ports Flashcards
Telnet
TCP/23
- login to devices remotely
- console access
SSH
Secure Shell
TCP/22
- Encrypted communication link
DNS
Domain Name System
UDP/53
- Larger transfers may use TCP/53
SMTP
Simple Mail Transfer Protocol
TCP/25 (SMTP using plaintext)
TCP/587 (SMTP using TLS encryption)
POP3
Post office Protocol version 3
TCP/110 (plaintext)
TCP/995 (POP over TLS)
- basic mail transfer functionality
IMAP4
Internet Message Access Protocol v4
TCP/143 (paintext)
TCP/993 (IMAP over TLS)
- includes management of email inbox from multiple clients
SFTP
Secure Shell File Transfer Protocol
TCP/22
provides file system functionality: resuming interrupted transfers, directory listings,
remote file removal
FTP
File Transfer Protocol
TCP/20 (active mode) actually transfering the file
TCP/21 (control) tells the system which file to send
- Transfers files between systems
- Authenticates with a username and password
- full-featured functionality (lists, add, deletes, etc.)
TFTP
Trivial File Transfer Protocol
UDP/69
- Very simple file transfer application
- No authentication
DHCP
Dynamic Host Configuration Protocol
UDP/67
UDP/68
- Requires a DHCP server
- Automated configuration of IP address, subnet mask and other options
HTTP
Hypertext Transfer Protocol
TCP/80
- Communication in the browser and other applications
HTTPS
Hypertext Transfer Protocol Secure
TCP/443
-Web server communication with encryption
SNMP
Simple Network Management Protocol
UDP/161
- Gather statistics from network devices
- SNMP traps: Alerts and notification from the network devices UDP/162
Syslog
UDP/514
- Standard for message logging
- instead of going to each device on the network 1 by 1 and checking for alerts. This allows us to check 1 central repository where each device sends their logs
RDP
Remote Desktop Protocol
TCP 3389
- Share a desktop from a remote location
NTP
Network Time Protocol
UDP/123
- Switches, Routers, Firewalls, Servers, Workstations
- Every device has its own clock
SIP
Sessions Initiation Protocol
TCP/5060
TCP/5061
- Voice over IP (VoIP) signaling
- Setup and manage VoIP sessions: Call, Ring, hang up
SMB
Server Message Block
TCP/445
- Protocol used by Microsoft Windows
- File sharing, printer sharing
- Also called CIFS (Common Internet File System)
LDAP/LDAPS
Lightweight Directory Access Protocol
TCP/389
- Store and retrieve information in a network directory
LDAPS (LDAP Secure)
TCP/636
- A non-standard implementation of LDAP over SSL
Microsoft SQL Server
Microsoft Structured Query Language)
TCP/1433
Oracle SQL *Net
TCP/1521
- Also called Oracle Net or Net8
MYSQL
TCP/3306
- free and open-source database
- Ultimately acquired by Oracle
