address Not Configured On Eth0 (server)

Feb 18, 2010

I added an init script numbered just before bind9 starts, which needs to see the ipv6 link-local address on eth0. Sometimes this address is not configured, yet. In all cases it eventually is configured.

I am unable to find any script that is configuring the ipv6 link-local address (which is in part based on the MAC address). Does anyone know if there is some script or program that is supposed to be doing this, or is it an internal kernel function?

One workaround I am considering is making this init script go into a loop around sleep 1 to keep checking for the ipv6 address. But I'm concerned this might cause some problems. Any suggestions? I don't want to let it move on to start bind9 until the configuration this script does (more ipv6 addresses) is done.

This is on Ubuntu 9.10 server (for which there is not a prefix choice).

View 6 Replies


ADVERTISEMENT

Networking :: Referencing Hosts By (special) Hostname For IPv6 Link Local Address

Apr 30, 2010

I can reach other hosts by means of their global addresses by either the IP address or hostname (that has the global address). What I want to (also) do is have a hostname that references the IPv6 link local IP address (an AAAA record in DNS, or just the fe80::<whatever> address in /etc/hosts) and use that host name in commands to access that host. The problem is, an interface ID is needed when making such a reference.

It sure looks like the programs just pass the host name string on to the resolver library, which does not understand the significance of the '%' even though it could find and see that the name preceding the '%' is consistent with that being an IPv6 link local address (e.g. the logic could have been "split at first % and see if preceeding name is found as a link local address and accept that if so, or ignore the split otherwise" ... but it isn't). Is there a different syntax for this ... or was it overlooked in the design of programming around IPv6?I want to be able to address a host by its link local address, while still using a mnemonic instead of having to type the IPv6 address.

View 1 Replies View Related

CentOS 5 :: Device Eth0 Has Mac Address XX Instead Of Configured Address?

Oct 22, 2009

after a yum update on my CentOS 5.3 I got this error when shutting down eth0 on reboot...

Shutting down interace eth0: Device eth0 has MAC address XXX instead of configured address XXX ignoring [FAILED]

View 2 Replies View Related

Software :: Device Eth0 Has Mac Address / Instead Of Configured

Jul 29, 2011

I am trying to perform VM cloning using KVM in a centos 5.6 machines. I copy the memory contents of a running vm to an external state file and try to use that to start another VM in a different machine. While starting the cloned VM I provide a different mac address but once it resumes it has the old one . I tried changing the mac address in ifcfg-eth0 but I get the error: Device eth0 has a mac address xx:xx instead of configured xx:xx.Ignoring .

Is there some way to change the ip/mac of the cloned vm without the need to restart the VM ( Then the purpose of cloning will be defeated). Thanks a lot for the info.

View 1 Replies View Related

Fedora Networking :: FC15 IPV6 Wireless Router - No Longer Gets An IPv6 Address

Aug 31, 2011

I have been struggling to get FC15 to act as an IPv6 router for a while now, am sure I am missing something trivial.. The idea is that I have a ppp / adsl connection (this works fine), use the wireless card on my pc with hostapd and dhcpd to provide connections to other pcs (works fine), and radvd to delegate ipv6 addresses.

The issue seem to be that as soon as I turn on ipv6 forwarding (net.ipv6.conf.all.forwarding =1), the ppp connection no longer gets an IPv6 address. This means the router cannot ping any ipv6 address outside my network.

If I disable ipv6 routing, my router gets an IPv6 address on its ppp connection, and can ping things such as ipv6.google.com just fine, however (of course) no packets are forwarded from my network and radvd complains that forwarding is disabled.

View 1 Replies View Related

Ubuntu Networking :: Static IP Address And The Install Configures For A DHCP Configured Address - Network Not Starting

Dec 16, 2010

Version 10.04 LTS. Installed desktop version and network worked but I needed a static IP address and the install configures for a DHCP configured address. I tried changing to static address using the System->Preferences->Network Connections application but was unable to get the system to come up with the network up.

So I manually modified the /etc/network/interfaces and the /etc/resolv.conf files. I restart the system but when I do an ifconfig, I don't see a configured IP address on eth0 (only the loopback address). If I run /sbin/ifup eth0 everything then works fine and ifconfig shows the correct address bound to eth0.

