Re: localhost port used for help

Violaine Batthish <[email protected]> Sat, 29 Jan 2005 08:38:01 -0500
Newsgroups gmane.comp.systems.as400.code
Message-ID <OF2714A8D7.6CC287A3-ON85256F98.004A6F72-85256F98.004AE475@ca.ibm.com>



A small update:

The CODE help team has forwarded the concerns presented here to the help
system provider.
They have requested (as apparently this has come up before), that the port
for the help system be configurable.

Also, a small clarification:

Apparently, the help is not so much random, as "automatically determinant".
It starts out with port 49214 (since it knows that the old help system used
49213).  If that port is not available, then it picks another. If the new
one isn't available, it chooses again.  And so on, until it finds a free
port.

thanks,

Violaine Batthish
WebSphere Development Studio Client, IBM Toronto Lab



code400-l-bounces-Zwy7GipZuJhWk0Htik3J/[email protected] wrote on 01/20/2005 01:18:06 PM:

> > The new help system randomizes the port
> > number used which can cause
> > problems with firewalls
>
> That's not good at all.  Other TCP/IP programs that do this (like FTP)
> often have a way to turn that behaviour off (in FTP, it's SENDPASV.)
> Several things to relay to the help team:
>
> Does this use the portmapper to determine an available port?
> Is this for Code only, or for Lpex, too?
>
> Thanks for being the messenger, Violaine.  It's not a happy job, but
> we're glad to have you pulling for us!
>   --buck
>
>
>
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