Unable to access Vercel servers from home Internet connection

Help
1

This is related to @zbycz’s issues, but since my traceroute output is very different, I though it best to create my own thread here, as recommended by @pawlean .

Info from ipinfo.io:

{
  "ip": "178.255.168.23",
  "hostname": "nat-23.starnet.cz",
  "city": "Prague",
  "region": "Prague",
  "country": "CZ",
  "loc": "50.0880,14.4208",
  "org": "AS44489 STARNET, s.r.o.",
  "postal": "110 00",
  "timezone": "Europe/Prague",
  "readme": "https://ipinfo.io/missingauth"
}

Lookup of vercel.com:

# host vercel.com
vercel.com has address 76.76.21.22
vercel.com has address 76.76.21.164

TCP traceroutes:

# sudo traceroute -T -p 443 76.76.21.22
traceroute to 76.76.21.22 (76.76.21.22), 30 hops max, 60 byte packets
 1  _gateway (10.0.1.1)  1.390 ms  1.357 ms  1.344 ms
 2  10.43.238.97 (10.43.238.97)  9.826 ms  9.813 ms  9.803 ms
 3  100.100.115.254 (100.100.115.254)  10.627 ms  10.616 ms  10.605 ms
 4  cust-starnet.supernetwork (88.86.97.209)  10.592 ms  10.579 ms cust-starnet.supernetwork.cz (88.86.97.137)  9.756 ms
 5  151.148.13.110 (151.148.13.110)  9.679 ms * *
 6  * 150.222.81.25 (150.222.81.25)  15.903 ms *
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# sudo traceroute -T -p 443 76.76.21.164
traceroute to 76.76.21.164 (76.76.21.164), 30 hops max, 60 byte packets
 1  _gateway (10.0.1.1)  1.388 ms  1.355 ms  1.345 ms
 2  10.43.238.97 (10.43.238.97)  11.630 ms  11.569 ms  11.561 ms
 3  100.100.115.254 (100.100.115.254)  11.497 ms  11.680 ms *
 4  cust-starnet.supernetwork.cz (88.86.97.137)  11.526 ms  11.517 ms cust-starnet.supernetwork (88.86.97.209)  11.508 ms
 5  151.148.13.110 (151.148.13.110)  11.500 ms * *
 6  150.222.81.31 (150.222.81.31)  11.603 ms * *
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2

Hi, @dvdkon!

Could you also just follow the steps outlined in Resolving IP Blocking Issues?

3

Hi, I’ve looked at those instructions before. I’m certain this is not a problem with my device(s). Given the traceroute output above ends with an AWS IP address, it also seems to not be a straightforward block from my ISP (which another customer has already confirmed in a GitHub issue), but I can’t rule out some other problem on their part.

At this point, I feel I’ve exhausted my possibilities. If there’s anything more specific that you think I should try, please tell me.

4

Thanks for your patience, @dvdkon!

I’ll raise this internally.

5

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