My files are as follows:

View 2 Replies View Related

Networking :: Networking Routing \ Use The Terminal To Assign Server Eth0 A Proper IP Address?

Jun 8, 2010

i know exactly what i need to do, im just not familiar enough with command line to do it properly.i have 7 computers.the first 4 are connected to a router via wireless at one end of the house. of the last 3 only 1 will be able to access the router via wireless, so it needs to share it's one wireless connection via ethernet. this computer i'm going to call 'server'server will have two IP'swlan0 192.168.1.6 this connects to the router that has internet access.eth0 i intend to have the following settingsip:192.168.0.1sub: 255.255.0eth0 will connect to a second router, where the cat5 cable goes from the server, into the internet port of the router where i will define the router's static IP:IP: 192.168.0.100sub: 255.255.255.0gateway 192.168.0.1i have then set the router IP for LAN handling as 192.168.27.1 and all ethernet connections will have a 192.168.27.x IP.

so i need to know how to, without a gui application, use the terminal to assign server eth0 a proper IP address, and tell the server to take the connection it has and share it through eth0 to supply internet for the last 2 computers via ethernet.i had it set up in this way with a windows machine being the one that had the wifi access, but i'd rather have it setup for the ubuntu server to do this task. security is imperative for these 3 remaining machines, so just getting 2 more wifi adapters for a connection to the initial router isn't an option.the 2 that connect to server do so through SSH and though server IS connected via wireless it only makes outward connections through

View 1 Replies View Related

Ubuntu Networking :: Can't Get IPv6 Address

Nov 4, 2010

I have a networking problem with my computer. Under Windows, the computer can get both v4 and v6 address via DHCP. However, the same computer can only get v4 address under Ubuntu. Does anybody know how to solve this problem?

View 3 Replies View Related

Networking :: Make Practical Use Of Link Scope IPv6 Addresses?

Jun 23, 2010

I am trying to use link scope IPv6 addresses to permit two machines to connect using IPv6, but I cannot figure out how to do it without specifying the interface to use on every connection. Here is an example ping:

[root@ppatel-brn1 ~]# ping6 -c 3 fe80::204:75ff:feb6:2994
connect: Invalid argument
[root@ppatel-brn1 ~]# ping6 -c 3 -I eth0 fe80::204:75ff:feb6:2994
PING fe80::204:75ff:feb6:2994(fe80::204:75ff:feb6:2994) from fe80::214:22ff:febd:7c1f eth0: 56 data bytes
64 bytes from fe80::204:75ff:feb6:2994: icmp_seq=0 ttl=64 time=0.836 ms
64 bytes from fe80::204:75ff:feb6:2994: icmp_seq=1 ttl=64 time=0.286 ms
64 bytes from fe80::204:75ff:feb6:2994: icmp_seq=2 ttl=64 time=0.280 ms

[Code]...

View 3 Replies View Related

Networking :: Can't Use Ipv6 Although Getting Address?

Jun 30, 2009

I have a problem with my ipv6 connection: although I can't get ipv6 address with DHCP, I can't use ipv6 network. I tried [URL], and the tortoise is static. I want to fix it out , so I use 'ifconfig' to see my network configuration:

eth0 Link encap:Ethernet HWaddr 00:50:8d:ef:dd:06
inet addr:210.77.9.102 Bcast:210.77.11.255 Mask:255.255.252.0
inet6 addr: 2002:d24d:b64:4:250:8dff:feef:dd06/64 Scope:Global

[code]....

Some people told me that the fisrt ipv6 address was wrong and unsuitable for ipv6 connecting. I tried /ect/init.d/networking restart but it didn't work. How can I use the second address as my ipv6 address and fix the problem out ? Now it seems there is not problem with the ip adress but the route. After watching some video, I suddenly could use ipv6. I did 'ifconfig' again and nothing was different. However, the result from the command 'ip -f inet6 route' changed: the last default route was gone and there was only one default route.

View 2 Replies View Related

Server :: IPV6 Mail Address Not Listening On 110

Feb 23, 2011

I've registered a top-level domain site.com pointing to my IPv6 address (6to4 tunnel). Everything looks ok, dig command, nslookup command shows requested output, but: I'm not able to connect to mail.site.som on 110 port. I still get an error messaged, that connection has been refused. I've populated the ip6tables with commands to open desired port but with no success. I'm listening on 25, am able to connect to this port, but not to 110.

