Network Ports Flashcards

1
Q

21

A

TCP

FTP: File Transfer Protocol

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2
Q

22

A
TCP, UDP
SSH, SCP, SFTP 
SSH is Secure Shell, used for remote admin
SCP is secure copy
SFTP is secure file transfer
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3
Q

23

A

TCP, UDP
Telnet
Unencrypted protocol for remote admin
DO NOT USE. Block this port!

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4
Q

25

A

TCP
SMTP
Simple Mail Transfer Protocol
common email service

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5
Q

53

A

TCP, UDP
DNS
Domain Name Service
Resolves hostnames to IPs and IPs to hostnames

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6
Q

69

A

UDP
TFTP
Trivial FTP. Simplified version of FTP. Not secure.

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7
Q

80

A

TCP
HTTP
web browsing, not secure

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8
Q

88

A

TCP, UDP
Kerberos
Network authentication using tickets in Windows domain

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9
Q

110

A

TCP
POP3
Post Office Protocol v3. Another common email service

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10
Q

119

A

TCP
NNTP
Network News Transfer Protocol
transports Usenet articles

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11
Q

135

A

TCP, UDP
RPC/DCOMscm
Remote Procedure Call locates DCOM ports to request a service from a program on another computer on the network

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12
Q

137

A

137, 138, 139 TCP, UDP
NetBIOS
Used to conduct name querying, sending of data, and other functions

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13
Q

143

A

TCP
IMAP
Internet Message Access Protocol
another email service, with more features than POP3

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14
Q

161

A

UDP
SNMP
Simple Network Management Protocol
remotely monitors network devices

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15
Q

162

A

TCP, UDP
SNMPTRAP
sends Trap and InformRequests to the SNMP Manager on a network

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16
Q

389

A

TCP, UDP
LDAP
Lightweight Directory Access Protocol
used to maintain directories of users and other objects

17
Q

443

A

TCP
HTTPS
Hyper Text Transfer Protocol Secure
secure web browsing. Uses SSL/TLS encrypted connection

18
Q

445

A

TCP
SMB
Server Message Block
used to provide shared access to files and other resources on a network

19
Q

465

A

TCP
SMTP with SSL/TLS
Secured SMTP email. Also uses port 587

20
Q

587

A

TCP
SMTP with SSL/TLS
Secured SMTP email. Also uses port 465

21
Q

514

A

UDP
Syslog
used to conduct message logging, esp for router and firewall logs

22
Q

636

A

TCP, UDP
LDAP SSL/TLS
Secure version of LDAP. Used to maintain directories of users and other objects

23
Q

860

A

TCP
iSCSI
used for linking data storage facilities over IP

24
Q

989

A

TCP
FTPS
File Transfer Protocol Secure. Also uses port 990

25
Q

990

A

TCP
FTPS
File Transfer Protocol Secure. Also uses port 989

26
Q

993

A

TCP
IMAP4 with SSL/TLS
Internet Message Access Protocol over SSL/TLS
email with more features than POP3

27
Q

995

A

TCP
POP3 SSL/TLS
Secure version of POP3 email

28
Q

1433

A

TCP
MS SQL Server
database

29
Q

1645

A

UDP
RADIUS
Remote Authentication Dial-In User Service
Uses 1645 for authentication and 1646 for accounting. Also uses 1812/1813 similarly, with 1812/1813 being the main ports

30
Q

1812

A

UDP
RADIUS
Remote Authentication Dial-In User Service
Uses 1812 for authentication and 1813 for accounting. Also uses 1645/1646 similarly, with 1812/1813 being the main ports

31
Q

1701

A

UDP
L2TP
Layer 2 Tunnel Protocol
underlying VPN protocol but has no inherent security

32
Q

1723

A

TCP, UDP
PPTP
Point to Point Tunneling Protocol
a VPN protocol with built in security

33
Q

3225

A

TCP, UDP
FCIP
Fibre Channel IP
Encapsulates Fibre Channel frames within TCP/IP packets

34
Q

3260

A

TCP
iSCSI Target
this is a listening port for iSCSI targeted devices when linking data storage facilities over IP

35
Q

3389

A

TCP, UDP
RDP
Remote Desktop Protocol
Windows only

36
Q

3868

A

TCP
Diameter
More advanced replacement for RADIUS

37
Q

6514

A

TCP
Syslog over TLS
Secure version of Syslog for logging of messaging from firewalls, routers, etc.