Well-Known TCP/UDP Port Numbers
Port numbers are divided into three ranges: Well Known Ports, Registered Ports, and Dynamic
and/or Private Ports. Well Known Ports are those from 0 through 1023. Registered Ports are
those from 1024 through 49151. Dynamic and/or Private Ports are those from 49152 through
65535.
Well Known Ports are assigned by IANA, and on most systems, can only be used by system
processes or by programs executed by privileged users. Table below shows some of the well-
known port numbers. For more details, please visit the IANA website:
http://www.iana.org/assignments/port-numbers
Port
Number
Protocol
TCP/UDP
21
FTP (File Transfer Protocol)
TCP
22
SSH (Secure Shell)
TCP
23
Telnet
TCP
25
SMTP (Simple Mail Transfer Protocol)
TCP
37
Time
TCP, UCP
39
RLP (Resource Location Protocol)
UDP
49
TACACS,
UDP
53
DNS
UDP
67
BOOTP server
UDP
68
BOOTP client
UDP
69
TFTP
UDP
70
Gopher
TCP
79
Finger
TCP
80
HTTP
TCP
110
POP3
TCP
119
NNTP (Network News Transfer Protocol)
TCP
161/162
SNMP
UDP
443
HTTPS
TCP
IP-KVM TCP port number
Port
Protocol
Purpose
23
Telnet over TCP
Web & Telnet client
80
HTTP over TCP
Web
443
HTTPS over TCP
Web
443
RFB over TCP
Remote Console
443
HTTPS over TCP
Drive Redirection
139
SMB over TCP
CD-ROM Image (Samba Service)
139
SMB over TCP
Floppy disk(Samba Service)
1024
SMB over TCP
Samba Service source port
162
SNMP over TCP
SNMP trap reception port
1024
SNMP over TCP
SNMP source port
443
RFB over TCP
Remote Keyboard and Mouse data
58
Remark for older versions purchased before March 2014
Note referring to Java Update 7.51 problem for already installed devices
With Java update 7.51 mid-January 2013 Oracle has enabled new security features. This
update prevents to run unsigned Java applets. To resolve this problem for our KVM over IP
switches No. 39414, 39415, 39432 and 39636 we have published LINDY signed KVM tools and
certificates, together with a new firmware for our KVM over IP switches. For already installed as
well as older devices please download the new firmware from the following link
39414 and 39415:
http://download.lindy.com/download/de/KVM_over_IP/KVMoverIPFirmwareUpgrade.zip
39432 and 39636:
http://download.lindy.com/download/de/KVM_over_IP/KVMoverIPMudolesFirmwareUpgrade.zip
and follow exactly the included installation instructions.
Alternatively, users who have installed the Java Update 7.51, can still for some time run the old
tools
following
Oracle's
workaround:
https://blogs.oracle.com/java-platform-
group/entry/upcoming_exception_site_list_in
Open your local Java Console and add the URL of your KVM over IP switches to the
exception_site_list (Java / Security: Exception Site List). Anyhow, you will receive various Java
security warnings at the start of each session and Oracle may close this option by one of the
next updates.
27 January 2014.
