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Thread: Update - now IPv6 adress on interface

  1. #1

    Question Update - now IPv6 adress on interface

    Hi again!TW 64bit with KDE, running fine for more than a year. In YasT -> Network Settings IPv6 is not enabled on "Global Options", the interface is set to DHCP4 (no v6), Networkmanager is active.Since the last update suddenly the only interface (RTL8111etcc. PCI Express Gigabit Ethernet Controller) has an IPv6 adresse, which has never been there before.How to get rid of the IPv6 address?Many thanks in advance
    Kind regards

    raspu

  2. #2
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    Default Re: Update - now IPv6 adress on interface

    The setting you describe (DHCP) is only how your network interface obtains its IP address from a DHCP server.

    Unless you explicitly disable, nowadays the system will auto-configure IPv6 addresses in addition to the above which is normal.

    The big question is... Is there a special reason why you would want to, or need to disable IPv6 functionality?

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  3. #3

    Default Re: Update - now IPv6 adress on interface

    Hi!

    Don't get it wrong, but: explanations like "the system nowadays" are nonsense. Some human has decided to give the interfaces IPv6 and normally the interfaces start to send bradcast trash on IPv6 trough my network (and if the router doesn't block them, they will send each and everything wherever they want.

    Plainly: It's a security issue to have interface sending stuff around without control by the user. Nobody need paternalistic decisions "by the system" to increase the attack surface of his systems.

    Please tell me how to disable this in networkmanager (without fiddeling any config files, which will be renewed with every TW update, as for the networkmanager connectivity check, another security issue present in TW, but not in 13.2).

    Many thanks in advance.
    Kind regards

    raspu

  4. #4
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    Default Re: Update - now IPv6 adress on interface

    Hi
    In the /etc/sysctl.conf file does the following line exist?
    Code:
    net.ipv6.conf.all.disable_ipv6 = 1
    In your NetworkManager connection info is ipv6 disabled (per setting)?
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
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  5. #5

    Default Re: Update - now IPv6 adress on interface

    Hi! Many thanks for your reply:

    Quote Originally Posted by malcolmlewis View Post
    Hi
    In the /etc/sysctl.conf file does the following line exist?
    Code:
    net.ipv6.conf.all.disable_ipv6 = 1
    Yepp.

    In your NetworkManager connection info is ipv6 disabled (per setting)?
    Yes, sir.

    Everthing turned off, but still the IPv6, when NetworkManager is on. Have it on all machines updated this week, older ones I would have to look, but it definitely started recently (my son told me: same thing on 42.3, btw...)
    Kind regards

    raspu

  6. #6

    Default Re: Update - now IPv6 adress on interface

    PS: On typical TW I can do

    Code:
    ifconfig
    but one machine gives:

    Code:
    If 'ifconfig' is not a typo.... cnf ifconfig
    and

    Code:
    cnf ifconfig
    wants me to install

    Code:
    zypper install net-tool-deprecated
    weired...

    Code:
    zypper lr
    Repository priorities are without effect. All enabled repositories share the same priority.
    
    # | Alias               | Name                        | Enabled | GPG Check | Refresh
    --+---------------------+-----------------------------+---------+-----------+--------
    1 | openSUSE-20170211-0 | openSUSE-20170211-0         | No      | ----      | ----   
    2 | repo-debug          | openSUSE-Tumbleweed-Debug   | No      | ----      | ----   
    3 | repo-non-oss        | openSUSE-Tumbleweed-Non-Oss | Yes     | (r ) Yes  | Yes    
    4 | repo-oss            | openSUSE-Tumbleweed-Oss     | Yes     | (r ) Yes  | Yes    
    5 | repo-source         | openSUSE-Tumbleweed-Source  | No      | ----      | ----   
    6 | repo-update         | openSUSE-Tumbleweed-Update  | Yes     | (r ) Yes  | Yes
    Kind regards

    raspu

  7. #7
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    Default Re: Update - now IPv6 adress on interface

    Hi
    Not weird at all, ifconfig is deprecated, use ip instead, for this it would be;

    Code:
    ip addr
    Maybe the system(s) have the deprecated tools package, or installed before the change?
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
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    please show your appreciation and click on the star below... Thanks!

  8. #8

    Default Re: Update - now IPv6 adress on interface

    OK, that was that, and how to turn of IPv6 now in NetworkManager? :-)
    Kind regards

    raspu

  9. #9
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    Default Re: Update - now IPv6 adress on interface

    Quote Originally Posted by suse_rasputin View Post
    OK, that was that, and how to turn of IPv6 now in NetworkManager? :-)
    Hi
    Well mine hasn't turned on, still disabled system wide (and on my Leap setups)...

    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
    If you find this post helpful and are logged into the web interface,
    please show your appreciation and click on the star below... Thanks!

  10. #10

    Default Re: Update - now IPv6 adress on interface

    What is the output of

    Code:
    ip addr
    ?

    Are you really still on 42.2?
    Kind regards

    raspu

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