OpenSUSE :: How To Disable IPv6
Jan 9, 2011
I am experiencing very slow internet speed while downloading files from internet. Although torrent (KTorrent) download speeds are okay. I am using 'rekonq' Web Browser. Konqueror is slower than this and Firefox is the slowest. Thats why I have uninstalled Firefox from my Suse 11.3 KDE. I went through the guides mentioned here:
Disable IPv6 But the images shown here in the first post (by caf4926) [URL] have slightly different configuration from my computer. (My account does not allow me to post attachments). In the pic 2, Do we have to select the option: "User Controlled with NetworkManager" before unchecking the Enable IPv6 option.
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Jun 18, 2010
does opensuse 11.2 come with IPv6 enabled by default? where in the gnome gui can i access these settings?
Edit-i went into the gnome network manager applet and i cant find any IPv6 settings for any of my used connections-ethernet, wireless and VPN connections all seem to only IPv4. Can anyone else confirm that opensuse 11.2 uses only IPv4 on its network connections?
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May 4, 2010
Okay so on WebUpd8 website, (url), I found a way to disable IPv6 and I was hoping to get a little more of an understanding of if I should or not from comments there, but unfortunately I haven't gotten enough to say let's do that. So I figured I might get a better understanding on here.
I am not very familiar with IPv6, but to my understanding its a newer thing that's rarely found currently with ISPs, but can be a security issue now.
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Aug 9, 2010
Anyone know how to disable IPv6 but still use IPv4?
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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?
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Apr 2, 2009
I have tried to disable the ipv6 support in ubuntu 9.04 32bit but the /etc/modprobe.d/aliases does not exist so I can't disable the suport as sugested for the previews versions. I need to disable it becouse it is pounding a total maihem in my vamware machines.
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Sep 25, 2010
Howto disable IPV6 in Lenny?
I added this line:alias ipv6 off in /etc/modprobe.d/aliases:# cat /etc/modprobe.d/aliases
# These are the standard aliases for devices and kernel drivers.
# This file does not need to be modified.
#
# Please file a bug against module-init-tools if a package needs a entry
# in this file.
[Code]....
alias ipv6 offbut howto check after restart if ipv6 was loaded or not?
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May 7, 2011
I just finished setting up my slack machine as a home server (printers & files) and I noticed that I have an IPv6 address (from ifconfig)... I didn't know I did. I used to work in tech support and when a windows or OSx machine didn't connect properly on a LAN, disabling IPV6 was a common troubleshooting step. Is there a way to easily turn inet6 connectivity off/on in Slackware? (I want to keep the ability to get an IPv6, we will all use those in the future)
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Jan 4, 2010
have had a problem with my ubuntu system recently in that it will only let me connect to the Internet through Firefox if I switch network.dns.disableIPv6 on. How do I do the equivalent in Ubuntu to enable me to use Ephiphany etc which are not working anymore
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May 26, 2011
When I run OpenVPN server - tap0 adapter, it breakes Teredo(Miredo) IPv6 address down. I dont need IPv6 on OpenVPN, so is there any way to disable IPv6 on tap0 completely?
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Dec 31, 2010
I have installed bind with yum install bind bind-chroot.I am having query timeouts due to no ipv6 connectivity.Is there a way to re-compile and not loose the chroot structure?Or is there another way to disable ipv6 lookups?Example of issue resulting in ipv4 query timeout:
30-Dec-2010 17:52:03.226 client x.x.x.x#53593: view internal: query: paypal.com.cms.local IN A +
30-Dec-2010 17:52:03.227 client x.x.x.x#53594: view internal: query: paypal.com.cms.local IN AAAA +
30-Dec-2010 17:52:03.228 client x.x.x.x#53595: view internal: query: paypal.com IN A +
[code]....
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Apr 10, 2011
Now that IPv6 is becoming more and more common, I found the need to disable IPv6 on some interfaces but have it enabled on other. I found that /proc/sys/net/ipv6/conf/*/disable_ipv6 does exactly that. I am now wondering if anybody knows, why are networking scripts so counterintuitive. /etc/sysconfig/network has an option:
NETWORKING_IPV6=yes
All this option does is disable some ipv6 services (dhcpv6...), it does not disable IPv6 in whole (as one would assume...that's why you had to disable it with module parameters). Searching for more IP6 related config option, one can find that /etc/sysconfig/network-scripts/ifcfg-* scripts can contain:
IPV6INIT=yes
Again, this option does not disable IPv6 protocol on the interface, it just skips running ifup-ipv6/ifdown-ipv6 scripts. I added a /sbin/ifup-pre-local. Now, this script runs before ethX entries are created (other scripts run when it's already too late) in /proc directory, so it modifies default values which are then used after those entries are created:
#!/bin/bash
#
[ -f "/etc/sysconfig/network-scripts/$1" ] && . /etc/sysconfig/network-scripts/$1
[code]...
