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On Tuesday 30 Dec 2014 10:10:04 Zesen Qian wrote: |
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> Mick <michaelkintzios@×××××.com> writes: |
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> > On Tuesday 30 Dec 2014 03:27:34 Zesen Qian wrote: |
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> >> Hello list, |
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> >> Sorry for hijacking Rich's thread, resend here. |
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> >> I want to disable IPv6 on an certain interface, a simple google |
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> >> tell me to add one line to /etc/sysctl.d/local.conf |
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> >> net.ipv6.conf.enp4s0.disable_ipv6=1 |
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> >> Simple enough, but the problem I have is that both ipv6 and the |
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> >> dirver of the network card(tg3) is loaded by modules. They 're not |
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> >> loaded when the service sysctl is started, so there's no entry |
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> >> named "net.ipv6.conf.enp4s0", which make sysctl not working. |
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> >> So my question is that, is there any way to disable IPv6 on |
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> >> specific interface, as early as I can? I want to make it early |
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> >> because I don't want to receive any RA to mess up my route table. |
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> >> I guess just adding sysctl to preup() in /etc/conf.d/net should do |
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> >> the trick, but may I make it earlier? |
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> >> Any comment is appreciated. |
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> > |
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> > Unless the kernel knows of the enp4s0 interface and therefore lists it |
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> > under sysctl, I can't see how it can be disabled. You could try |
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> > disabling IPv6 altogether in the kernel, but this may not be what you |
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> > want to achieve. |
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> > |
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> > Alternatively, have a look with modinfo in the module options in the |
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> > unlikely chance that the module has some option which disables IPv6 |
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> > functionality. |
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> |
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> Hello Mick, |
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> The module ipv6 has only three parameters, each of which is "disable |
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> ipv6", "disable ipv6 on all interfaces", "disable autoconf on all |
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> interfaces", none of these is what I want to achieve. |
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Right, I didn't think that you would want to disable IPv6 completely, but |
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mentioned it for completeness. |
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> Module tg3 has |
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> only on parameters which control the debug level. |
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Yes, I thought it unlikely that a hardware driver would be used to configure |
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IPv6, but it was worth checking. |
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> Currently I just call "sysctl net.ipv6.conf.enp4s0.disable_ipv6=1" in |
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> preup(), which works just fine. I 'm just wondering if there 's some |
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> more "proper" way to do it. Since in my opinion, this should be done at |
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> the first moment when the interface is present, not when the interface |
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> is up. |
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I'm afraid I don't know of any other way to do it. |
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-- |
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Regards, |
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Mick |
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