The Precise Pangolin has reached end of life, so this bug will not be fixed for that release
** Changed in: openssh (Ubuntu Precise) Status: Triaged => Won't Fix -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/1067522 Title: openssh-client / ssh does not set IP Type-of-service field Status in openssh package in Ubuntu: Fix Released Status in openssh source package in Precise: Won't Fix Status in openssh package in Debian: Fix Released Bug description: The openssh-client bundled with Ubuntu 12.04 fails to set the IP Type of Service field to "minimize delay (0x10)" for interactive SSH sessions. Just about any other flavor of Linux/UNIX does this without any trouble. Even if I attempt to force the setting in /etc/ssh/sshd_config: IPQoS lowdelay The outgoing SSH packets do not have the bit set. See this example with tcpdump output: [steve.polyack@galvatron ~]$ sudo tcpdump -i eth0 -vvv -tttt -n 'host 2.2.2.2 && dst port 22' tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes ^Z [1]+ Stopped sudo tcpdump -i eth0 -vvv -tttt -n 'host 2.2.2.2 && dst port 22' [steve.polyack@galvatron ~]$ bg [1]+ sudo tcpdump -i eth0 -vvv -tttt -n 'host 2.2.2.2 && dst port 22' & [steve.polyack@galvatron ~]$ ssh 2.2.2.2 2012-10-16 17:20:39.113321 IP (tos 0x0, ttl 64, id 58664, offset 0, flags [DF], proto TCP (6), length 60) 1.1.1.1.36127 > 2.2.2.2.22: Flags [S], cksum 0x2dd5 (incorrect -> 0x200d), seq 3930407303, win 14600, options [mss 1460,sackOK,TS val 1670554799 ecr 0,nop,wscale 7], length 0 2012-10-16 17:20:39.298676 IP (tos 0x0, ttl 64, id 58665, offset 0, flags [DF], proto TCP (6), length 52) 1.1.1.1.36127 > 2.2.2.2.22: Flags [.], cksum 0x2dcd (incorrect -> 0x5cd6), seq 3930407304, ack 1359170341, win 115, options [nop,nop,TS val 1670554846 ecr 2310866035], length 0 2012-10-16 17:20:39.329979 IP (tos 0x0, ttl 64, id 58666, offset 0, flags [DF], proto TCP (6), length 52) 1.1.1.1.36127 > 2.2.2.2.22: Flags [.], cksum 0x2dcd (incorrect -> 0x5c8c), seq 0, ack 40, win 115, options [nop,nop,TS val 1670554853 ecr 2310866063], length 0 2012-10-16 17:20:39.330082 IP (tos 0x0, ttl 64, id 58667, offset 0, flags [DF], proto TCP (6), length 91) 1.1.1.1.36127 > 2.2.2.2.22: Flags [P.], cksum 0x2df4 (incorrect -> 0x9e6b), seq 0:39, ack 40, win 115, options [nop,nop,TS val 1670554853 ecr 2310866063], length 39 2012-10-16 17:20:39.759001 IP (tos 0x0, ttl 64, id 58668, offset 0, flags [DF], proto TCP (6), length 1324) 1.1.1.1.36127 > 2.2.2.2.22: Flags [P.], cksum 0x32c5 (incorrect -> 0x916a), seq 39:1311, ack 776, win 126, options [nop,nop,TS val 1670554961 ecr 2310866492], length 1272 The problem persists even after login, once the SSH session is fully interactive: 2012-10-16 17:20:49.626239 IP (tos 0x0, ttl 64, id 58694, offset 0, flags [DF], proto TCP (6), length 116) 1.1.1.1.36127 > 2.2.2.2.22: Flags [P.], cksum 0x2e0d (incorrect -> 0xb06e), seq 3479:3543, ack 5344, win 226, options [nop,nop,TS val 1670557427 ecr 2310876270], length 64 This causes problems in environements where QoS is used and IP ToS is obeyed. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: openssh-client 1:5.9p1-5ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21 Uname: Linux 3.2.0-27-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.0.1-0ubuntu13 Architecture: amd64 Date: Tue Oct 16 17:14:19 2012 InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1) ProcEnviron: LANGUAGE=en_US:en TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash RelatedPackageVersions: ssh-askpass N/A libpam-ssh N/A keychain N/A ssh-askpass-gnome 1:5.9p1-5ubuntu1 SSHClientVersion: OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012 SourcePackage: openssh UpgradeStatus: Upgraded to precise on 2012-07-06 (102 days ago) modified.conffile..etc.ssh.ssh.config: [modified] mtime.conffile..etc.ssh.ssh.config: 2012-10-05T09:52:10.902327 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1067522/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp