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Spam und kein Ende
Welche Abwehrmethode macht Sinn?
Tobias Anton




2. IT­Sicherheitsforum Südwestfalen
14. Mai 2009
Agenda

  Aktuelle Entwicklungen
●

● Ursachen

● Gefahren

● Inhouse vs. Outsourcing

● Fazit
Aktuelle Entwicklungen

  85,3%1 Spamanteil am weltweiten Mailverkehr (04/2009)
●

● „97 Prozent aller eingehenden Mails auf Servern von


  Unternehmen sind unerwünschte Spam­Mails.“2




Quellen: 1MLI-Report 04/2009 MessageLabs/Symantec
         2
           sophos.de




                                                    as­antispam.de
Herkunft




Quelle: sophos.de




                    as­antispam.de
Gefahren

  Überfüllte E­Mail Postfächer (Zeit­ & Produktivitätsverlust)
●

● Erhöhte Last auf Netzwerkressourcen

● Erhöhter Administrationsaufwand

● Phishing – Angriffe & Malware




                          as­antispam.de
Ursachen

Spam lohnt sich (noch immer):

  Uni Berkeley: 28 Käufe aus 360 Mio. Mails
●

● Botnetz „Storm“ (hochgerechnet):  ca. 7000$/Tag


                                     ~ 2,5 Mio. $/Jahr

             Bot
    Master


                     Bot
              Bot


     Bot
                     Bot
              Bot

                           as­antispam.de
Neue Trends/Gründe für Spam

Phishing
Definition: Versuche von Dritten, über gefälschte
            E­Mails oder Webseiten auf vertrauliche Informationen von Kunden,
            Institutionen und Organisationen Zugriff zu erlangen




           Schaden in Deutschland (2006): 13 Millionen


                                   as­antispam.de
as­antispam.de
as­antispam.de
Neue Trends/Gründe für Spam

Malware: Viren, Würmer, Trojaner




                        as­antispam.de
Erkenntnis



      Sicherheit erhöhen + Kosten senken
         = Spamabwehr ist ein MUSS!




                     as­antispam.de
Abwehrmethoden: Inhouse vs. Outsourcing
Inhouse clientseitig

Vorteile                   Nachteile
­ teilw. kostenlos         ­ Netzwerkressourcen
­ letzte Kontrolle  vor    ­ Viren
dem Posteingang            ­ Speicherplatz
                           ­ Pflegeaufwand




                          as­antispam.de
Inhouse  serverseitig

Vorteile                 Nachteile
­ teilw. kostenlos       ­ Pflegeaufwand
­ zentrale Kontrolle     ­ Hardwareinvestition
­ vor dem PC             ­ Kein Schutz vor DDOS
­ zentrale Updates       ­ Netzwerkressourcen




                        as­antispam.de
Outsourcing
Vorteile                          Nachteile

­ einfaches Setup             ­ Kompetenzverlust
­ Schutz vor DDOS             ­ Datenschutz?
­ Verlagerung ins Internet
­ weniger eigene HW & SW
­ Sofortige Updates
­ Kein Administrationsaufwand
­ Expertenbetreuung
­ Fokus auf Kerngeschäft



                       as­antispam.de
Outsourcing ist Strategiefrage

Wieviel Handlungsspielraum benötige ich?




                       as­antispam.de
Fazit

              funktional              monetär

Inhouse       + Zeitgewinn            + SW kostenlos
              ­/+ Spamabwehr          ­ Personalaufwand
              ­/+ Sicherheit          ­ HW­Kosten
              ­ Netzressourcen
Outsourcing
              + Spamabwehr       + Einsparung
              + Zeitgewinn
              + Know How
              ­ Datenschutz
              ­ Kompetenzverlust
                     as­antispam.de
Fragen?


Tobias Anton
tobias.anton@as-antispam.de
http://www.xing.com/profile/Tobias_Anton
http://tobiasanton.de
http://twitter.com/tobias_a




                          as­antispam.de

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