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000288_fdc@watsun.cc.columbia.edu_Fri Jul 27 10:23:38 EDT 2001.msg
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Article: 12638 of comp.protocols.kermit.misc
Path: newsmaster.cc.columbia.edu!watsun.cc.columbia.edu!fdc
From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: HELP! kermit * modem keeps dropping from panix.com (in NYC)
Date: 27 Jul 2001 14:23:29 GMT
Organization: Columbia University
Lines: 53
Message-ID: <9jrth1$ka$1@newsmaster.cc.columbia.edu>
References: <9jr3bp$sta$1@panix2.panix.com> <9jrk4k$nlr$1@newsmaster.cc.columbia.edu>
NNTP-Posting-Host: watsun.cc.columbia.edu
X-Trace: newsmaster.cc.columbia.edu 996243809 650 128.59.39.2 (27 Jul 2001 14:23:29 GMT)
X-Complaints-To: postmaster@columbia.edu
NNTP-Posting-Date: 27 Jul 2001 14:23:29 GMT
Xref: newsmaster.cc.columbia.edu comp.protocols.kermit.misc:12638
In article <9jrk4k$nlr$1@newsmaster.cc.columbia.edu>,
Jeffrey Altman <jaltman@watsun.cc.columbia.edu> wrote:
: I would say that 99% of users these days use PPP connections
: when they dial into a Unix host. Even when they simply want
: shell access. Use PPP first, and then telnet to the host.
:
: Since you do not describe the circumstances under which you
: are losing the connection, I cannot comment further.
:
I think the attraction of Panix is that it is one of the few
places that still offers direct dialin shell accounts.
: In article <9jr3bp$sta$1@panix2.panix.com>,
: David Combs <dkcombs@panix.com> wrote:
: : ...
: : Nonetheless, I'm still getting knocked off all the time.
:
This is either because you have been exceeding some kind of
idle limit on the Panix end, or because of bad connections,
perhaps exacerbated by modem incompatibilities.
: : Question: do you happen to have access to a SUN?
:
Yes, we have have Suns. And we discovered some months ago that
C-Kermit did not handle hardware flow control properly in
recent Solaris versions (I'm not sure exactly where the cutoff
is, but it appears that Solaris changed its hardware flow
control API somewhere after 2.1 and before 2.6). This would
not necessarily explain disconnections, but in any case you
should be using the most recent C-Kermit 7.0 Beta, which has
been thoroughly checked out on Solaris dialup connections:
http://www.columbia.edu/kermit/ck80.html
If that makes no difference then, assuming the problem is not
idle time, the next place to look is your modem. After your
connection is dropped, do this:
C-Kermit> set carrier-watch off
C-Kermit> connect
and now type the modem's command to display statistics about
its most recent connection. The command depends on the make
and model of the modem, but is usually ATIn, where n is a
digit, like '6'. The better modems will give you counts of
block errors, retrains, and so forth, and will even list the
disconnection reason. If it's "host hung up" or "remote
disconnect", the problem is on the Panix end. It might even
be some kind of weird interaction of your modem and theirs,
and maybe the problem would vanish if you tried a different
kind of modem.
- Frank