Fierce چیست؟

ابتدا اجازه دهید بگوییم ابزار Fierce چه نیست. Fierce نه یک IP Scanner است نه یک ابزار DDoS. همچنین برای اسکن کل شبکه اینترنت و حملاتی که هدف (Target) در آن مشخص نیست، قابل استفاده نیست. همچنین هیچ عملیاتی مبنی بر Exploit صورت نمی گیرد (مگر اینکه از سوئیچ Connect- استفاده کنید.). Fierce یک ابزار شناسایی و اکتشاف به زبان Perl است که با سرعت بسیار بالا (اگر شبکه دارای lag نباشد در کمتر از چند دقیقه) قادر به اسکن دامنه ها با تکنیک های مختص به خودش است.


لینک منبع:
لایسنس: GPLv2
سازنده: RSnake


نمونه دستور: fierce -h (C) Copywrite 2006,2007 - By RSnake at

    Usage: perl [-dns] [OPTIONS]

    Fierce is a semi-lightweight scanner that helps locate non-contiguous
    IP space and hostnames against specified domains.  It's really meant
    as a pre-cursor to nmap, unicornscan, nessus, nikto, etc, since all
    of those require that you already know what IP space you are looking
    for.  This does not perform exploitation and does not scan the whole
    internet indiscriminately.  It is meant specifically to locate likely
    targets both inside and outside a corporate network.  Because it uses
    DNS primarily you will often find mis-configured networks that leak
    internal address space. That's especially useful in targeted malware.

    -connect    Attempt to make http connections to any non RFC1918
        (public) addresses.  This will output the return headers but
        be warned, this could take a long time against a company with
        many targets, depending on network/machine lag.  I wouldn't
        recommend doing this unless it's a small company or you have a
        lot of free time on your hands (could take hours-days).
        Inside the file specified the text "Host:\n" will be replaced
        by the host specified. Usage:

    perl -dns -connect headers.txt

    -delay      The number of seconds to wait between lookups.
    -dns        The domain you would like scanned.
    -dnsfile    Use DNS servers provided by a file (one per line) for
                reverse lookups (brute force).
    -dnsserver  Use a particular DNS server for reverse lookups
        (probably should be the DNS server of the target).  Fierce
        uses your DNS server for the initial SOA query and then uses
        the target's DNS server for all additional queries by default.
    -file       A file you would like to output to be logged to.
    -fulloutput When combined with -connect this will output everything
        the webserver sends back, not just the HTTP headers.
    -help       This screen.
    -nopattern  Don't use a search pattern when looking for nearby
        hosts.  Instead dump everything.  This is really noisy but
        is useful for finding other domains that spammers might be
        using.  It will also give you lots of false positives,
        especially on large domains.
    -range      Scan an internal IP range (must be combined with
        -dnsserver).  Note, that this does not support a pattern
        and will simply output anything it finds.  Usage:

    perl -range 111.222.333.0-255 -dnsserver

    -search     Search list.  When fierce attempts to traverse up and
        down ipspace it may encounter other servers within other
        domains that may belong to the same company.  If you supply a
        comma delimited list to fierce it will report anything found.
        This is especially useful if the corporate servers are named
        different from the public facing website.  Usage:

    perl -dns -search corpcompany,blahcompany

        Note that using search could also greatly expand the number of
        hosts found, as it will continue to traverse once it locates
        servers that you specified in your search list.  The more the
    -suppress   Suppress all TTY output (when combined with -file).
    -tcptimeout Specify a different timeout (default 10 seconds).  You
        may want to increase this if the DNS server you are querying
        is slow or has a lot of network lag.
    -threads  Specify how many threads to use while scanning (default
      is single threaded).
    -traverse   Specify a number of IPs above and below whatever IP you
        have found to look for nearby IPs.  Default is 5 above and
        below.  Traverse will not move into other C blocks.
    -version    Output the version number.
    -wide       Scan the entire class C after finding any matching
        hostnames in that class C.  This generates a lot more traffic
        but can uncover a lot more information.
    -wordlist   Use a seperate wordlist (one word per line).  Usage:

    perl -dns -wordlist dictionary.txt

مثال: یک اسکن در حالت استاندارد بر روی یک هدف دامنه انجام می دهد. fierce -dns
DNS Servers for

Trying zone transfer first...
        Request timed out or transfer not allowed.
        Request timed out or transfer not allowed.

Unsuccessful in zone transfer (it was worth a shot)
Okay, trying the good old fashioned way... brute force

Checking for wildcard DNS...
Nope. Good.
Now performing 2280 test(s)...
میلاد خوشدل

در حوزه‌ی امنیت وب و شبکه فعالیت می کند، عاشق پارکور است و مدیریت دیتاسنتر، امن سازی شبکه های مخابراتی و کابلی و برنامه نویسی وب و موبایل از تجارب کاری او می باشد. او در حال حاضر بنیانگذار ریجاکس است.

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