On 2022-02-09 15:58, Jaroslaw Rafa wrote:
Dnia  9.02.2022 o godz. 12:58:55 Ralph Seichter pisze:
* Vladimir Mishonov:

> It looks like www.postfix.org is not available if browsing from
> certain locations within Russia and Belarus [...]

The server hosting the Postfix website does not use any type of GeoIP
based blocking. Could Roskomnadzor be involved, perhaps?

And why would Roskomnadzor block access to Postfix website? There's nothing
political on it.

I think it's just a routing misconfiguration at some major ISP. It might be hepful that the OP does a traceroute to www.postfix.org and tells where it
stops.
--
Regards,
   Jaroslaw Rafa
   r...@rafa.eu.org
--
"In a million years, when kids go to school, they're gonna know: once there
was a Hushpuppy, and she lived with her daddy in the Bathtub."

When a website is blocked by the Russian government, trying to open it usually redirects to a special "website blocked" page served by the local ISP (with the exception of HTTPS sites, but this is not the case here). But instead of that, the connection just times out - more often than not, this indicates a problem somewhere further towards the remote side.

I can only do the traceroute from my local machine, since I don't have access to any remote machines where this problem manifests. It stops returning meaningful results right after the IP that seems to belong to my ISP, which is a bit strange - this is most certainly not a local problem, considering the availability test results (https://ping-admin.com/free_test/result/16443944516w2j65r1y4j0kca10wdw3q.html) and also that at least one other user here (Kirill Bychkov) has confirmed it too.

player701@player701server:~ % traceroute -m 10 www.postfix.org
traceroute to postfix-mirror.horus-it.com (65.108.3.114), 10 hops max, 40 byte packets
 1  192.168.0.1 (192.168.0.1)  0.601 ms  0.436 ms  0.274 ms
 2  95.46.224.1 (95.46.224.1)  2.869 ms  1.036 ms  0.789 ms
 3  178.219.45.253 (178.219.45.253)  0.731 ms  60.934 ms  1.402 ms
 4  * * *
 5  * * *
 6  * * *
 7  * * *
 8  * * *
 9  * * *
10  * * *

---
Kind regards,
Vladimir

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