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Bug 589788 - sys-kernel/genkernel-3.4.52.3 should set CONFIG_IP_NF_NAT by default
Summary: sys-kernel/genkernel-3.4.52.3 should set CONFIG_IP_NF_NAT by default
Status: RESOLVED TEST-REQUEST
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Genkernel Maintainers
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-07-26 23:47 UTC by Sophie Hamilton
Modified: 2016-08-13 23:38 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---


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Description Sophie Hamilton 2016-07-26 23:47:29 UTC
On my AMD64 virtual machine, it seems that when using sys-kernel/genkernel-3.4.52.3 with "genkernel all", it doesn't set the IP_NF_NAT variable by default, nor any of its child items:

> sophie@gentoo-svm ~ $ zcat /proc/config.gz | grep "IP_NF_NAT\|IP_NF_TARGET_\(MASQUERADE\|NETMAP\|REDIRECT\)"
> # CONFIG_IP_NF_NAT is not set

These should probably be set to compile as a module as it causes any attempt to use iptables with the "-t nat" argument to fail with:

> iptables v1.4.21: can't initialize iptables table `nat': Table does not exist (do you need to insmod?)
> Perhaps iptables or your kernel needs to be upgraded.

I don't believe this is intended, but it's possible I'm wrong! I haven't used the older versions; if this is intended, please disregard this bug.

These are the variables that I believe should be set to 'm':

IP_NF_NAT
IP_NF_TARGET_MASQUERADE
IP_NF_TARGET_NETMAP
IP_NF_TARGET_REDIRECT

-----
Portage 2.2.28 (python 3.4.3-final-0, default/linux/amd64/13.0, gcc-4.9.3, glibc-2.22-r4, 4.4.6-gentoo x86_64)
=================================================================
System uname: Linux-4.4.6-gentoo-x86_64-Intel-R-_Core-TM-_i7-5820K_CPU_@_3.30GHz-with-gentoo-2.2
KiB Mem:     4043052 total,   3717212 free
KiB Swap:    2097148 total,   2097148 free
Timestamp of repository gentoo: Mon, 25 Jul 2016 14:30:01 +0000
sh bash 4.3_p42-r1
ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1
app-shells/bash:          4.3_p42-r1::gentoo
dev-lang/perl:            5.20.2::gentoo
dev-lang/python:          2.7.10-r1::gentoo, 3.4.3-r1::gentoo
dev-util/cmake:           3.3.1-r1::gentoo
dev-util/pkgconfig:       0.28-r2::gentoo
sys-apps/baselayout:      2.2::gentoo
sys-apps/openrc:          0.19.1::gentoo
sys-apps/sandbox:         2.10-r1::gentoo
sys-devel/autoconf:       2.69::gentoo
sys-devel/automake:       1.14.1::gentoo, 1.15::gentoo
sys-devel/binutils:       2.25.1-r1::gentoo
sys-devel/gcc:            4.9.3::gentoo
sys-devel/gcc-config:     1.7.3::gentoo
sys-devel/libtool:        2.4.6::gentoo
sys-devel/make:           4.1-r1::gentoo
sys-kernel/linux-headers: 4.3::gentoo (virtual/os-headers)
sys-libs/glibc:           2.22-r4::gentoo
Repositories:

gentoo
    location: /usr/portage
    sync-type: rsync
    sync-uri: rsync://rsync.gentoo.org/gentoo-portage
    priority: -1000

ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=native -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://www.mirrorservice.org/sites/distfiles.gentoo.org/"
LANG="en_GB.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j6"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/var/tmp"
USE="acl amd64 berkdb bindist bzip2 cli cracklib crypt cxx dri fortran gdbm iconv ipv6 mmx mmxext modules multilib ncurses nls nptl openmp pam pcre readline seccomp session sse sse2 ssl tcpd unicode xattr zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx sse sse2" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby20 ruby21" USERLAND="GNU" VIDEO_CARDS="amdgpu fbdev intel nouveau radeon radeonsi vesa dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
Comment 1 Sophie Hamilton 2016-07-26 23:48:59 UTC
...totally forgot to mention this, oops - I'm using sys-kernel/gentoo-sources-4.4.6 as my kernel.
Comment 2 Robin Johnson archtester Gentoo Infrastructure gentoo-dev Security 2016-08-13 23:38:12 UTC
1. The original thinking was that genkernel should be shipping a minimal kernel, targeting desktop usable generally, and thus NAT was excluded. NAT used to be a much larger penalty than it is now, and only used on hosts with routing duties.

2. This is fixed in the 3.5 series, which has other major changes in kernel configuration, to reflect that the world has changed. Please test the 3.5.x series and file bugs for breakages.