Common Ports Flashcards
1
Q
88
A
Key Distribution Center (KDC) TCP or UDP
2
Q
1812
A
Remote Authentication Dial-In User Service (RADIUS) UDP
3
Q
49
A
Terminal Access Controller Access-Control System (TACACS+) TCP
4
Q
389
A
Lightweight Directory Access Protocol (LDAP) TCP and UDP
5
Q
636
A
Lightweight Directory Access Protocol over SSL (LDAPS)
6
Q
25
A
SMTP (TCP)
7
Q
110
A
Post Office Protocol version 3 (POP3) TCP
8
Q
143
A
Internet Message Access Protocol version 4 (IMAP)
9
Q
993
A
IMAP over SSL
10
Q
1723
A
PPTP
11
Q
47
A
Generic Routing Encapsulation (GRE) UDP
12
Q
1701
A
L2TP UDP
13
Q
1293
A
IPSec TCP/UDP
14
Q
22
A
SSH
15
Q
989/990
A
FTP using SSL VPN
16
Q
3389
A
Remote Desktop Protocol (RDP)
17
Q
135, 137, 138, 139, 445
A
NetBIOS TCP (5)
18
Q
111
A
RPC
19
Q
53
A
DNS TCP/UDP
20
Q
80
A
HTTP TCP
21
Q
20, 21
A
File Transfer Protocol (FTP)
22
Q
23
A
Telnet
23
Q
67-68
A
DHCP
24
Q
161/162
A
SNMP UDP
25
22
SCP
26
69
Trivial File Transport Protocol (TFTP) TCP
27
1433
Microsoft SQL
28
465
Secure SMPT with SSL
29
995
Secure POP3 with SSL
