OpenSSH 4.2_p1 worked fine. did a system update (emerge -avtDNu world). One of the updates was to OpenSSH 4.3_p1. I didn't restart the daemon myself, but I found that all login attemps succeeded but exited immediately, with "fatal: mm_receive_fd: UsePrivilegeSeparation=yes not supported" appearing in syslog. UsePrivilegeSeparation=yes is a _default_ for OpenSSH, I had to explicitly set it to no in the config file before anyone could log in. I'm lucky I leave lots of ssh sessions open since it's a massive hassle to plug a screen and keyboard into the server. I couldn't find any use flags that look relevant, and google only turned up one or two messages related to 3.5 without responses, and a bunch of mirrors. Why can OpenSSH not use its own default option? # emerge info Portage 2.1_pre4-r1 (default-linux/x86/2005.1, gcc-3.4.5, glibc-2.3.6-r3, 2.6.14-gentoo.peladrine i686) ================================================================= System uname: 2.6.14-gentoo.peladrine i686 AMD Duron(tm) Processor Gentoo Base System version 1.12.0_pre16 distcc 2.18.3 i686-pc-linux-gnu (protocols 1 and 2) (default port 3632) [enabled] ccache version 2.4 [enabled] dev-lang/python: 2.3.5, 2.4.2-r1 sys-apps/sandbox: 1.2.17 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1 sys-devel/binutils: 2.16.1-r1 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.11-r3 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -pipe -march=athlon-tbird -maccumulate-outgoing-args -momit-leaf-frame-pointer -mfpmath=387 -mtune=athlon-tbird -fexpensive-optimizations -fmove-all-movables -fomit-frame-pointer -fprefetch-loop-arrays -frerun-cse-after-loop -frerun-loop-opt " CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/share/config /var/bind /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/init.d /etc/env.d" CXXFLAGS="-O2 -pipe -march=athlon-tbird -maccumulate-outgoing-args -momit-leaf-frame-pointer -mfpmath=387 -mtune=athlon-tbird -fexpensive-optimizations -fmove-all-movables -fomit-frame-pointer -fprefetch-loop-arrays -frerun-cse-after-loop -frerun-loop-opt -fvisibility-inlines-hidden" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig ccache distcc distlocks fixpackages sandbox sfperms strict" GENTOO_MIRRORS="http://mirror.pacific.net.au/linux/Gentoo http://mirror.aarnet.edu.au/pub/gentoo/ http://mirror.isp.net.au/pub/gentoo/" MAKEOPTS="-j6" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://mirror.wa.3fl.net/gentoo-portage" USE="3dnow 3dnowext X509 a52 aac acpi aio alsa apache2 apm async atm automount avi bash-completion berkdb big-tables bind-mysql bitmap-fonts buffysize bzip2 bzlib caps cgi cli crypt curl dba dedicated divx4linux djbfft dts dvd eds emboss encode erandom exif extensions fame fastcgi foomaticdb fortran ftp gd gdbm gif glibc-omitfp gnutls gpm gstreamer gtk2 hardenedphp hpn html idn imagemagick imagemajick imlib inifile ipv6 ithreads jpeg junit libg++ libwww linuxthreads-tls logrotate lzo mad math mbox memlimit mhash mikmod mime mjpeg mmap mmx mmxext mod_perl mod_php mp3 mpeg mpm-worker mysql mysqli ncurses nethack network nls nocd nojoystick novideo nptl offensive ogg oggvorbis oss pam pam_chroot pam_console pam_timestamp pcre pdflib perl php png posix pvm python readline samba screen session shared sharedext soap sockets socks5 sse ssl sysfs tcpd threads tokenizer truetype-fonts type1-fonts unicode urandom usb userlocales utf8 vhosts vorbis win32codecs x86 xinetd xml xml2 xmlrpc xsl xvid yv12 zip zlib elibc_glibc kernel_linux userland_GNU" Unset: ASFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, LANG, LC_ALL, LDFLAGS, LINGUAS
erm, what are you using in your config file ? shouldnt it be "UsePrivilegeSeparation yes", not "UsePrivilegeSeparation=yes" ?
run `MAKEOPTS=-j1 emerge openssh >& log` and post the log as an attachment if you're getting that error it's because openssh was unable to detect proper system support for openssh to build in the UsePrivilegeSeparation functionality my first guess is your ridiculous CFLAGS
