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BEZPEČNÝ Petr Fortelný

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Prezentace na téma: "BEZPEČNÝ Petr Fortelný"— Transkript prezentace:

1 BEZPEČNÝ Petr Fortelný

2 Jak pošta pracuje

3 Jak to funguje uvnitř

4 Jak se bránit ● Firewall ● Antivir ● Spamový filter ● Nastavení klientů ● Informování uživatelů

5 Antiviry ● NOD 32 ● Clamav ● AVG Linux Mail Server ● KAV Mail Server ● Amavis

6 Antispam ● Spamassassin ● Spamd ● Spam Inspector ● Kaspersky Anti-spam

7 Kde hledat ● ● ● ● ● ● :)

8 Open rellay Telnet dahlia 25 helo taiji 250 dahlia.mendelu.cz mail from: rcpt to: data To: Subjekt: Pozdrav od nikud From: Ahoj Chlape nedelal jsi dobrotu jsi na rade. zdar luciper. 250 Ok: queued as 90D2AD9139 ● Jak poslat anonymní -)

9 Porovnání vyspělosti různých MTA

10 RFC ● RFC 821, Simple Mail Transfer Protocol (obsoleted by RFC 2821) ● RFC 822, Standard for the Format of ARPA Internet Text Messages (obsoleted by RFC 2822) ● RFC 931, Authentication Server. ● RFC 974, Mail Routing and the Domain System. ● RFC 1123, Requirements for Internet Hosts -- Application and Support. ● RFC 1413, Identification Protocol. ● RFC 1423, Privacy Enhancement for Internet Electronic Mail: Part III: Algorithms, Modes, and Identifiers. ● RFC 1651, SMTP Service Extensions. ● RFC 1652, SMTP Service Extension for 8bit-MIMEtransport. ● RFC 1806, Content disposition. header. ● RFC 1854, SMTP Service Extension for Command Pipelining. ● RFC 1891, SMTP Service Extension for Delivery Status Notifications.

11 RFC ● RFC 1892, The Multipart/Report Content Type for the Reporting of Mail System Administrative Messages. ● RFC 1893, Enhanced mail system status codes. ● RFC 1894, An Extensible Message Format for Delivery Status Notifications. ● RFC 1939, Post Office Protocol - Version 3. ● RFC 1985, SMTP Service Extension for Remote Message Queue Starting (ETRN). ● RFC 1991, PGP Message Exchange Formats. ● RFC 2015, MIME Security with Pretty Good Privacy. (PGP). ● RFC 2045, MIME Internet message bodies. ● RFC 2046, MIME Media Types. ● RFC 2047, MIME Headers. ● RFC 2048, MIME Registration Procedures. ● RFC 2049, MIME Conformance Criteria. ● RFC 2142, Mailbox names for common services. ● RFC 2183, Content Disposition header. ● RFC 2821, Simple Mail Transfer Protocol. ● RFC 2822, Internet Message Format


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