Create blocklist-bulk-check.sh

A tool to check dead domain in blocklist or deadlist

Thanks to: https://gist.github.com/chrisdavidmiles/5aa1b3c7194bde4c7aa34895c1e497d6

hosts/blocklist-bulk-check.sh

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+#!/bin/bash
+# Bulk DNS Lookup 
+# Credit: https://gist.github.com/chrisdavidmiles/5aa1b3c7194bde4c7aa34895c1e497d6
+# Generates a CSV of DNS lookups from a list of domains.
+
+## Command to format your blacklist properly
+## cat blacklist.txt | grep -v '^#' | tr -s '\n' '\n' | grep -Ev "^$" | grep -o '^[^#]*' > tmp_blacklist
+
+# File name/path of domain list:
+domain_list='blacklist.txt' # One FQDN per line in file.
+#
+# IP address of the nameserver used for lookups:
+ns_ip='1.0.0.1' # Is using Cloudflare's 1.1.1.1.
+#
+# Seconds to wait between lookups:
+loop_wait='1' # Is set to 1 second.
+
+echo "Domain name, IP Address, IP PTR, IP NetName (WHOIS)"; # Start CSV
+echo > invalid.txt
+for domain in `cat $domain_list | grep -v '^#' | tr -s '\n' '\n' | grep -Ev "^$" | grep -o '^[^#]*' ` # Start looping through domains
+
+do
+    ip=`dig @$ns_ip +short $domain |tail -n1`; # IP address lookup
+    if [ ! -n "$ip" ] # If the IP is null (expired or invalid domain)
+        then # Then
+            echo "$domain,No DNS,," >> invalid.txt; # Write "No DNS" in the IP column
+        else # And if an IP is found perform a PTR and NetName lookup
+            echo -en "$domain,$ip,"`dig @$ns_ip +short -x $ip |xargs`",";
+            whois $ip |grep -i 'netname' |awk '{print $NF}'|xargs;
+    fi
+    sleep $loop_wait # Pause before the next lookup to avoid flooding NS
+done;