ports Flashcards

1
Q

20 and 21

A

FTP (TCP), 20 for data and 21 for connection/command/control

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2
Q

22

A

SSH, SCP, and SFTP (TCP)

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3
Q

23

A

Telnet

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4
Q

25

A

SMTP (TCP), outgoing email

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5
Q

49

A

TACACS/TACACS+ (TCP or UDP)

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6
Q

53

A

DNS (UDP for queries, TCP for zone-transfers)

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7
Q

69

A

TFTP (UDP)

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8
Q

80

A

HTTP (TCP)

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9
Q

88

A

Kerberos

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10
Q

110

A

POP3 (TCP), incoming email. port 995 is POP over SSL

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11
Q

123

A

NTP (network time protocol, UDP)

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12
Q

143

A

IMAP (TCP), also for incoming email

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13
Q

161

A

SNMP (version 3 is most secure)

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14
Q

389

A

LDAP (non-secure)

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15
Q

443

A

SSL and HTTPS (TCP) (SSL is used for a secure connection via web browser)

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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)