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   zunda (zundan@mastodon.zunda.ninja)'s status on Monday, 18-Nov-2024 08:02:16 JST zunda

   twitter.comさんとx.comさんはサーバ証明書が同一なのがおもしろいよねえSafariさんとかだとTLS切らずにリダイレクトされそうだよねえ

   $ :| openssl s_client -connect x.com:443 -servername x.com 2>/dev/null | openssl x509 -noout -serial
   serial=04E1056104670BD06CDF33A38B67A431
   $ :| openssl s_client -connect twitter.com:443 -servername twitter.com 2>/dev/null | openssl x509 -noout -serial
   serial=04E1056104670BD06CDF33A38B67A431

   って思ったらDNSが微妙に違うw

   $ dig +short x.com
   104.244.42.1
   $ dig +short twitter.com
   104.244.42.1
   104.244.42.65
   104.244.42.193
   104.244.42.129