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- Newsgroups: comp.databases.informix
- Path: sparky!uunet!ddssuprs!lpc
- From: lpc@dickens.com (Luis P Caamano)
- Subject: Re: Informix I-Net problem
- Message-ID: <1992Aug27.174405.16906@dickens.com>
- Date: Thu, 27 Aug 1992 17:44:05 GMT
- References: <memo.594498@cix.compulink.co.uk>
- Organization: Dickens Data Systems, Inc.
- Lines: 32
-
- In article <memo.594498@cix.compulink.co.uk> shemminga@cix.compulink.co.uk writes:
- >
- >This may seem like a dumb question but I understand the entry that is
- >made in /etc/services is to allow tcp/ip to make connections. Would
- >having more than one entry mean that I could have more connections?
- >
-
- No. /etc/services only maps a service name to a well known port
- number that is needed to make the connection.
-
- When making a connection to a server, the client must specify the
- port number to TCP so it knows to which process (server) it should
- give the packets to. Instead of coding the number in the code, the
- client finds out what number to use at runtime. You can change the
- port number as long as it is the same on the server and client machines.
-
- This is necessary to avoid port number conflicts, e.g. Informix decides
- to use port number xxxx for Inet and then you install I-Net on a
- machine that has another application using the same port number.
- Obviously, it won't work.
-
- For more info on port numbers and /etc/services consult the Unix
- networking bible, R.Stevens's "Unix Network Programming."
-
- --
- ---------------------------------------------------------------------------
- Luis P. Caamano | lpc@dickens.com
- Dickens Data Systems, Inc. | uunet!dickens.com!lpc
- Atlanta, GA | (404) 475-8860
- ---------------------------------------------------------------------------
- If I think I know it all, I'll stop learning. -myself
- The more I learn, the more I know I know nothing. -somebody else
-