Ports & Protocols Flashcards
Port Types:
Port
A logical communication endpoint that exists on a computer or server
Inbound Port
A logical communication opening on a server that is listening for a connection from a client
Outbound Port
A logical communication opening created on a client in order to call out to a server that is listening for a connection
Well-Known Ports
Ports 0 to 1023 are considered well-known and are assigned by the Internet Assigned Numbers Authority (IANA)
Registered Ports
Ports 1024 to 49,151 are considered registered and are usually assigned to proprietary protocols
Dynamic/Private Ports
Ports 49,152 to 65,535 can be used by any application without being registered with IANA
FTP
TCP Port 20, 21
SSH/SCP/SFTP
TCP/UDP Port 22
Telnet
TCP/UDP Port 23
SMTP
TCP Port 25
DNS
TCP/UDP Port 53
TFTP
UDP Port 69
HTTP
TCP Port 80
Kerberos
TCP/UDP Port 88
POP3
TCP Port 110
NNTP
TCP Port 119
Network News Transfer Protocol is used to transport Usenet articles
RPC/DCOM-scm
Remote Procedure Call is used to locate DCOM ports request a service from a program on another computer on the network
TCP/UDP Port 135
NetBIOS
TCP/UDP Port 137-139
IMAP
TCP Port 143
SNMP
UDP Port 161
SNMPTRAP
TCP/UDP Port 162
LDAP
TCP/UDP Port 389
HTTPS
TCP Port 443
SMB
TCP Port 445
SMTP over SSL/TLS
TCP Port 465/587
Syslog
UDP Port 514
LDAP over SSL/TLS
TCP/UDP Port 636
iSCSI
iSCSI is used for linking data storage facilities over IP
TCP Port 860
FTPS
TCP Port 989/990
IMAP4 over SSL/TLS
TCP Port 993
POP3 over SSL/TLS
TCP Port 995
MS-SQL-S (Or just SQL)
TCP Port 1433
L2TP
UDP Port 1701
PPTP
TCP/UDP Port 1723
RADIUS
UDP Port
1812 = Authentication/Authorization
1813 = Accounting
Alternative:
1645 = Authorization/Authentication
1646 = Accounting
FCIP
Fibre Channel IP is used to encapsulate Fibre Channel frames within TCP/IP packets
TCP/UDP Port 3225
RDP
TCP/UDP Port 3389
iSCSI Target
iSCSI Target is the listening port for iSCSI-targeted devices when linking data storage facilities over IP
TCP Port 3260
Diameter
A more advanced AAA protocol that is a replacement for RADIUS
TCP Port 3868
Syslog over TLS
TCP Port 6514