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- From: brutond@p4.cs.man.ac.uk (Dave Bruton)
- Newsgroups: comp.unix.questions
- Subject: 'talk' command
- Summary: Need help with understanding 'talk' on Sun machines
- Keywords: talk BSD Sun
- Message-ID: <brutond.721487230@p4.cs.man.ac.uk>
- Date: 11 Nov 92 13:07:10 GMT
- Sender: news@cs.man.ac.uk
- Lines: 42
-
-
- Dear all,
-
- I need help with understanding how the 'talk' command works. Any help
- would be greatly appreciated, or references to books or other newsgroups
- etc.
-
- My problem is that I cannot use the 'talk' command with anyone on a
- non-Sun machine from our network of Suns. I appreciate that this is a
- well known problem. Everyone I speak to tells me it's a well known
- problem, but no-one has been able to explain why.
-
- I have downloaded various talk clients, to look at there source. Most
- if not all of them use the ntalk/udp service. Suns appear to have only
- the talk/udp service (517), but I looked at a non-Sun, and they appear
- to have both talk(517) and ntalk(518). I don't understand why there are
- TWO services for talk on these machines, and I certainly don't understand
- why it is not possible for a Sun to join in.
-
- I worked at ICL for a short while this summer, and during my stay I
- learnt that Suns are notoriously awkward for connecting onto internet
- networks anyway, due to the large number of packets they throw backward
- and forward at each other that no other machine can understand. I belive
- a filter needs to be put between Suns and other machines to prevent them
- from falling over.
-
- Could it be this filter that screws up talk packets? Some packets do
- apparently get through, since talk usually complains [No connection] when
- none get through. 'talk' gets past this stage, up to the [invitation]
- stage. That's what makes me even more confused, and certainly
- breaks my theory that these filters were a really simple design which
- just throws away all UDP packets!
-
- PLEASE HELP. I need an understanding of this. Many thanks,
- Dave.
-
-
- --
- Dave Bruton. "It is impossible to enjoy idling thoroughly
- brutond@cs.man.ac.uk unless one has plenty of work to do."
- 4 Beresford St, Moss Side, - J K Jerome
- Manchester M14 4SB. (ENGLAND) Tel: 061 227 9426
-