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solaris ports usage

hi,
   I notice that application on solaris uses very
high port number, like 35000, when it tries to talk to the server.  I have an application running on port 1461,
when the client send a request to the server,
its destination port is 1461, and the source port
is 45009, which 45009 so big?  Is there a range
of ports that solaris uses?


thanks in advance
0
siunix
Asked:
siunix
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1 Solution
 
nebekerCommented:
Ports go from 0 to 65535.  Anything below 1024 is considered "reserved", and you must be running as root to listen on those ports...
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siunixAuthor Commented:
why does the apps use big port like 45000?
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nebekerCommented:
It is arbitrary.  An application can use any port it wants (above 1024), so developers tend to choose large number that probably won't conflict with other applications.

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ahoffmannCommented:
developers tend to use socket() call to get a free socket/port for the system, its number is random if not explicitely requested. See man socket, man connect.
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nebekerCommented:
That's only true for a client program, of course :)

A server type program wouldn't function very well if the clients didn't know where to find it...
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nebekerCommented:
Has your question been answered?  If so, please accept one of the above comments as an answer and close this question.
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