1) First I'll have to rebuild my kernel with IPV6 support and reboot?
Yes. You'll also need to enable the appropriate IPv6 netfilter options in your kernel.
2) I don't see the ip6tables binary anywhere on my system. Do I simply set +ipv6 in USE in /etc/make.conf and then run emerge --ask --deep --newuse --world
That seems like it should suffice.
4) Do all USE options default to "-", i.e. off, if not explicitly specified?
No. There's a use.defaults file in your profile directory (such as /usr/portage/profiles/default-linux/x86/2005.0/, or whatever profile you're using) that contains a default set of USE flags. You could also set USE="-* whatever you want" in your /etc/make.conf but I think that's not very safe if you're not careful. (I've not had problems with it. *shrug*)
5) I noticed some other USE options I want to change, having used Gentoo for a few months now. Are there potential problems with changing several USE options at once, other than a longer emerge --newuse<g> ?
None that I'm aware of. You should run a `revdep-rebuild` afterward just to be safe though. It's part of the app-portage/gentoolkit package.
Hope that helps. -- () The ASCII Ribbon Campaign - against HTML Email, /\ vCards, and proprietary formats. --------------------------------------------------- Peter A. Gordon (codergeek42) E-Mail: [EMAIL PROTECTED] GPG Public Key ID: 0x109DBECE GPG Key Fingerprint (SHA1): E485 E2F7 11CE F9B2 E3D9 C95D 208F B732 109D BECE Encrypted and/or Signed correspondence preffered. GPG Public Key available upon request or from pgp.mit.edu's public key server. ---------------------------------------------------
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