某DNSプロパイダインスパイアの金盾確認コマンド

value-domain.sh

#!/bin/sh
#
# usage: value-domain example.com
#
# tests if the domain is blocked by the great firewall
#
# Copyright 2022 zunda <zundan at gmail.com>
#
# Permission is granted for use, copying, modification, distribution,
# and distribution of modified versions of this work as long as the
# above copyright notice is included.
#
if [ -z "$1" ]; then
  echo usage: value-domain example.com
  exit 1
fi

if dig @8.8.8.8 +timeout=1 $1 > /dev/null 2>&1;
then
  if dig @123.123.123.1 +timeout=1 $1 > /dev/null 2>&1;
  then
    echo blocked
  else
    echo not blocked
  fi
else
  echo not exist
fi