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TCP/IP Protocols

Protocol / Number
IP/25
Description
leaf-1 - Leaf-1
Protocol / Port
TCP/25
Description
smtp - Simple Mail Transfer Protocol, RFC 821

Risks of having this protocol opened:
- email relay
- denial of service against the SMTP server
- various vulnerabilities in SMTP servers (i.e. Sendmail)
- allowing internal users outgoing SMTP may allow them to bypass the internal email system and use unauthorized email servers
***
Protocol / Port
TCP/25
Description
trojan - Reported Trojan programs using this port: Aji,Antigen,Email Password Sender,Gip,Happy 99,I Love You,Kuang 2,Magic Horse,Moscow Email,Naebi,NewApt,ProMail,Shtrilitz,Stealth,Tapiras,Terminator,WinPC,WinSpy ***
*** This protocol has been used in attacks
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