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Jan 14, 2010
I set up a static IPv6 address and a gateway in /etc/network/interfaces. However, a bad router in my network environment alway send wrong ICMP router discovery messages to me. So I have got extra (wrong) IPv6 address and gateway, and the routing is confused. On Windows Servers, I can use "netsh interface ipv6 set interface "Local Area Connection" routerdiscovery=disable" to disable ICMP router discovery. But I don't know how to disable it on Ubuntu 9.10. How could I disable ICMP router discovery for IPv6?
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Jun 15, 2010
When I go out of town I normally take my Acer Netbook to travel light. I ran into a problem over the weekend which I have seen before and couldn't find the cause. I used the wifi at the house I was staying at and could connect to the router via Wicd and ping outside IP addresses, however, I could not connect to any websites with Iceweasel or Midori. I receive the generic error that the browser is unable to connect. Now that I am back at my house I cannot repeat the problem, but have found a couple threads about disabling ipv6 protocol. The symptoms sound like a browser setting, but I couldn't find any settings that looked unusual.
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Mar 15, 2011
Is simply adding "alias net-pf-10 off" to modprobe.conf enough to keep IPv6 completely dead? Should I comment out the IPv6 loopback address in /etc/hosts or anything like that?
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Jul 22, 2009
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?
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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.
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Feb 7, 2011
I decided to enable dual stack on my home 11.3 machine and play with IPv6. I use ifup to assign static addresses to eth0. FYI here are some things I found:
1. YaST doesn't seem to support associating IPv6 addresses to interfaces, it complains that the address is invalid. However you can edit /etc/sysconfig/network/ifcfg-eth0 manually and specify it like this:
Code:
LABEL_0='V6'
IPADDR_0='FEC::10.1.1.1/64'
SCOPE_0='site'
and when you restart the networking you will see an additional IPv6 address associated with eth0. Fortunately YaST doesn't mangle the entry when you look at it, but you can't edit it.
2. The SCOPE qualifier is documented in /etc/sysconfig/network/ifcfg.template, but seems to have no effect. Site local addresses in IPv6 are supposed to start with FE[CDEF] according to this:
The TCP/IP Guide - IPv6 Special Addresses: Reserved, Private (Link-Local / Site-Local), Unspecified and Loopback
Once bound, you can connect to services using the IPv6 address just like normal. You have to use ping6 instead of ping though.
I added an AAAA record to my nameserver and that seems to work. Whether the client software tries the IPv6 address varies. It depends on whether the software asks for the AAAA record and uses it. It seems my web browsers don't. I'm not surprised, since few people have IPv6 tails from their ISP. I'm going to look and see if there is some browser setting I have to adjust. I also have to figure out a way of making sure that only LAN destinations use IPv6.
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Feb 16, 2011
I am running suse11.3 32 bit, and have installed squid3.
As far as I can tell it's not been compiled with ipv6 support.
Or have I missed some option in some file somewhere?
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Apr 12, 2010
it's a couple of weeks I can't perform YaST updates from my openSUSE 11.2. The reason is that YaST wants to connect to repositories "only" through IPv6, but my network doesn't support it. I quoted only because I suppose it prefers v6 over v4, but it keeps trying to connect without switching to v4 or returning error.
Even if I disabled IPv6 from YaST/Networking/Network Settings, I still have a local scope address. I connect to Wifi using KNetworkManager. The TCP/IP stack should know that if an interface has a local scope v6 address and a global v4 address, it's a bad idea to keep trying with v6. Italian mirror, garr.it, of openSUSE repository both has v4 and v6 addresses. If I try to ping opensuse.mirror.garr.it I ping v4, but if I try to telnet that host on port 80 it tries to connect to v6. Same if I try to connect with Firefox.
How to tell Linux that I don't have IPv6? I'm connecting from University of Naples wireless network. While unina has IPv6 via GARR's Teredo tunnel (2001:760::/32 as I remember), it doesn't reach students' network because DHCP server doesn't release IPv6, nor Zeroconf obtains one. I just would like to use classic IPv4 until, at least for now.
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Jun 8, 2010
Is it possible to setup samba to work over IPv6?
