Ports Flashcards
1
Q
20 and 21
A
FTP (TCP) (20 is for data, 21 is for connection/command/control)
2
Q
22 (TCP)
A
SSH, SCP, & SFTP (all of these are secured and encrypted)
3
Q
23
A
Telnet
4
Q
25
A
SMTP (TCP) - Outgoing email
5
Q
49
A
TACACS/TACACS+ (TCP or UPD)
6
Q
53
A
DNS (UDP for queries, TCP for zone-transfers)
7
Q
69
A
TFTP (UDP)
8
Q
80
A
HTTP (TCP)
9
Q
88
A
Kerberos
10
Q
110
A
POP3 (TCP) - Incoming email. Port 995 is POP3 over SSL (encrypted)
11
Q
123
A
NTP (Network Time Protocol. NTP-UDP-123)
12
Q
143
A
IMAP (TCP) - also for incoming email
13
Q
161
A
SNMP (version 3 is the most secure so only use this version)
14
Q
389
A
LDAP (non-secure)
15
Q
443
A
SSL and HTTPS (TCP) (SSL used for a secure connection via a web browser)
