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Groups > comp.lang.java.programmer > #34533

Re: Picking an unused port number

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On 6/6/2016 11:07 PM, Arne Vajhøj wrote:
> On 6/6/2016 9:45 PM, Jerry Stuckle wrote:
>> On 6/6/2016 9:28 PM, Arne Vajhøj wrote:
>>> On 6/6/2016 8:52 PM, Jerry Stuckle wrote:
>>>> On 6/6/2016 6:44 PM, Wayne wrote:
>>>>> On 6/4/2016 8:50 PM, Jerry Stuckle wrote:
>>>>>> On 6/4/2016 11:24 AM, nathanturner369@gmail.com wrote:
>>>>>>>> So, in general, is there any rule you should use when selecting a
>>>>>>>> port
>>>>>>>> number, other than picking one > 1024?
>>>>>>>
>>>>>>
>>>>>> Make it configurable, and > 4095, not 1024.
>>>>>
>>>>> Why?
>>>>>
>>>>
>>>> Ports 0-4095 are reserved.
>>>
>>> ????
>>>
>>> 0-1023 are system ports
>>> 1024-49151 are registered ports
>>> 49152–65535 are ephemeral ports
>>>
>>> 80XX port numbers are very frequently used in the Java world.
>>>
> 
>> If 1024-49151 are registered ports, then why would 80xx ports be used in
>> the Java world?
> 
> Many possible reasons:
> - they may have been assigned to the Java purpose
> - they may have been assigned to a general purpose that is compatible
> with Java usage
> - they may not have been assigned yet
>

"May" does not work.  Which is it?

>> 0-4095 are generally considered "reserved" by commonly used protocols.
>> Others are used by other protocols, but not generally considered "in
>> use".
> 
> That is not how IANA looks at it.
> 
> Arne
> 
> 

Whatever.  You're the expert on EVERYTHING.  Trolls always are.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
jstucklex@attglobal.net
==================

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Re: Picking an unused port number nathanturner369@gmail.com - 2016-06-04 08:24 -0700
  Re: Picking an unused port number Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-06-04 09:56 -0700
    Re: Picking an unused port number Eric Douglas <e.d.programmer@gmail.com> - 2016-06-06 05:28 -0700
      Re: Picking an unused port number Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-06-06 15:40 -0700
        Re: Picking an unused port number Nigel Wade <nmw@ion.le.ac.uk> - 2016-06-07 09:43 +0100
          Re: Picking an unused port number Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-06-07 07:43 -0700
            Re: Picking an unused port number Nigel Wade <nmw@ion.le.ac.uk> - 2016-06-07 17:28 +0100
              Re: Picking an unused port number Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-06-07 09:40 -0700
                Re: Picking an unused port number Nigel Wade <nmw@ion.le.ac.uk> - 2016-06-08 10:32 +0100
                Re: Picking an unused port number Eric Douglas <e.d.programmer@gmail.com> - 2016-06-08 06:45 -0700
                Re: Picking an unused port number Nigel Wade <nmw@ion.le.ac.uk> - 2016-06-08 15:06 +0100
                Re: Picking an unused port number Eric Douglas <e.d.programmer@gmail.com> - 2016-06-08 07:36 -0700
                Re: Picking an unused port number Martin Gregorie <martin@address-in-sig.invalid> - 2016-06-08 18:03 +0000
  Re: Picking an unused port number Jerry Stuckle <jstucklex@attglobal.net> - 2016-06-04 20:50 -0400
    Re: Picking an unused port number Wayne <wayne@nospam.invalid> - 2016-06-06 18:44 -0400
      Re: Picking an unused port number Jerry Stuckle <jstucklex@attglobal.net> - 2016-06-06 20:52 -0400
        Re: Picking an unused port number Arne Vajhøj <arne@vajhoej.dk> - 2016-06-06 21:28 -0400
          Re: Picking an unused port number Jerry Stuckle <jstucklex@attglobal.net> - 2016-06-06 21:45 -0400
            Re: Picking an unused port number Arne Vajhøj <arne@vajhoej.dk> - 2016-06-06 23:07 -0400
              Re: Picking an unused port number Jerry Stuckle <jstucklex@attglobal.net> - 2016-06-07 09:50 -0400
                Re: Picking an unused port number Lew <lewbloch@gmail.com> - 2016-06-07 13:46 -0700
                Re: Picking an unused port number Jerry Stuckle <jstucklex@attglobal.net> - 2016-06-07 19:31 -0400
                Re: Picking an unused port number Lew <lewbloch@gmail.com> - 2016-06-07 17:26 -0700
                Re: Picking an unused port number Jerry Stuckle <jstucklex@attglobal.net> - 2016-06-07 21:34 -0400
                Re: Picking an unused port number Lew <lewbloch@gmail.com> - 2016-06-08 13:52 -0700
                Re: Picking an unused port number Jerry Stuckle <jstucklex@attglobal.net> - 2016-06-08 17:49 -0400
                Re: Picking an unused port number Arne Vajhøj <arne@vajhoej.dk> - 2016-06-07 21:53 -0400
        Re: Picking an unused port number a.laforgia@gmail.com - 2016-06-07 00:11 -0700

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