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A firewall only protects against direct scanning from outside. If you set up a web server and manage to get some user inside the firewall to visit your site you can use this to do limited scans from inside with the help of the browser and some Javascript. See https://defuse.ca/in-browser-port-scanning.htm for an example or search for more examples. Note ...


I assume you are talking about the Mask Attack and not Brute-force Attack which is outdated and replaced by Mask Attack. I had to add --pwd-min=8 to the list of parameters to force it to start at 8 digits from the get-go. Source: http://hashcat.net/forum/thread-1538.html


A port scanner, like nmap, connects to a port and analyzes the traffic being returned. A firewall's most basic function is to block access to a port. This means that there is no way to scan a port that is being blocked by a firewall. With some exceptions... Some firewalls will allow traffic to a port unless it determines that the traffic is malicious (like ...


You can try to use something as the -T2 option to slow down the scan since many firewall drop packets sent too fast. There's a list of option that can help you with IDS\firewall evasion: https://nmap.org/book/man-bypass-firewalls-ids.html


Do you have '-i' or increment enabled? This sounds like you do. Disable it if you don't want it to run through all shorter permutations.

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