Ports And Protocols Flashcards
FTP
Port 20,21
File transfer
SSH
22
Secure Remote access
SFTP
Port 22
Secure file transfer
Telnet
Port 23
Insecure remote access
SMTP
Port 25
Sending emails
DNS
Port 53
Domain name service
DHCP
Ports 67,68
Dynamic host control
TFTP
Port 69
Trivial file transfer
Lightweight transfer method for sending config files or network booting of OS
HTTP
Port 80
Web browser
POP3
Port 110
Receiving emails
NTP
Port 123
Network time
Used to keep accurate time for clients on network
NetBIOS
Port 139
Windows file sharing
IMAP
Port 143
Receiving emails
SNMP
161,162
Network management
LDAP
389
Lightweight directory services
HTTPS
443
Secure web browser
SMB
445
Windows file sharing
Syslog
514
System logging
SMTP TLS
587
Secure sending emails
LDAPS
636
Secure directory services
IMAP SSL
993
Secure receiving emails
POP3 SSL
995
Secure receiving emails
SQL
1433
Database communication
SQLnet
1521
Oracle DB communication
MySQL
3306
MySQL DB communication
RDP
3389
Remote Desktop
SIP
5060,5061
VoIP and video calls
Kerberos
Port 88
-Network Authentication protocol
-Integrates with AD and uses ticketing system instead of sending passwords over insecure network
-allows nodes to communicate over non-secure network to prove their identity in a secure manner.
RADIUS
Remote Authentication Dail-In User Service
Port 1812 Authentication messages
Port 1813 Accounting messages
Uses 802.1x and EAP
Layer 7 OSI
UDP
Faster than TACACS+
AAA through RADIUS uses Server secret key (key mismatch could cause log in problems)
TACACS+
-Terminal Access Controller Access Control System Plus
-Authentication
-Cisco proprietary protocol
-TCP
-Slower than RADIUS
Port 49
