msf 内置 search 模块，在实战中，为了更快速的找到对应模块，它提供了 type 参数（未来会具体讲到模块参数），以 ftp 模块为例。
msf > search type:auxiliary ftp
Matching Modules
================
Name Disclosure Date Rank Description
---- --------------- ---- -----------
auxiliary/admin/cisco/vpn_3000_ftp_bypass 2006-08-23 normal Cisco VPN Concentrator 3000 FTP Unauthorized Administrative Access
auxiliary/admin/officescan/tmlisten_traversal normal TrendMicro OfficeScanNT Listener Traversal Arbitrary File Access
auxiliary/admin/tftp/tftp_transfer_util normal TFTP File Transfer Utility
auxiliary/dos/scada/d20_tftp_overflow 2012-01-19 normal General Electric D20ME TFTP Server Buffer Overflow DoS
auxiliary/dos/windows/ftp/filezilla_admin_user 2005-11-07 normal FileZilla FTP Server Admin Interface Denial of Service
......
