Lookup Multiple Entries

This Python script is a multithreaded tool for performing NSLOOKUP queries using a user-defined DNS server. It supports CSV file input and manual entry of FQDN/IP addresses. The script utilizes the dns.resolver module for DNS resolution and implements functions such as nslookup, reverse_lookup, and process_entries. The user is prompted to provide the DNS server and choose between manual entry or file input for performing the NSLOOKUPs.