Making Linux secure

• Why worry?
  • My linux computer at home (last one year on cable modem): 961 malicious attempts (packets rejected) (from 348 unique hosts)
  • Ports targeted:

    20  (ftp-data):       6
    21  (ftp):          176
    23  (telnet):        45
    111 (sunrpc):       572
    113 (pidentd):       64
    119 (nntp):          35
    137 (netbios):        4
    138 (netbios):        4
    139 (netbios):        4
    515 (lpd):           51
    

  • Script Kiddies are specifically looking for cable modem attached linux boxes!