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..
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?
My ISP offers the service of native IPv6. So my ADSL router provides me with a local and global IPv6 address. However after a reboot it takes minutes to finally see the global address when using "ifconfog eth0". During that time I can't do a ping6 to an external server, which seems logical. So I waited several minutes, but no global address. After that I started a KDE session, went back to the console(<Ctrl>+<Alt>+F1) and now the global address was there. Is this normal behavior or should I file bug report?
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.
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?
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:
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.
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
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?
I am new to using ubuntu. I am trying to play with my WLAN by changing its modulation, power, bitrate, channel etc. When I am trying to change the modulation type i had an error like this # iwconfig wlan0 modu 11g Error for wireless request "Set Modulation" (8B2F) : SET failed on device wlan0 ; Operation not supported. so i checked for different modulation types my WLAN supports this produced an error like this. # iwlist wlan0 modulation wlan0 unknown modulation information. I even cannot access the power types my WLAN supports. I am using Intel wireless wifi link 5100. change the modulation type and power for my WLAN?
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.
Is it possible to split a NIC into two lets say.I've seen how in virtual box you set an option (I don't remember which one) that the guest OS uses the same NIC (virtualized?) and gets an IP assigned from the router. For example the host connects to the router using wlan0 and recieves IP 192.168.1.2 then the guest uses the same NIC wlan0 (i think correct me if I'm wrong thats why I ask) and gets 192.168.1.3
My question is: Is it possible to split lets say wlan0 in two in the same OS to get different IP address?and if it is. Can you connect to two different SSID with the same NIC using wpa_supplicant?
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).
I'm using Ubuntu 9.10 on a Lenovo ThinkPad T61 using an Intel PRO/Wireless 3945ABG. My laptop's ability to connect to a wireless network stopped last night, and I'm not sure why. It's definitely something on my end, as my roommate can connect to the internet on a Windows box. I can wire in without a problem, but that's a pain and my Ethernet cable got lost in the shuffle when I moved back to school. I've been able to get into this network before and nothing about it has changed. I've been able to hibernate and restart and such and nothing has ever needed to be reset.
The router's a D-Link WBR-2310. Wicd and Network Manager see the network (I'm back to using wicd) , but wicd appears to get stuck at "Obtaining IP address..." and says "Unable to connect: Cannot obtain IP address". I know my password is correct (I set up the router and I'm the CS undergrad in the apartment so I manage it), lspci sees the wireless card, ifconfig and iwconfig return information about the interface, dmesg|grep wlan0 doesn't seem to have anything terribly out of the ordinary, but here's that output:
Code: allyanncah@taliesin:~% dmesg | grep wlan0 [ 23.514202] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 36.609016] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 38.756143] wlan0: direct probe to AP 00:24:01:cb:4e:7e (try 1) [ 38.758791] wlan0: direct probe responded [ 38.758796] wlan0: authenticate with AP 00:24:01:cb:4e:7e (try 1) [ 38.760587] wlan0: authenticated [ 38.760609] wlan0: associate with AP 00:24:01:cb:4e:7e (try 1) [ 38.763318] wlan0: RX AssocResp from 00:24:01:cb:4e:7e (capab=0x431 status=0 aid=1) [ 38.763322] wlan0: associated [ 38.765502] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready .....
I've tried: - reinstalling wicd - uninstalling wicd and installing network-manager - restarting - shutting down and booting back up - restarting the router - sudo /etc/init.d/networking restart - taking the interface down and back up with ifconfig
I haven't changed anything recently in regards to my wireless card, and all the fixes I've tried are things I've done before without an issue. The only thing I'm wondering about is if doing a hard reset might have broken something (I know this is a cardinal sin, but there's a whole 'nother problem I haven't been able to fix with the OS hanging every once in a while over a VPN daemon when it tries to shut down or restart -- I've left it for hours to see if it actually gets anywhere and no luck, won't do a soft reset). I'm nervous about reinstalling the driver just because I've never had to do it and drivers are a finicky business. I imagine there's a config error somewhere?
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.
Why changing of mac address isn't recommended? The possible reasons that I can find is: 1) it can break firewalls 2) it can break some DHCP implementations ? Is there any other reasons that I have missed ?
Remotely, I can do the first two no problem, but the ifup command causes some problems since the ethernet interface is no longer functioning. Is there some kind of script that can be written for this purpose? Maybe something that will check eth0 every so often and make sure it is running and bring it up if it isn't. Or else a script run with nohup?
I do not intend that changing the IP address will be a frequent occurrence, but when it needs to be done, it must be done reliably and without the possibility that the computer will no longer be reachable for more than a couple minutes or so.
in our server, Fedora 10 64 bit in this,IP Address is automatically changing Actually IP Address is 192.168.1.50 it changing frequently.if i try to edit that to normal it is not showing options. net mask is also is changing from 255.255.255.0 to 24 After reboot the system ,through LAN it is accessible .But not through the network.
I used to play with gw6c ( a client for tunnel broker ) It works well with fedora9 , fedora 10, but not with leonidas. my rpm is gw6c-6.0-0.4.beta4.fc9.i386.rpm ( a little old!) when I tried to install i have got this: libcrypto.so.7 est ncessaire pou w6c-6.0-0.4.beta4.fc9.i386 I try to make a soft link to libcrypto.so.0.9.8k, but nothing; The question :-Is there a solution for that pb - did you know a better client for non native ipv6 connectivity?
I am doing a test on MAC learning and for that ,I need to change my MAC address of linux machine while the interface is UP. To be more clear, consider eth1 in a fedora core 8 machine. And while the interface is UP. I am running a script which changes the MAC address from 10:1:1:1:1:1 to 50:50:50:50:50:50 (i.e 50 times MAC address is changed) . When I try to change the MAC address when the interface it UP, it gives me the following error :
siocsifhwaddr : device or resource busy
I know the way of changing the MAC address by bringing down the interface but I need to know if this can be done while the interface is UP.
I am using Fedora 10 and when I first installed my machine, I had a DHCP assigned address to my network card. Later on I decided that I wanted to give my machine more of a server role, so I switched to static IP using the system-config-network utility. What happened after that was that I did change the IP address and routing information, but DNS information gets lost at every reboot, so I need to type it back again.
I use Ubuntu with Evolution here at work, and we have an Exchange server. can I somehow suck up all of the addresses in the global address list and somehow save them locally and import them to Evolution? Since I can't "link" to the global list it would at least be handy for me to utilize locally.
I have configured qmaill with mysql database and i am using squirrel mail as a webbase client. I have used qmailadmin to create users email id. user which are create using qmailadmin or vpopadmin are able to login into squirrel mail webbase client. But I am not see those user in squirrel mail global address book. please help and provide me prodedure to create global addres book where i can see all user created using qmailadmin or vpopmail.
I have an email server running 10.04 LTS and it's configured with postfix, amavisd-new, and I think sendmail. Does Ubuntu have any built in software to create a global address book? I know there is a way to create an LDAP directory for example. But are there any alternatives?
I want to add an ipv6 address in linux. i am going to use the following command. # /sbin/ifconfig <interface> inet6 add <ipv6address>/<prefixlength> Can anyone explain how this command will works? Is that prefix length value is fixed to 64 or is it vary?if so,can you explain how it could be?
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.
