Throughput on WAN took a noose dive back in Dec

[nullspace]

So my WAN down and up started to tank sometime in december and all I can think is an update caused it. Today I had some time and tweaked the MTU a little with middling to no change:

ersion   Date   
26.1.5 (installed)   2026-03-24   
26.1.4   2026-03-11   
26.1.3   2026-03-04   
26.1.2   2026-02-12   
26.1.1   2026-02-04   
26.1   2026-01-28   
25.7.11   2026-01-15   
25.7.10   2025-12-18   
25.7.9   2025-12-04   
25.7.8   2025-11-26   
25.7.7   2025-11-06   
25.7.6   2025-10-22   
25.7.5   2025-10-08   
25.7.4   2025-09-30   
25.7.3   2025-09-09


Timestamp (GMT)   Server id   Server name   Download   Upload   Latency
2026-03-26T16:40:47   69076   Ripplefiber, Detroit, MI   154.27   119.56   34.63
2026-03-26T16:39:46   53778   123NET, Southfield, MI   321.78   162.60   23.07
2026-03-26T16:39:26   53778   123NET, Southfield, MI   427.84   150.26   18.03
2026-03-26T16:30:47   53778   123NET, Southfield, MI   303.88   158.49   23.59
2026-03-26T16:30:18   69076   Ripplefiber, Detroit, MI   175.65   118.15   35.37
2026-03-26T15:55:38   69076   Ripplefiber, Detroit, MI   282.70   66.56   46.06
2026-03-26T15:54:56   53778   123NET, Southfield, MI   309.22   197.95   22.45
2026-03-26T15:18:56   53778   123NET, Southfield, MI   298.12   178.34   31.09
2026-03-26T15:12:58   15342   Jefferson County Cable, Toronto, OH   532.03   87.85   81.72
2026-03-26T15:09:05   69076   Ripplefiber, Detroit, MI   337.01   80.93   33.71
2026-03-26T15:08:41   69076   Ripplefiber, Detroit, MI   269.19   96.78   36.84
2026-03-26T14:56:52   69076   Ripplefiber, Detroit, MI   147.98   103.90   31.88
2026-03-26T14:56:14   69076   Ripplefiber, Detroit, MI   258.65   82.40   33.43
2026-03-26T14:48:14   69076   Ripplefiber, Detroit, MI   132.60   117.18   39.13
2026-03-26T14:12:39   73050   Omni Fiber, Detroit, MI   135.47   69.68   62.72
2026-03-26T13:59:46   73050   Omni Fiber, Detroit, MI   156.37   80.17   50.09
2026-03-26T13:56:54   69076   Ripplefiber, Detroit, MI   207.24   98.28   45.51
2026-03-26T13:53:49   25491   Cable Co-op, Oberlin, OH   43.46   5.73   1035.91
2026-03-25T11:43:25   16973   Spectrum, Livonia, MI   193.45   98.21   46.64
2026-03-25T11:42:35   74288   EZEE Fiber, Detroit, MI   144.72   96.05   61.52
2026-03-25T11:42:05   5709   Merit Network, Inc, Ann Arbor, MI   288.97   93.82   70.66
2026-03-25T11:41:17   71374   Wyandotte Municipal Services, Wyandotte, MI   310.37   120.34   49.01
2025-12-28T14:45:18   6124   Merit Network, Inc, Southfield, MI   306.94   94.94   64.64
2025-12-13T14:27:32   1778   Comcast, Detroit, MI   517.04   191.64   43.55
2025-12-13T14:26:55   64415   Surf Internet, Southfield, MI   144.70   100.25   55.62
2025-07-12T20:47:45   1778   Comcast, Detroit, MI   1846.12   260.60   13.40
2025-06-28T09:38:00   53778   123NET, Southfield, MI   1472.07   346.66   14.02
2025-06-28T09:36:58   1778   Comcast, Detroit, MI   2310.24   351.93   13.62
2025-06-20T14:30:56   1778   Comcast, Detroit, MI   2304.69   349.62   13.60
2025-06-06T16:46:48   69076   Ripplefiber, Detroit, MI   2144.83   317.85   31.49
2025-06-06T16:45:58   6124   Merit Network, Inc, Southfield, MI   2204.34   347.66   26.89
2025-06-06T16:45:21   1778   Comcast, Detroit, MI   2279.34   352.00   13.46
2025-05-28T14:58:20   1778   Comcast, Detroit, MI   2311.01   339.32   13.22
2025-04-20T20:51:52   53778   123NET, Southfield, MI   1252.25   314.12   9.47
2025-04-20T20:47:59   1778   Comcast, Detroit, MI   2017.36   351.83   14

[pfry]

The difference is significant, but not on an obvious (bandwidth) boundary. A rather asymmetric service... DOCSIS? Comcast? I'd expect a (more) symmetric offering these days.

Not much to go on. Start by characterizing performance through the firewall (that is not clear here), then (as necessary) without it, watching for errors and/or packet loss.