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port number
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... (used in some routing protocols), protocol numbers,
port numbers, management information base object identifiers,
...
... WELL KNOWN PORT NUMBERS ...
...
The assigned ports use a small portion of the possible port numbers.
For many years the assigned ports were in the range 0-255 ...
... # automatic authentication performed
# based on priviledged port numbers
# and distributed data bases which
# identify "authentication domains ...
... REGISTERED PORT NUMBERS ...
... dlswpn 2067/udp Data Link Switch Write Port Number
ats 2201/tcp Advanced Training System Program
ats 2201/udp Advanced Training System Program
...
... greater than 5.0) "registers" the
IP port number that is allocated to a particular service when that
service is ...
... Transport
Independent RPC equivalent, take either a user specified port number
or RPC_ANY (-1) which effectively means "I don't care." In the "I
...
... if euid of the requesting process is 0 (i.e., root)
allocate the next available port number in the
reserved port range.
...
...
Port numbers count up sequentially.
...
... allocation scheme may pick an unused port that happened to correspond
to a port number that had been "assigned" but was currently unused.
...
...
There is the restriction that only "superuser" on BSD derived systems
such as SunOS can bind to a port number that is less than 1024. So
programs have used this information in the past to identify whether or
not the service ...
... gets, remote clients will query the portmapper to ask it what port
number was assigned to the service when it was started. The key is
that the port ...
... executable. (it isn't like it will change, and if they read it from
/etc/services and someone had mistyped the port number it won't
interoperate with clients anyway!)
...
... It is not practical to read the /etc/services file into the kernel to
prevent it from giving out port numbers that are "pre-assigned", nor
is it generally desirable since with the correct ordering of startup
it is completely unneccesary.
...
... UDP-based protocols, respectively. In either
case 'port' corresponds to the primary port number being
used by the protocol."
::= {assocEntry 3}
...
... UDP-based protocols. In either case 'port' corresponds to
-- the primary port number being used by the protocol. For example,
-- assuming no other OID is assigned for SMTP ...
... UDP-based protocols, respectively. In
either case 'port' corresponds to the primary port number
being used by the group. applTCPProtoID and applUDPProtoID
...