I try to login to a remote host using kerberized ssh but I get the error: .ssh/config: line 4: Bad configuration option: GSSAPIKeyExchange .ssh/config: terminating, 1 bad configuration options Reproducible: Always Contents of my .ssh/config: --- Host *.domain GSSAPIAuthentication yes GSSAPIDelegateCredentials yes GSSAPIKeyExchange yes PreferredAuthentications gssapi-keyx,gssapi-with-mic --- emerge --info --- Portage 2.1.10.65 (default/linux/amd64/10.0/no-multilib, gcc-4.5.3, glibc-2.14.1-r3, 3.3.8-gentoo x86_64) ================================================================= System uname: Linux-3.3.8-gentoo-x86_64-Intel-R-_Core-TM-2_CPU_6400_@_2.13GHz-with-gentoo-2.1 Timestamp of tree: Thu, 26 Jul 2012 09:30:01 +0000 app-shells/bash: 4.2_p20 dev-lang/python: 2.7.3-r2, 3.2.3 dev-util/cmake: 2.8.7-r5 dev-util/pkgconfig: 0.26 sys-apps/baselayout: 2.1-r1 sys-apps/openrc: 0.9.8.4 sys-apps/sandbox: 2.5 sys-devel/autoconf: 2.13, 2.68 sys-devel/automake: 1.11.1 sys-devel/binutils: 2.21.1-r1 sys-devel/gcc: 4.5.3-r2 sys-devel/gcc-config: 1.6 sys-devel/libtool: 2.4-r1 sys-devel/make: 3.82-r1 sys-kernel/linux-headers: 3.1 (virtual/os-headers) sys-libs/glibc: 2.14.1-r3 Repositories: gentoo ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=core2 -O2 -pipe" CHOST="x86_64-pc-linux-gnu" ... ---
not a security bug. you're trying to use a ssh config option your ssh client doesn't support.