Command netstat -an | grep "LISTEN " shows that I'm not listening on 110 port, although I'm just added this port to the firewall exceptions. Telnet to ::1/tunneled IPv6 address is successful. Postfix installed, configured properly, ping6 working. Everytime I try to send email from external domain, I'm advised that the mail domain is not pointing to A record.

View 6 Replies View Related

CentOS 5 Networking :: Kernel Rpm Install After Error "Bringing Up Interface Eth0: Device Eth0 Has Different MAC Address Than Expected, Ignoring"

Dec 26, 2010

i install kernel rpm after i boot that kernel network not working kernel name : kernel-rt-trace-2.6.24.7-132.el5.centos.i686 [URL] error "Bringing up interface eth0: Device eth0 has different MAC address than expected, ignoring."

View 1 Replies View Related

Ubuntu Networking :: Ipv6 Router Not Routing To Local LAN?

Mar 6, 2011

my local clients connected to the IPv6 internet.

I've already designated a machine to act as the router to the hurricane electric tunnel. I created a he-ipv6 device on it and can ping ipv6.google.com. No problem.

The problem happens when I want clients to use that router. That is, I can't ping ipv6.google.com from other machines on my LAN.

I setup /etc/radvd.conf, which seemed to successfully give out addresses to my clients:

interface eth0
{
AdvSendAdvert on;
prefix MY:HEREFIX::/64

[Code]....

I start the daemon and check that my clients have new ip6 addresses. So far so good. On my router, I do a sysctl -p and see that /proc/sys/net/ipv6/conf/all/forwarding = 1. I haven't touched ip6tables/iptables yet. Both are in a flushed state.

My ipv6 router is actually inside the LAN which gets internet from another machine which has let ipv6 packets through using protocol 41. I figure I don't have to worry about anything else because if my router can ping6 ipv6.google.com, the failure point would be there.

So my clients get ip6 addresses, but can't ping6 the router nor the ipv6.google.com. They do resolve ipv6.google.com however and I checked the traffic on the router over he-ipv6 from ifconfig and RX and TX bytes were changing during the ping.

My router has only one physical device for forwarding, eth0 and the tunnel device he-ipv6. Do I need to add some kind of ip6tables to see a simple ping from my clients?

View 1 Replies View Related

Networking :: Disable The Ipv6 Address Only?

Jul 28, 2009

I have a host and typing ifconfig I get:

eth0 Link encap:Ethernet HWaddr 00:0E:7F:4F:E4:09
inet addr:130.130.9.9 Bcast:130.130.255.255 Mask:255.255.0.0
inet6 addr: fe80::20e:7fff:fe4f:e409/64 Scope:Link

[code]...

and to do a test i want to disable or delete the ipv6 address, but mainteining the other configured parameters. Looking on the ifcfg config file I have

DEVICE=eth0
BOOTPROTO=static
BROADCAST=130.130.255.255

[code]....

and nothing about IPv6... Then, using ifdown-ipv6 could i remove only the ipv6 address?

View 11 Replies View Related

Fedora Servers :: Dig Command With IPv6 Address As Server

Mar 2, 2009

I am trying to get the MX record using dig command supplying IPv6 address of host. but i am getting connection timed out .

while with IPv4 address and host-name its working fine.

View 1 Replies View Related

Networking :: IPV6 Address Appearing On Interface

Nov 22, 2010

When I do ifconfig than IPv6 address is appearing on an interface. However when I run the system-config-network and select to edit same interface than it shows the normal ip4 192.168.1.x address. Why is it like that? ipv4 at one place and ipv6 at other?

View 3 Replies View Related

Ubuntu Networking :: Assign An IPv6 Address To Separate Users?

Apr 15, 2011

I have an Ubuntu 10.04 server/router with IPv6 internet connectivity (I have an internet routable /64 subnet). Since I have this abundance of IPv6 addresses I wanted to try and assign v6 addresses to specific users on the local system. I've been looking at ip6tables with packet mangling but I don't seem to be able to find out how to do this or if this is even possible.

