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HAS_XOIP(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:40.107.0.0/17]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[netapp.com]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.05)[-0.054,0]; RCVD_COUNT_THREE(0.00)[3]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; DKIM_TRACE(0.00)[netapp.onmicrosoft.com:+]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[55.80.107.40.list.dnswl.org : 127.0.3.0]; SUBJ_ALL_CAPS(0.38)[5]; MX_GOOD(-0.01)[mx1.netapp.iphmx.com,mx2.netapp.iphmx.com,mx1.netapp.iphmx.com,mx2.netapp.iphmx.com,mx1.netapp.iphmx.com,mx2.netapp.iphmx.com,mx1.netapp.iphmx.com,mx2.netapp.iphmx.com,mx1.netapp.iphmx.com,mx2.netapp.iphmx.com,mx1.netapp.iphmx.com,mx2.netapp.iphmx.com,mx1.netapp.iphmx.com,mx2.netapp.iphmx.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:8075, ipnet:40.64.0.0/10, country:US]; IP_SCORE(-0.89)[ipnet: 40.64.0.0/10(-2.18), asn: 8075(-2.21), country: US(-0.07)] X-BeenThere: freebsd-transport@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussions of transport level network protocols in FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 23 Feb 2019 09:29:55 -0000 Hi, A colleague pointed me to the stack (HEAD) no longer emitting DSACK options= a few days ago... I was under the impression, that older versions of FreeBSD would send out D= SACKs for spurious duplicate packets. But when I try this script against HEAD, regular cumulative ACKs without DS= ACK blocks are showing up. Currently bandwidth starved - but was that a conscious decision? Or was me = observing DSACKs never a thing? Thanks a lot, Richard