A remix of fresh.sh with threading and some lots of added benefits :)
Tested on Python 3.5+
$ git clone https://github.com/teknogeek/fresh.py && cd fresh.py
$ pip3 install -r requirements.txt
$ python3 fresh.py
usage: fresh.py [-h] [-q QUERY_DOMAIN] [-f FALSE_POSITIVE_DOMAIN]
[-b BASELINE_SERVER] [-o OUTPUT_FILE] [-t TIMEOUT]
[-r RETRIES] [-j JOB_COUNT] [-k] [-v] [--clean CLEAN_REGEX]
[--noclean]
optional arguments:
-h, --help show this help message and exit
-q QUERY_DOMAIN, --query QUERY_DOMAIN
Valid domain to query each resolver for, e.g.
example.com, images.google.com (default: example.com)
-f FALSE_POSITIVE_DOMAIN, --fpdomain FALSE_POSITIVE_DOMAIN
Invalid domain to test as a false positive for each
resolver, e.g. ygsfdhauysuh.example.com,
www.thisisnotarealdomain.google.com (default:
www.workshop.netscape.com)
-b BASELINE_SERVER, --baseline BASELINE_SERVER
DNS server IP to use for baseline sanity check to
compare all other resolver results against, e.g.
1.1.1.1, 8.8.8.8 (default: 1.1.1.1)
-o OUTPUT_FILE, --output OUTPUT_FILE
Output file for valid resolvers (default:
resolvers.txt)
-t TIMEOUT, --timeout TIMEOUT
DNS query timeout for each resolver (in seconds)
(default: 3)
-r RETRIES, --retries RETRIES
Number of times to retry querying each resolver
(default: 1)
-j JOB_COUNT, --jobs JOB_COUNT
Number concurrent threads to use (default: 50)
-k, --keep Keep and rename the output file if it already exists
(default: False)
-v, --verbose Increase verbosity to show each resolver being testing
(disables progress bar) (default: False)
--clean CLEAN_REGEX File containing a list of regex patterns used to match
and clean bad results and resolvers (default:
clean_regex.txt)
--noclean Force fresh.py not to pre-clean the resolver list with
patterns from the the --clean file (default: False)
No matter how good your resolver list is, there's a pretty good chance you're gonna get false positives. While this script attempts to mitigate as much of that as it can before doing DNS lookups (by checking the resolvers), it's not perfect. As a resuslt, I Massdns The clean.sh and clean_regex.txt files are used to clean and sanitize both the resolver addresses themselves and any DNS lookup results.
Massdns example:
$ python3 fresh.py -o resolvers.txt
$ massdns -r resolvers.txt -t A -o S -w massdns_output.txt domain_list.txt
$ bash clean.sh massdns_output.txt > massdns_clean.txt
clean.sh is really just a egrep -vf that uses the clean_regex.txt patterns by default. You can optionally provide your own regex pattern file as a second argument:
$ ~/fresh.py/clean.sh
Usage: clean.sh <input_file> [regex_pattern_file]
This will usually end up outputting a very clean resulting file.
I would love more regex contributions! These regex patterns come from my own personal observations and testing.