103
Service Acronyms
The following information is related to the Firewall options (High, Medium,
and Low) section in the “Advanced Setup” chapter of this manual. This appendix
explains the meaning of the service acronyms included with the various levels of
firewall security, and the
UDP
and
TCP
ports used by each service.
Service Acronym Definitions
DNS
D
omain
N
ame
S
ystem. A data query system used to translate host names into
Internet addresses (i.e., www.somewebsite.com translates to
888.999.000.111
).
Uses
UDP
53 and
TCP
53.
EPMAP
E
nd
P
oint
Map
per. Uses
UDP
135 and
TCP
135.
FTP
F
ile
T
ransfer
P
rotocol. A protocol used to transfer files over the Internet. Uses
TCP 20
and
21
.
HTTP
H
yper
T
ext
T
ransfer
P
rotocol. This protocol delivers information over the
Internet, and is used when a computer connects to a Web site via an Internet
browser. Uses
TCP 80
.
HTTPS
H
yper
T
ext
T
ransfer
P
rotocol using
S
ecure Socket Layer. A secure version of the
protocol that delivers information over the Internet. Uses
UDP
443 and
TCP
443.
F
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