I've posted a couple of time about large drops in SamKnows "speedtest" speeds usually at peak times (19:00 to 21:00) - see this forum and Linux forum. Five days ago (at 09:36:34 according to my log) my IP address changed from 126.96.36.199 (gateway not known) to 188.8.131.52 on gateway ptn-bng01, and the Samknows tests have changed markedly (see first 14 day hourly plot below). Before - speed steady apart from large drops (up to 50Mb/s), very much time dependent After - speed varying by around 4Mb/s, much less time dependent Looking back, the previous IP change (from 184.108.40.206 ) was 23 Dec and the change was in reverse (see second image, 14 days centred on 23rd). Obviously, not possible to tell the actual reason for the changes as there are too many unknowns (speedtest host, routing, BT/Plusnet maintenance etc.) but....... Phil Note: GRC reports "full stealth" for my system
Plusnet Fibre (Sep 2014), Essentials (Feb 2013); ADSL (Apr 2009); Customer since Jan 2004 (on 28kb dial-up) Using a TP-Link TD-W9980 modem-router.