Well-known Ports - Service to Ports Flashcards
1
Q
FTP Data
A
TCP 20
2
Q
FTP Control
A
TCP 21
3
Q
SSH
A
TCP 22
4
Q
Telnet
A
TCP 23
5
Q
SMTP
A
TCP 25
6
Q
DNS
A
UDP/TCP 53
7
Q
DHCP Server
A
UDP 67
8
Q
DHCP Client
A
UDP 68
9
Q
TFTP
A
UDP 69
10
Q
HTTP
A
TCP 80
11
Q
POP3
A
TCP 110
12
Q
SNMP
A
UDP 161
13
Q
SSL
A
TCP 443
14
Q
Syslog
A
UDP 514
15
Q
RTP Voice/Video
A
UDP 16,384 to 32,767
16
Q
GRE
A
IP 47
17
Q
BGP
A
TCP 179
18
Q
TACACS+
A
TCP 49
19
Q
RIP
A
UDP 520
20
Q
OSPF
A
IP 89
21
Q
EIGRP
A
IP 88
22
Q
RADIUS Authentication (per RFC)
A
TCP/UDP 1812
23
Q
IGMPv2
A
IP 2
24
Q
PIM Control
A
IP 103
25
Q
NTP
A
UDP 123
26
Q
IPSec Authentication Header (AH)
A
IP 51
27
Q
ISAKMP
A
UDP 500
28
Q
ESP
A
IP 50
29
Q
LISP Data Plane header
A
UDP 4341
30
Q
LISP Control Plane i.e. Map Notify Msg
A
UDP 4342
31
Q
VXLAN (IANA)
A
UDP 4789
32
Q
VXLAN (Linux)
A
UDP 8472
33
Q
RADIUS Accounting (Cisco)
A
TCP 1646
34
Q
RADIUS Accounting (per RFC)
A
TCP/UDP 1813
35
Q
Traceroute
A
IP 33434
36
Q
RADIUS Authentication (Cisco)
A
TCP 1645
37
Q
VRRPv3
A
IP 112
38
Q
HSRPv1 and v2
A
UDP 1985
39
Q
HSRP for IPV6
A
UDP 2029
40
Q
Syslog over TLS
A
TCP 6514
41
Q
TCP
A
IP 6
42
Q
UDP
A
IP 17
