security+ ports cheat sheet, Cheat Sheet of Network security

Download security+ ports cheat sheet and more Cheat Sheet Network security in PDF only on Docsity! Ports and Services I TCP/IP communication first needs a server to open a port I “Speaking” to the service on the other side needs knowledge about the higher-level protocol I Some services announce what they are through a “banner” I Internet Assigned Numbers Authority (IANA) defines list of known ports and services I Same port for UDP and TCP (but service is not necessarily listening on both) I List in file /etc/services I It is of course not mandatory to use these ports, but it’s what clients assume Network Security – Security aspects of TCP/IP 17 Common services and their ports TCP/UDP port Service 21 File Transfer Protocol (FTP) 22 Secure Shell (SSH) 25 Simple Mail Transfer Protocol (SMTP) 53 Domain Name Server 80 Hypertext Transfer Protocol (HTTP) 110 Post Office Protocol (POP3) 143 Interim Mail Access Protocol (IMAP) 443 HTTP over SSL/TLS (HTTPS) 465 SMTP over SSL/TLS (SMTPS) 993 IMAP over SSL/TLS (IMAPS) 995 POP3 over SSL/TLS (POP3S) Network Security – Security aspects of TCP/IP 18