{"id":8,"date":"2024-09-06T22:38:54","date_gmt":"2024-09-06T21:38:54","guid":{"rendered":"https:\/\/www.northit.co.uk\/posts\/?p=8"},"modified":"2024-09-07T02:13:59","modified_gmt":"2024-09-07T01:13:59","slug":"bypassing-port-scan-blocking-firewalls","status":"publish","type":"post","link":"https:\/\/www.northit.co.uk\/posts\/bypassing-port-scan-blocking-firewalls\/","title":{"rendered":"How to Bypass Port Scan Blocking Firewalls"},"content":{"rendered":"\n

<\/p>\n\n\n\n

This guide will help you bypass port scan blocking firewalls using the dark web, TOR. Our pen-test team will often use it as part of an external network pen-test<\/a> where a number of firewalls and devices are now attempting to block port scans.<\/p>\n\n\n\n

Please see Bypassing Post Scan Blocking<\/a> video for this in youtube format!<\/p>\n\n\n\n

The Linux distro we are using is Kali Linux.<\/p>\n\n\n\n

Step 1: Download the GitHub Repo<\/h2>\n\n\n\n

Open your linux terminal, install git with sudo apt install git<\/code>. Then, download the code by using git clone https:\/\/github.com\/NorthInfosecTesting\/tor_port_scan.git<\/code>.<\/p>\n\n\n\n

Step 2: Install the Requirements<\/h2>\n\n\n\n

Once the GitHub Repo is downloaded, you need to ensure any prerequisites are installed.<\/p>\n\n\n\n

    \n
  1. Change directory to the downloaded tor_port_scan directory by entering cd tor_port_scan<\/code><\/li>\n\n\n\n
  2. Install TOR by entering sudo apt install tor<\/code><\/li>\n\n\n\n
  3. You may need to uncommect ControlPort 9051<\/code> from the file \/etc\/tor\/torrc<\/code> by removing the #<\/code> from #ControlPort 9051<\/code>

    \"\"
    <\/li>\n\n\n\n
  4. Enter sudo systemctl restart tor<\/code>, then sudo systemctl start tor<\/code><\/li>\n\n\n\n
  5. Ensure pip and python3 is installed, and enter python3 install -r requirements.txt<\/code><\/li>\n<\/ol>\n\n\n\n

    Step 3: Script Parameters<\/h2>\n\n\n\n

    Now the requirements are installed, the TOR port scan python script is ready to run. However, first lets check what parameters can be passed to the script.<\/p>\n\n\n\n

      \n
    1. python3 scan.py -h<\/code> will bring up the usage menu.
      \"\"<\/li>\n\n\n\n
    2. python3 scan.py [target]<\/code> will execute a port scan changing the TOR address every 5 ports.
      \"\"<\/li>\n\n\n\n
    3. You can use the --tor-interval [n]<\/code> flag to change the number of ports scanned before the TOR IP address is changed. For example, python3 python3 scan.py --tor-interval 10 [target]<\/code><\/li>\n\n\n\n
    4. The timeout -t<\/code> flag can be used to enter the TIMEOUT seconds to wait before connection timeout for each port.<\/li>\n\n\n\n
    5. The jobs -j<\/code> flag can be used to set the maximum number of open connections at the same time.<\/li>\n<\/ol>\n\n\n\n

      <\/p>\n","protected":false},"excerpt":{"rendered":"

      This guide will help you bypass port scan blocking firewalls using the dark web, TOR. Our pen-test team will often use it as part of an external network pen-test where a number of firewalls and devices are now attempting to block port scans. Please see Bypassing Post Scan Blocking video for this in youtube format! […]<\/p>\n","protected":false},"author":1,"featured_media":11,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_daextamp_enable_autolinks":"","footnotes":""},"categories":[5,14],"tags":[10,9],"class_list":["post-8","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-code","category-how-to","tag-firewalls","tag-port-scanning"],"_links":{"self":[{"href":"https:\/\/www.northit.co.uk\/posts\/wp-json\/wp\/v2\/posts\/8","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.northit.co.uk\/posts\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.northit.co.uk\/posts\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.northit.co.uk\/posts\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.northit.co.uk\/posts\/wp-json\/wp\/v2\/comments?post=8"}],"version-history":[{"count":4,"href":"https:\/\/www.northit.co.uk\/posts\/wp-json\/wp\/v2\/posts\/8\/revisions"}],"predecessor-version":[{"id":79,"href":"https:\/\/www.northit.co.uk\/posts\/wp-json\/wp\/v2\/posts\/8\/revisions\/79"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.northit.co.uk\/posts\/wp-json\/wp\/v2\/media\/11"}],"wp:attachment":[{"href":"https:\/\/www.northit.co.uk\/posts\/wp-json\/wp\/v2\/media?parent=8"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.northit.co.uk\/posts\/wp-json\/wp\/v2\/categories?post=8"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.northit.co.uk\/posts\/wp-json\/wp\/v2\/tags?post=8"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}