Public bug reported: Short:
I get no public IPv6 address and "IPv6 duplicate address" in dmesg with IPv6 privacy extensions on. Disabling DAD does not solve it. Disabling privacy extension with "net.ipv6.conf.all.use_tempaddr=-1" in /etc/sysctl.conf, works as a workaround: I get the public IPv6 address based on my MAC address. This is a bug; privacy extensions should not disable IPv6. FWIW: on the same LAN, both Windows 7 and Android 4.x do get a public IPv6. For Windows 7, I'm sure it's IPv6 address with privacy extension. Long: Since some time I did not get a public IPv6 address anymore (provided natively by my ISP). Some lines from dmesg: [51849.455380] IPv6: wlan0: IPv6 duplicate address 2a00:cd8:blabla:1af4:6aff:fe9c:ced4 detected! [52038.685221] IPv6: wlan0: IPv6 duplicate address 2a00:cd8:blabla:1af4:6aff:fe9c:ced4 detected! [52208.691846] IPv6: wlan0: IPv6 duplicate address 2a00:cd8:blabla:1af4:6aff:fe9c:ced4 detected! [52393.831468] IPv6: wlan0: IPv6 duplicate address 2a00:cd8:blabla:1af4:6aff:fe9c:ced4 detected! [52546.966404] IPv6: wlan0: IPv6 duplicate address 2a00:cd8:blabla:1af4:6aff:fe9c:ced4 detected! [52713.804952] IPv6: wlan0: IPv6 duplicate address 2a00:cd8:blabla:1af4:6aff:fe9c:ced4 detected! I tried to disabled duplicate detection like below, but that didn't work: sander@R540:~$ sudo sysctl net.ipv6.conf.eth0.accept_dad net.ipv6.conf.eth0.accept_dad = 1 sander@R540:~$ sudo sysctl net.ipv6.conf.eth0.accept_dad=0 net.ipv6.conf.eth0.accept_dad = 0 I got this in dmesg: [58037.095963] IPv6: wlan0: IPv6 duplicate address 2a00:cd8:blabla:1af4:6aff:fe9c:ced4 detected! [58037.519619] IPv6: wlan0: IPv6 duplicate address 2a00:cd8:blabla:cdb:467c:e1e6:7532 detected! [58038.424991] IPv6: wlan0: IPv6 duplicate address 2a00:cd8:blabla:58eb:c65e:25e:b3c7 detected! [58039.141499] IPv6: wlan0: IPv6 duplicate address 2a00:cd8:blabla:a413:1a:2614:e16a detected! [58039.141507] IPv6: ipv6_create_tempaddr: regeneration time exceeded - disabled temporary address support It seemed that after a fresh boot, there was a public IPv6 for a few seconds, which then disappeared. "rdisc6 wlan0" shows a correct function advertisement. Somewhere in the trial-and-error process, I also got: [14790.090074] ICMPv6: NA: someone advertises our address 2a00:0cd8:blabla:1182:7070:8ebf:4fe1 on wlan0! [14790.090228] ICMPv6: NA: someone advertises our address 2a00:0cd8:blabla:1af4:6aff:fe9c:ced4 on wlan0! I finally fell back to this workaround: Disabling privacy extension with "net.ipv6.conf.all.use_tempaddr=-1" in /etc/sysctl.conf, works as a workaround: I get the public IPv6 address based on my MAC address. See more info here: http://ubuntuforums.org/showthread.php?p=12501110 FWIW: My modem is a Zyxel P-2812HNU-F1 with firmware V3.11(TUE.5)-2_20121211. I don't think this bug is related to the modem, as: - rdisc6 works - MAC based IPv6 works - other devices work As I'm now forced to use my MAC based IPv6 address, which means less privacy and thus less security, I'll mark this also as a security related bug. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-21-generic 3.5.0-21.32 ProcVersionSignature: Ubuntu 3.5.0-21.32-generic 3.5.7.1 Uname: Linux 3.5.0-21-generic x86_64 ApportVersion: 2.6.1-0ubuntu10 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sander 2644 F.... pulseaudio CRDA: country NL: (2402 - 2482 @ 40), (N/A, 20) (5170 - 5250 @ 40), (N/A, 20), NO-OUTDOOR (5250 - 5330 @ 40), (N/A, 20), NO-OUTDOOR, DFS (5490 - 5710 @ 40), (N/A, 27), DFS Date: Sat Feb 9 22:08:08 2013 HibernationDevice: RESUME=UUID=56ea62f2-0b4c-4dc9-9f41-b3423fccfa31 InstallationDate: Installed on 2012-06-27 (227 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: SAMSUNG ELECTRONICS CO., LTD. R530/R730/R540 MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-21-generic root=UUID=97828b35-0e7b-4cf2-9854-ae33c942d4bd ro quiet splash RelatedPackageVersions: linux-restricted-modules-3.5.0-21-generic N/A linux-backports-modules-3.5.0-21-generic N/A linux-firmware 1.95 SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-10-19 (113 days ago) dmi.bios.date: 06/21/2010 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: 08JV.M029.20100621.hkk dmi.board.asset.tag: Tag 12345 dmi.board.name: R530/R730/R540 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr08JV.M029.20100621.hkk:bd06/21/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnR530/R730/R540:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnR530/R730/R540:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A: dmi.product.name: R530/R730/R540 dmi.product.version: Not Applicable dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: amd64 apport-bug quantal running-unity ** Information type changed from Private Security to Public -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1120617 Title: No IPv6 and "IPv6 duplicate address" with IPv6 privacy extensions on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1120617/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
