Could it be possible OpenBSD doesn't properly deal with the tcp window scaling changes in 2.6.8? (http://lwn.net/Articles/92727/)
On Sat, Aug 21, 2004 at 10:19:29PM -0400, Kristine Diana Daniels wrote: > Package: kernel-image-2.6.8-1-686-smp > Version: 2.6.8-1 > Severity: important > > I have noticed strangeness with the 2.6.8 kernel on both 686-smp > and k7. > 1) rsync from 2.6.8 to a 2.6.7 host hangs. > 2) ssh from 2.6.8 to a 2.6.7 host hangs. > 3) nntp from 2.6.8 hangs for 52 seconds before proceeding. > 4) ssh from Openbsd to 2.6.8 hangs after SSH2_MSG_KEX_DH_GEX_REQUEST > > In 1-2 the network topology is as follows > 2.6.8host <-ethernet-> OpenBSD <-openvpn-> OpenBSD <-ethernet-> 2.6.7host > In 3 the network topology is as follows > 2.6.8host <-ethernet-> OpenBSD <-openvpn-> OpenBSD <-internet-> nntp-server > In 4 the network topology is as follows > 2.6.8host <-ethernet-> OpenBSD > > In all instances OpenBSD is OpenBSD 3.5+Security updates from up to July. > The problem does not exhibit itsself with 2.6.7. > > Attached are tcpdumps taken from openbsd and linux for both 2.6.7 and 2.6.8 > of the conversation for nntp. > tcpdumps for the ssh transactions are available upon request. > Snapshot of /proc/sys/net/ipv4 also available upon request. > > -- System Information: > Debian Release: 3.1 > APT prefers unstable > APT policy: (500, 'unstable'), (500, 'testing') > Architecture: i386 (i686) > Kernel: Linux 2.6.8-1-686-smp > Locale: LANG=en_US, LC_CTYPE=en_US > > Versions of packages kernel-image-2.6.8-1-686-smp depends on: > ii coreutils [fileutils] 5.2.1-2 The GNU core utilities > ii fileutils 5.2.1-2 The GNU file management > utilities > ii initrd-tools 0.1.73 tools to create initrd image for > p > ii module-init-tools 3.1-pre5-6 tools for managing Linux kernel > mo > > -- no debconf information
