ports Flashcards
1
Q
20 and 21
A
FTP (TCP), 20 for data and 21 for connection/command/control
2
Q
22
A
SSH, SCP, and SFTP (TCP)
3
Q
23
A
Telnet
4
Q
25
A
SMTP (TCP), outgoing email
5
Q
49
A
TACACS/TACACS+ (TCP or UDP)
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 POP over SSL
11
Q
123
A
NTP (network time protocol, UDP)
12
Q
143
A
IMAP (TCP), also for incoming email
13
Q
161
A
SNMP (version 3 is most secure)
14
Q
389
A
LDAP (non-secure)
15
Q
443
A
SSL and HTTPS (TCP) (SSL is used for a secure connection via web browser)
16
Q
636
A
Secure LDAP secured with SSL or TLS
17
Q
995
A
POP3 over SSL (encrypted email retrieval)
18
Q
1433
A
MS-SQL Database
19
Q
1812-1813
A
RADIUS (UDP 1812 for authentication, UDP 1813 for accounting)
20
Q
3389
A
RDP (TCP) remote desktop
21
Q
6667
A
IRC (Internet Relay Chat)