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Aug 10, 2010
I have an issue on a few servers where IPv6 stops working after a reboot. I can ping anything within the same subnet but anything outside of that it gives me host unreachable. I believe that it is not routing for some reason, but I am not sure why. I have tried adding a default Ipv6 route for Eth3 but nothing seems to work.
uname -a
Linux server-1 2.6.27.19-5-default #1 SMP 2009-02-28 04:40:21 +0100 x86_64 x86_64 x86_64 GNU/Linux
Code:
route -A inet6
Kernel IPv6 routing table .....
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Nov 1, 2010
I'm having a little problem here. That, or I'm missing the obvious staring me in the face. I have this file server, called toad. I nuked it's system disk, reorganising the partitions and upgrading to openSUSE 11.3 x64. I installed vsftd with "Yast FTP server", and the config looks OK. I even compared it with that of another machine. But when I try to connect, this is what I get:
user@mainmachine:~> ftp
ftp> open toad
Connected to toad.geuens.org.
500 OOPS: could not bind listening IPv6 socket
I'm prettige sure IPv6 is deactivated. The firewall is disabled on both machines. I've looked this over again and again. Can't find it. It's not the connecting machine, I've tried from another.
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Apr 5, 2011
IPV6 gets more and more interesting. YAST is failing to connect to the repositories. I have disabled ipv6 in several ways but none of them work or YAST (also Konqueror) seems to do it's own thing. I have managed to get Firefox to work see my "slow internet seems to be down to dns post" made earlier today. So as a check on the YAST problem I loaded each of the repository addresses into Firefox and lo they all connect without any problem at all. So it seems that the YAST problem is down to IPV6
In order to disable ipv6 I initially added ipv6.disable=1 to the end of all of the bootloader APPENDS. More recently following up further info on here I added a couple of lines to
/etc/modprobe.d/99-local.conf. These were:
alias net-pf-10 off
alias ipv6 off
This doesn't work either.
Maybe of use to others - It seems it's possible to see if IPV6 is active by typing the following into the command line:
ip a | grep inet6
I'm told if it is active lines will be output? So just what do I do to disable it in YAST and I hope in Konqueror too? It's beginning to look like it is enabled or disabled at the app level according to the Firefox fix.
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Apr 10, 2011
I've had a hell of a time with this and now all but YAST2 are ok. Going back some time to 10.0 this could be used to disable it very completely.
open terminal and run
echo "alias net-pf-10 off" >> /etc/modprobe.conf
echo "alias ipv6 off" >> /etc/modprobe.conf
restart computer. Has anyone used this on more recent issues even 11.4 and are there any repercussions?I assume that the inverse will but it back on ie off's just become on's? I will be using cups when I install my printer which is one concern and I am not at all sure that modprobe will do anything anymore?
I also recollect that there is a command to cause the kernel to effectively reboot which would save restarting. Can't remember what it is. Maybe some one can refresh my memory.
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Feb 19, 2010
How do I assign IPv4 and IPv6 static addresses permanently in OpenSUSE 11.2? Currently I am only able to assign either IPv4 or IPv6 static address not both. I cannot find even the interfaces file(/etc/sysconfig/network/interfaces).
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Aug 27, 2010
In an IPv6 test environment I have installed an openSUSE 11.2 system. I have also installed telnet and it works with IPv4 (I can open a session from a Windows console with "telnet ipv4addr").
If I try to open a session with "telnet ipv6addr" I get the response: "Connecting To ipv6addr. Could not open connection to the host, on port 23: Connect failed".
Does the telnetserver support IPv6 or did I something wrong?
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Jul 8, 2010
On our Home LAN, we have several different SuSE machines running. Now, I have run into a problem which I cannot solve myself. One of the computers (a 11.2) just doesn't receive any IPv6 lease from the main router. The router has radvd running and distributes addresses to the other computers just fine. The network card on the box ist a
[Code]...
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Jul 8, 2011
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?
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Aug 26, 2010
I installed 11.3amd64 as a VM under Vista/VMWare Player - all worked fine. I have now installed it as a physical system. It nstalled cleanly BUT during first boot it could not access the repos. With each repo it gave the message
- download (curl) error for (repo)
- error code connection failed
- error message could not resolve host (repo)
This was followed by a message box containing
- UI syntax error
- no widget with ID 'contents
Firefox could not access the internet (cannot find server) until I disabled IPV6 (I used about:config), now it works fine. I think the repos problem is because of IPV6 - I usually have trouble with IPV6. I tried disabling IPV6 with the following (How To Disable ipv6 on SuSE Linux | Linux Poison)
[code]......
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