Наблюдаю блокировку запросов к google.com для некоторых ip адресов сети google:
nslookup google.com
Server: 8.8.8.8
Address: 8.8.8.8#53
Non-authoritative answer:
Name: google.com
Address: 172.217.23.206
Name: google.com
Address: 2a00:1450:400e:811::200e
Работает только www.google.com, запросы со всем другими SNI блокируются при обращении к этому IP:
~# curl -4ko /dev/null https://google.com/ --connect-timeout 5 --connect-to ::172.217.23.206
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- 0:00:05 --:--:-- 0
curl: (28) SSL connection timeout
~# curl -4ko /dev/null https://www.google.com/ --connect-timeout 5 --connect-to ::172.217.23.206
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 21484 0 21484 0 0 80887 0 --:--:-- --:--:-- --:--:-- 81071
~# curl -4ko /dev/null https://vk.com/ --connect-timeout 5 --connect-to ::172.217.23.206
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- 0:00:05 --:--:-- 0
curl: (28) SSL connection timeout
~# curl -4ko /dev/null https://www.google.ru/ --connect-timeout 5 --connect-to ::172.217.23.206
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- 0:00:05 --:--:-- 0
curl: (28) SSL connection timeout
~# curl -4ko /dev/null https://google.ru/ --connect-timeout 5 --connect-to ::172.217.23.206
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- 0:00:05 --:--:-- 0
curl: (28) SSL connection timeout
~# curl -4ko /dev/null https://play.google.com/ --connect-timeout 5 --connect-to ::172.217.23.206
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- 0:00:04 --:--:-- 0
curl: (28) SSL connection timeout
Соседний IP работает:
~# curl -4ko /dev/null https://google.com/ --connect-timeout 5 --connect-to ::172.217.23.196
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 220 100 220 0 0 1052 0 --:--:-- --:--:-- --:--:-- 1057
~# curl -4ko /dev/null https://www.google.com/ --connect-timeout 5 --connect-to ::172.217.23.196
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 21538 0 21538 0 0 81888 0 --:--:-- --:--:-- --:--:-- 81893
Провайдер проводной МТС