Initial access (protocols)

Theory
Practice
Well known ports
Common port
Protocol
Description
21/TCP
FTP
​
22/TCP
SSH
​
23/TCP
Telnet
​
53/UDP or 53/TCP
DNS
​
80/TCP
HTTP
​
88/TCP
Kerberos
​
389/TCP
LDAP
​
443/TCP
HTTPS
​
445/TCP
SMB
​
554/TCP
RTSP
​
1433/TCP
MSSQL
​
2049/TCP
NFS
​
3306/TCP
MySQL
​
3389/TCP
RDP
​
5585/TCP or 5586/TCP
WinRM
​

Common port	Protocol	Description
`21/TCP`	FTP
`22/TCP`	SSH
`23/TCP`	Telnet
`53/UDP` or `53/TCP`	DNS
`80/TCP`	HTTP
`88/TCP`	Kerberos
`389/TCP`	LDAP
`443/TCP`	HTTPS
`445/TCP`	SMB
`554/TCP`	RTSP
`1433/TCP`	MSSQL
`2049/TCP`	NFS
`3306/TCP`	MySQL
`3389/TCP`	RDP
`5585/TCP` or `5586/TCP`	WinRM

Port scanning

🛠️ FTP

Last modified 11mo ago