Re: [gentoo-user] Re: Disable IPv6 on an interface?
Grant Edwards wrote: On 2012-01-17, Paul Hartman paul.hartman+gen...@gmail.com wrote: On Tue, Jan 17, 2012 at 9:48 AM, Grant Edwards grant.b.edwa...@gmail.com wrote: How does one disable IPv6 for a particular interface? I want eth2 up but with no IP address. ?Just doing an ifconfig eth2 up worked fine until I enabled IPv6 support in the kernel. ?Now I get a link-local IPv6 address just by bringing the interface up -- and I don't want one. Google has found me the anser for Debian, but for Gentoo all it found was somebody else asking the qeustion (with no answers). I didn't try it myself, but what about sysctl? net.ipv6.conf.eth0.disable_ipv6=1 or something like that... That does it! The next question is what do I put in the Gentoo network configuration file (/etc/conf.d/net) to get that result (eth2 up with no IP addresses). /etc/sysctl.conf net.ipv6.conf.eth0.disable_ipv6=1 It may be sufficient to just use: net.ipv6.conf.eth0.autoconf=0 net.ipv6.conf.eth0.accept_ra=0 I'm just guessing that .autoconf corresponds to link-local addresses, though.
Re: [gentoo-user] Re: Disable IPv6 on an interface?
On Jan 17, 2012 11:56 PM, Grant Edwards grant.b.edwa...@gmail.com wrote: On 2012-01-17, Paul Hartman paul.hartman+gen...@gmail.com wrote: On Tue, Jan 17, 2012 at 9:48 AM, Grant Edwards grant.b.edwa...@gmail.com wrote: How does one disable IPv6 for a particular interface? I want eth2 up but with no IP address. ?Just doing an ifconfig eth2 up worked fine until I enabled IPv6 support in the kernel. ?Now I get a link-local IPv6 address just by bringing the interface up -- and I don't want one. Google has found me the anser for Debian, but for Gentoo all it found was somebody else asking the qeustion (with no answers). I didn't try it myself, but what about sysctl? net.ipv6.conf.eth0.disable_ipv6=1 or something like that... That does it! The next question is what do I put in the Gentoo network configuration file (/etc/conf.d/net) to get that result (eth2 up with no IP addresses). You don't. Put it in /etc/sysctl.conf instead. Rgds,
Re: [gentoo-user] Re: Disable IPv6 on an interface?
On Tue, Jan 17, 2012 at 11:50 AM, Grant Edwards grant.b.edwa...@gmail.com wrote: After putting the above line in sysctl.conf (and removing my preup() function), everything worked as expected except that I had to manually start the interface with the command /etc/init.d/net.eth2 start. Google told me to fix that by using rc-update to add net.eth2 to the default runlevel. Everything's tickety-boo now, but I don't remember have to do that last step in the past when I added a network interface -- all I had to do was create the symlink from net.whatever to net.lo. Is the rc-update runlevel stuff new? AFAIR you've had to do it that way forever... but it's not exactly something I set up every day. Maybe if you used ifplugd, wicd, networkmanager etc. it works differently.
