From cd759e469d716bbe7db8c95329d67407370c2060 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A1ndor?= <sandros@noreply.localhost>
Date: Mon, 26 Feb 2024 00:30:38 +0100
Subject: [PATCH] use custom dns

---
 check_ptr.sh | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/check_ptr.sh b/check_ptr.sh
index c641ef7..b34ba1e 100644
--- a/check_ptr.sh
+++ b/check_ptr.sh
@@ -10,14 +10,16 @@ if [[ $# -ne 1 ]]; then
     exit 1
 fi
 
+DNS="84.2.44.1"
+
 # Get IPs
-IPS="$(dig +short $1 A | sort -u) $(dig +short $1 AAAA | sort -u)"
+IPS="$(dig +short $1 A @$DNS | sort -u) $(dig +short $1 AAAA @$DNS | sort -u)"
 
 # Loop through IPs
 fails=0
 for IP in $IPS; do
         # Performs the actual lookup against blacklists
-        RESULT=$(host $IP | rev | cut -d" " -f1 | rev | sed 's/.$//')
+        RESULT=$(host $IP $DNS | tail -1 | rev | cut -d" " -f1 | rev | sed 's/.$//')
         if [ "$RESULT" != "$1" ]; then
                 ((fails++))
         fi