Bug 1966

Summary:	Copy DSCP field from request to response packets
Product:	Portable OpenSSH	Reporter:	martin ➬ <bugzilla.mindrot.org>
Component:	sshd	Assignee:	Assigned to nobody <unassigned-bugs>
Status:	NEW ---
Severity:	normal	CC:	djm
Priority:	P2
Version:	5.9p1
Hardware:	All
OS:	All
URL:	http://bugs.debian.org/652539

Description martin ➬ 2011-12-18 22:20:32 AEDT

sshd seems to ignore the DSCP field in packets sent by clients. I think it would be sensible if it copied the DSCP field to its response packets, though maybe it would make sense to be able to override this in the configuration, e.g.

  IPQoSResponse nodelay throughput   (the default)
  IPQoSResponse copy throughput      (copy from client packet for interactive sessions)
  …

Comment 1 Damien Miller 2012-02-24 11:29:04 AEDT

How would sshd find out the TOS/DSCP of the incoming packets? On most platforms IP_TOS is write-only...