Current configuration: eth0: Local network, has the /64 IPv6 public range active and the IPv4 LAN range. tun0: 6in4 tunnel with a ISP assigned public v6 address. eth1: Standard IPv4 internet connection.

All users on my system use the v6 address configured on tun0. I want to force them to use the /64 range which is configured on eth0. If I can force users to use a specific v6 address, I'll configure more then one v6 address on this interface based on the users userID on the system.

View 2 Replies View Related

Ubuntu Networking :: Ipv6 Global Address When Changing WLAN?

Jun 23, 2011

I've two WLAN AP's with both a different IPv6 subnet. When I change from one AP to the other, my IPv6 Global address stays valid and so is the default IPv6 gateway. After a while I get another Global address from the second AP's subnet and another default IPv6 gateway for the second subnet. Both have the same metric. IPv6 connectivity is broken now. When I disable wireless on the laptop and reenable it, it flushes all IP addresses and receives new ones and connectivity is restored. Does anyone know if this is normal behaviour or should it normaly flush all the addresses when changing network? It's a bit silly to have to disable/enable wireless all the time..

View 4 Replies View Related

Networking :: Hget IPv6 Address Using Ioctl() SIOCGIFADDR

May 19, 2010

I have retrieved IPv4 address successfully using

Code:
struct ifreq ifr;
fd = socket(AF_INET, SOCK_DGRAM, 0);
ifr.ifr_addr.sa_family = AF_INET;
ioctl(fd, SIOCGIFADDR, &ifr)
for IPv6 address I tried

[Code]....

View 5 Replies View Related

Ubuntu Networking :: ADDRCONF(NETDEV_UP): Eth0: Link Is Not Ready

Apr 22, 2010

My installation has stopped detecting my wired network. Another computer connects fine with the same cable to the same access point. As far as I can tell it is simply behaving as if there was no network available from that cable but obviously there is. It was working a couple of hours ago, and I didn't install or uninstall anything, just shut down and booted up again.

LAN is enabled in the BIOS ifconfig does display eth0 ifup eth0 returns "Ignoring unknown interface eth0=eth0" in the output from dmesg:

"ADDRCONF(NETDEV_UP): eth0: link is not ready"

network appears in lshw and is not listed as disabled

View 9 Replies View Related

Networking :: No IPv6 Global Address When Restart The Network Service

Jul 26, 2010

I addes IPv6 address to my interface as

Code:

ifconfig eth0 inet6 add 3fff:ffff:6:5:4:3:2:1

But, when I restart the network service this IPv6 address is gone. How could I make it as a permanent IPv6 address( that should be edited or deleted when I want but not when I only restart the network)to my interface?

View 1 Replies View Related

Ubuntu Networking :: Can't Get IP Address On Eth0

Jul 1, 2010

Since my upgrade to 10.04 I can't use my eth0 wired connection.The wireless works fine.I have tried auto eth0 in network connections set to manual and dhcp. eth0 shows up in ifconfig but no address is assigned.

View 1 Replies View Related

Ubuntu Networking :: Set A Permanent IP Address For Eth0?

Feb 28, 2011

The IP address I want for the gateway computer is 192.168.1.100 As I have 'sharing' enabled in Network manager, there is no provision there to specify the IP address for eth0. That is, cannot manually set it there. Every time I boot up, the IP address changes to

[Code]...

View 9 Replies View Related

Fedora Networking :: Cannot Get IP Address For Eth0

Aug 2, 2009

I downloaded Fedora 10 32bit and put it on a Dell Dimension 8200 to save it from the recycle bin. Everything seems to work except I cannot get an IP addr. Roadrunner is my ISP using a cable modem and a Linksys Instant Broadband Series Etherfast Cable/DSL router model BEFSR41. In system-config-network, the nic shows inactive. If I activate it a window opens saying "determining IP information for eth0". After a short time the message adds the word "failed". Using a Windows PC on the same network, I can look at the DHCP connections on the Linksys and I see the MAC addr for the PC running Fedora.

From the OS installation, /etc/sysconfig/networking/devices/ifcfg-eth0 has following:
DEVICE=eth0
HWADDR=00:80:ad:d1:88:c9
ONBOOT=yes

[Code]....

