Date: Wed, 30 Jan 2019 21:35:44 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 235333] SSH data transmission speed unnecessarily slow due to IPQoS default setting Message-ID: <bug-235333-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D235333 Bug ID: 235333 Summary: SSH data transmission speed unnecessarily slow due to IPQoS default setting Product: Base System Version: 12.0-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Many People Priority: --- Component: conf Assignee: bugs@FreeBSD.org Reporter: tony@accesslab.com On certain connections, for example through some wireless devices, FreeBSD ssh/scp will copy data very slowly. Typically I see copy rates at 1/3 normal speed. This is happening because the IPQoS option for both ssh/scp (ssh_con= fig) and sshd (sshd_config) default the IPQoS setting to 'af21'. Changing this setting to instead default to 'lowdelay' will produce normal data transmiss= ion speeds out-of-the-box for new FreeBSD installs thus making many users happi= er not having to trouble shoot and track down this weird random problem when it occurs. The low speed transmission issue only occurs on some connection pat= hs, mostly I have seen it happen when copying data through a wireless bridge or access point. In hind sight, I see that on Linux, Openssh DOES default IPQo= S =3D lowdelay, and perhaps that is not by accident? --=20 You are receiving this mail because: You are the assignee for the bug.=
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