IUBio GIL .. BIOSCI/Bionet News .. Biosequences .. Software .. FTP

Ftp problems continue

Garry Martin gmartin at MendelBio.COM
Tue May 28 18:14:23 EST 2002

Hi John and David:

Our attempts to connect during the weekend were unsuccessful.

In addition, new DNS problems cropped up.  On Saturday and Sunday,
none of the three NCBI ftp hostnames could be resolved.  That
had not been a problem before.  But as of today, Tuesday, that DNS
problem has gone away, but the ftp sessions are still unsuccessful.

We thank Don Gilbert for finding an alternative way to update the 
bio-mirror.net site and thereby take some of the urgency out of this
problem for us and all concerned.  We were able to run our ftp process 
on his server, although his latest message indicates that bio-mirror.net
continues to have problems with ftp as well.

Today we tested NCBI with three other ftp clients, this time using a
Linux ftp client that defaults to passive mode, as well as ftp
from a browser, Netscape 4.7 and IE5.  None of these clients succeed.

Looking at our system firewall logs, we can see that NCBI's new ftp 
server is responding with an ident request, probably for rarp purposes.
We normally drop ident, but for these tests we made sure to allow them.
The result is the same -- a partial display of your banner message
and an unresponsive session, as shown here, using the Linux ftp client:

ftp -p ftp1.ncbi.nih.gov
Connected to ftp1.ncbi.nih.gov (
 Warning Notice!

After several minutes we give up and interrupt.  We wonder if the ftp
server's banner message (the rest of "Warning Notice!...") is too 
long or was created with DOS-style CR+NL line termination?  Those
things can sometimes cause trouble.  If you know of another ftp site
that is using the same ftp server that NCBI has just installed, please
send me the URL and I will attempt a test session there as well.

Garry Martin
Mendel Biotechnology, Inc.

>To: Garry Martin <gmartin at MendelBio.COM>
>Cc: genbankb at net.bio.net, cavanaug at ncbi.nlm.nih.gov, gilbertd at bio.indiana.edu, 
systems at ncbi.nlm.nih.gov
>Subject: Re: Ftp problems continue
>From: janderso at ncbi.nlm.nih.gov (John S. J. Anderson)
>Date: 25 May 2002 00:20:09 -0400
>>>>>> "Garry" == Garry Martin <gmartin at MendelBio.COM> writes:
>> As of Friday evening, May 24, at 8:00 PM Pacific, we are unable to
>> conduct an ftp session with ftp.ncbi.nih.gov.  Nor can we run a
>> process using the alternate addresses, ftp2.ncbi.nih.gov and
>> ftp1.ncbi.nih.gov.  Our ftp clients are able to connect and login,
>> so it is not a DNS problem, but the sessions are then completely
>> unresponsive.  Here is the full extent of a session using NcFTP from
>> Solaris command line:
>Garry --
>Additionally, some people have had success using a client that
>defaults to passive-mode FTP -- I don't know if NcFTP defaults to
>passive or not; I know the Solaris 'ftp' command can _not_ do
>passive. You might want to try connecting via Netscape, as it seems to
>default to passive and has allowed some people who couldn't previously
>connect to do so. 
>Please let me know if you have any other questions; I'll be monitoring
>my email over the weekend.


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