View 6 Replies View Related

Ubuntu Networking :: Eth0 Can't Hold The Gateway Ip Address

Aug 21, 2010

I would like to configure the eth0 manually. I can configure the ip address and sub-netmask but the system can't hold my gateway ip address (I added). It will keep it 0.0.0.0. I have no problem when I getting IP address from DHCP server.

View 1 Replies View Related

Networking :: Production Server With Static IPs On Eth0 And Eth0:1 - Getting Private LAN On Eth1?

Jul 1, 2010

I have two servers on a vlan at my datacentre/colocation and previously both servers had public IPs on their eth0 interfaces. The servers are HP ProLiant DL360s - one is a G4 and one is a G5 The newer G5 is now the LAMP server and the G4 has been retired and I want to repurpose it as an iSCSI target using openfiler freenas or similar.

My G5 has public/static IPs lashed to the eth0 physical interface and the eth1 is not configured to do anything yet. The G4 will have both interfaces available - perhaps one for ssh access from one of my static public IPs and the other to be a private IP on the local vlan. Here is what I am trying to get my head around...

The G5
eth0 - Public IP - full LAMP services on two or three virtual interfaces
eth1 - Private IP 192.168.0.1
The G4
eth0 - Public IP for ssh
eth1 - Private IP 192.168.0.2

Because my traffic between eth1 on these boxes is via private IPs on the local private vlan it doesn't add to my quota for bandwidth. How do I go about configuring the routing and gateways and other aspects of this so that I can run a private IP space network between the eth1s and still serve the outside world from the eth0s...

I am afraid that if I assign the private IPs to the eth1 interfaces the routing may either not work or interfere with the access to the production internet facing interfaces (eth0s).

View 10 Replies View Related

Networking :: Alarm On Local System If Link Gets Down

Mar 1, 2011

Actually, I have two ISP's internet connection on firewall. I want to use third party software on my workstation if any one link gets down, I got the alarm on local system. How to get an url for download any freeware software.

View 1 Replies View Related

Fedora Networking :: Having Terrible Time Getting IP Address For Eth0

Dec 19, 2009

I am trying to get networking up on an old PII which I have successfully installed with FC4. There is a link and activity on the onboard interface because I see the indicator lights. The controller is a 3Com PCI 3c905 Boomerang 100baseTx @ 0xdc80.The only message returned by dmesg about eth0 is "Dropping NETIF_F_SG since no checksum feature."The driver module, 3c59x, is loaded as well as the mii module that depends on it.There is something about "unknown parameter`irq'" in the dmesg text regarding the driver.I noticed that eth0 is sharing an IRQ with the UHCI Host Controller.That should not be a problem, but it should not be necessary. And I could do away with USB if this is a conflict and that is the easiest way to solve it.When I drop to console at runlevel 3, and call dhclient, which is installed, I get a message telling me there is no reply to the dhcp request.I don't think the problem is on the router/switch side.

View 5 Replies View Related

CentOS 5 Networking :: Eth0 Unavailable - Different MAC Address Expected?

Jul 8, 2010

New to CentOS5.5 I'm experiencing some trouble in order to continue my configuration. I've just installed my vmware tools and configured my network card with system-config-network

Edit eth0 (eth0) - vmxnet3 -> with a static IP I rebooted my server and since then I lost my eth0. I still see it in system-config-network, but I can't active it anymore.:

/etc/init.d/network start Bringing up interface eth0: Device eth0 has different MAC address than expected, ignoring. [FAILED]

View 2 Replies View Related

CentOS 5 Networking :: Secondary IP Address Won't Work On Eth0

Jul 1, 2011

Everything worked fine until very recently, and without apparently ANY change to the settings on the server, a secondary IP that was assigned to my server won't work anymore..Any IP attached to the same server works fine.. So in my case, the problematic IP is 213.8.155.67. The other IP (213.8.155.42) works without any problem.How would I go about troubleshooting this?

ifconfig:
eth0 Link encap:Ethernet HWaddr 00:26:B9:44:11:3A
inet addr:213.8.155.33 Bcast:213.8.155.127 Mask:255.255.255.128
inet6 addr: fe80::226:b9ff:fe44:113a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

[code]...

View 3 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved