Ports

Last Updated : Sep 29, 2023 |
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The port being used by a data packet is displayed as src= followed by a port number.
For the following ports, SysMonitor also adds the protocol name taken from http://www.iana.org/assignments/port-numbers. For example src=23 is displayed as src=23 (Telnet).
Number
Protocol
20
File Transfer [Default Data]
21
File Transfer [Control]
23
Telnet
25
Simple Mail Transfer
37
Time
43
Who Is
53
Domain Name Server
67
Bootstrap Protocol Server
68
Bootstrap Protocol Client
69
Trivial File Transfer
70
Gopher
79
Finger
80
World Wide Web-HTTP
115
Simple File Transfer Protocol
123
Network Time Protocol
137
NETBIOS Name Service
138
NETBIOS Datagram Service
139
NETBIOS Session Service
156
SQL Service
161
SNMP
162
SNMPTRAP
179
Border Gateway Protocol
1719
H.323Ras
1720
H.323/H.245
1764
NA Monitor
1765
NA BLF/TAPI
1766
NA PCPartner
1755
NA Who-Is response
3851
NA Voicemail
3852
NA Network DTE
3867
NA SoloMail
50791
IPO Voicemail
50792
IPO Network DTE
50793
IPO Solo Voicemail
50794
IPO Monitor
50795
IPO Voice Networking
50796
IPO PCPartner
50797
IPO TAPI
50798
IPO Who-Is response
50799
IPO BLF
50800
IPO License Dongle
54050
BT Fusion
Related links
IP Office Ports