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Billion 800VGT Router
The
Internet
Assigned
Numbers
Authority
(IANA)
is
the
central
coordinator
for
the
assignment
of
unique
parameter
values
for
Internet
protocols.
Port
numbers
range
from
0
to
65535,
but
only
ports
numbers
0
to
1023
are
reserved
for
privileged
services
and
are
designated
as
“well-known
ports”
(Please
refer
to
Table
5).
Registered
ports
are
numbered
from
1024
through
49151.
The
remaining
ports,
referred
to
as
dynamic
or
private
ports,
are
numbered
from
49152
through
65535.
For
further
information,
please
see
IANA’s
website
at:
http://www.iana.org/assignments/port-numbers
Table 5: Some Well-known and registered Ports
Port
Number
Protocol
Description
20
TCP
FTP
Data
21
TCP
FTP
Control
22
TCP
&
UDP
SSH
Remote
Login
Protocol
23
TCP
Telnet
25
TCP
SMTP
(Simple
Mail
Transfer
Protocol)
53
TCP
&
UDP
DNS
(Domain
Name
Server)
69
UDP
TFTP
(Trivial
File
Transfer
Protocol)
80
TCP
World
Wide
Web
HTTP
110
TCP
POP3
(Post
Office
Protocol
Version
3)
119
TCP
NEWS
(Network
News
Transfer
Protocol)
123
UDP
NTP
(Network
Time
Protocol)
/
SNTP
(Simple
Network
Time
Protocol)
161
TCP
SNMP
443
TCP
&
UDP
HTTPS
1503
TCP
T.120
1720
TCP
H.323
4000
TCP
ICQ
7070
UDP
RealAudio
127
Chapter
4:
Configuration