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install_easy: speed up DNS check

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bol-van 2021-03-08 16:37:41 +03:00
parent b2b91fa437
commit f66b59af76
1 changed files with 8 additions and 2 deletions
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10
install_easy.sh
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@ -801,7 +801,7 @@ check_dns_spoof()
{
# $1 - domain
# $2 - public DNS
echo $1 | "$EXEDIR/mdig/mdig" --family=4 >"$DNSCHECK_DIG1"
echo $1 | "$EXEDIR/mdig/mdig" --threads=10 --family=4 >"$DNSCHECK_DIG1"
nslookup $1 $2 | sed -n '/Name:/,$p' | grep ^Address | grep -oE '([0-9]{1,3}\.){3}[0-9]{1,3}' >"$DNSCHECK_DIG2"
# check whether system resolver returns anything other than public DNS
grep -qvFf "$DNSCHECK_DIG2" "$DNSCHECK_DIG1"
@ -837,13 +837,19 @@ check_dns()
done
else
echo no working public DNS was found. looks like public DNS blocked.
for dom in $DNSCHECK_DOM; do echo $dom; done | "$EXEDIR/mdig/mdig" --family=4 >"$DNSCHECK_DIGS"
for dom in $DNSCHECK_DOM; do echo $dom; done | "$EXEDIR/mdig/mdig" --threads=10 --family=4 >"$DNSCHECK_DIGS"
fi
echo checking resolved IP uniqueness for : $DNSCHECK_DOM
echo censor\'s DNS can return equal result for multiple blocked domains.
C1=$(wc -l <"$DNSCHECK_DIGS")
C2=$(sort -u "$DNSCHECK_DIGS" | wc -l)
[ "$C1" -eq 0 ] &&
{
echo -- DNS is not working. It's either misconfigured or blocked or you don't have inet access.
check_dns_cleanup
return 1
}
[ "$C1" = "$C2" ] ||
{
echo system dns resolver has returned equal IPs for some domains checked above \($C1 total, $C2 unique\)