On Fri, Oct 12, 2018 at 04:35:17PM -0500, goli...@dyne.org wrote:
> Thanks for the responses. I suspect that IPv6 might indeed be the culprit.

I doubt it, since both traceroutes are using IPv4, and both have odd delays.

> $ traceroute google.com
> traceroute to google.com (74.125.129.102), 30 hops max, 60 byte packets
>  1  * * *
>  2  tge0-0-0.ausdtx2802h.texas.rr.com (66.68.2.205)  45.543 ms  46.092 ms
> 46.373 ms
>  3  agg30.ausxtxir02r.texas.rr.com (24.175.42.144)  24.660 ms  25.364 ms
> 25.750 ms
>  4  agg22.hstqtxl301r.texas.rr.com (24.175.41.48)  31.765 ms  36.379 ms
> 35.651 ms
>  5  ae-1-0.p0.atl90.tbone.rr.com (66.109.1.218)  50.802 ms  44.462 ms
> 39.178 ms
>  6  bu-ether12.dllstx976iw-bcr00.tbone.rr.com (66.109.6.39)  45.106 ms
> 34.283 ms 107.14.19.49 (107.14.19.49)  36.338 ms
>  7  0.ae1.pr1.dfw10.tbone.rr.com (107.14.17.234)  35.058 ms
> 0.ae2.pr1.dfw10.tbone.rr.com (107.14.17.236)  27.868 ms  25.589 ms
>  8  ix-ae-23-0.tcore2.dt8-dallas.as6453.net (66.110.57.97)  32.475 ms
> 39.941 ms  52.998 ms
>  9  74.125.50.214 (74.125.50.214)  31.421 ms  34.253 ms  38.467 ms
> 10  * * *
> 11  216.239.63.238 (216.239.63.238)  34.677 ms 108.170.226.56
> (108.170.226.56)  29.073 ms 108.170.226.182 (108.170.226.182)  29.651 ms
> 12  108.170.240.145 (108.170.240.145)  29.667 ms 108.170.240.209
> (108.170.240.209)  32.095 ms 108.170.252.130 (108.170.252.130)  34.320 ms
> 13  216.239.59.168 (216.239.59.168)  29.987 ms 108.170.233.117
> (108.170.233.117)  30.326 ms 108.170.228.84 (108.170.228.84)  31.091 ms
> 14  209.85.250.37 (209.85.250.37)  30.081 ms  38.277 ms  35.229 ms
> 15  209.85.246.182 (209.85.246.182)  56.902 ms 209.85.246.84 (209.85.246.84)
> 77.541 ms 209.85.246.182 (209.85.246.182)  73.471 ms

Looks to me like dropped packets start around here:

> 16  216.239.56.175 (216.239.56.175)  63.061 ms 216.239.54.65 (216.239.54.65)
> 61.564 ms 216.239.48.67 (216.239.48.67)  65.893 ms
> 17  * * *
> 18  * * *
> 19  * * *
> 20  * * *
> 21  * * *
> 22  * * *
> 23  * * *
> 24  * * *
> 25  * * *
> 26  * * *
> 27  jm-in-f102.1e100.net (74.125.129.102)  168.457 ms  171.191 ms  170.337
> ms
> 

I reproduced the above traceroute to the same IP, and am seeing
similar results, even though my packets took a different route from
yours. This suggests it could be a problem with that particular IP.

> Good grief!!!  Another trace route eventually got to one of my websites:
> 
> $ traceroute stopcta.info
> traceroute to stopcta.info (185.203.114.117), 30 hops max, 60 byte packets
>  1  * * *
>  2  tge0-0-0.ausdtx2801h.texas.rr.com (66.68.2.201)  330.761 ms  331.380 ms
> 331.773 ms
>  3  agg30.ausutxla01r.texas.rr.com (24.175.42.142)  25.345 ms  26.732 ms
> 27.302 ms
>  4  agg22.dllatxl301r.texas.rr.com (24.175.41.46)  37.000 ms  33.044 ms
> 37.558 ms
>  5  bu-ether14.dllstx976iw-bcr00.tbone.rr.com (66.109.6.88)  41.860 ms
> 66.109.1.216 (66.109.1.216)  40.157 ms  41.325 ms
>  6  66.109.5.121 (66.109.5.121)  31.192 ms  42.090 ms  25.595 ms
>  7  dls-b21-link.telia.net (62.115.156.208)  27.346 ms  28.104 ms  27.084 ms
>  8  atl-b22-link.telia.net (80.91.246.74)  49.968 ms  58.985 ms  49.461 ms
>  9  mai-b1-link.telia.net (62.115.122.53)  69.445 ms  67.043 ms  59.106 ms
> 10  init7-ic-318278-mai-b1.c.telia.net (62.115.148.55)  70.009 ms  77.143 ms
> 72.151 ms
> 11  r2nyc3.core.init7.net (193.47.153.231)  71.850 ms  70.682 ms  78.191 ms
> 12  r1nyc3.core.init7.net (193.47.153.238)  80.221 ms  73.209 ms  69.531 ms
> 13  r1nyc2.core.init7.net (193.47.153.234)  84.886 ms  74.355 ms  70.098 ms

A rather large delay seems to start here:

> 14  r1lon2.core.init7.net (77.109.128.14)  140.249 ms  140.124 ms  147.072
> ms
> 15  r1bsl1.core.init7.net (77.109.128.102)  173.037 ms  162.066 ms  164.498
> ms
> 16  r1zrh2.core.init7.net (77.109.128.129)  159.150 ms  152.605 ms
> r1bsl3.core.init7.net (82.197.168.18)  160.159 ms
> 17  r1glb1.core.init7.net (77.109.128.238)  165.343 ms r1zrh8.core.init7.net
> (82.197.168.74)  155.252 ms r1glb1.core.init7.net (77.109.128.238)  171.133
> ms
> 18  empty.init7.net (77.109.141.139)  159.961 ms  156.963 ms  165.937 ms
> 19  * r1glb1.core.init7.net (77.109.140.205)  156.057 ms  159.736 ms
> 20  empty.init7.net (77.109.141.139)  165.136 ms
> 117-114-203-185.place5.ungleich.ch (185.203.114.117)  169.960 ms
> empty.init7.net (77.109.141.139)  161.785 ms
> 
> I (or rather Evilham and Nico) recently moved my websites to a devuan IPv6
> VPS which is set up to serve IPv4 too through some sort of server-side magic
> I don't really understand. I suspect this might be what triggered
> things.

It's possible. I reproduced this traceroute also, and am seeing the
large delay as well. This suggests that everything is fine with your
home network, as well as your ISP.

> I
> am clueless how to test if IPv6 is actually enabled on my network or how to
> disable it if it is.

If you've disabled IPv6 already, you'll need to enable it again
first. Then, use traceroute6 (which actually just calls traceroute
with the -6 flag), like:

traceroute6 google.com

There are other ways of course, but that's probably the simplest. If
you have IPv6, the traceroute will have output similar to what you
posted, but with IPv6 addresses. If you don't have IPv6, it will just
fail from the start.


Greg


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