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Re: [FW-1] Connection reset after login to FTP server?


  • To: [email protected]
  • Subject: Re: [FW-1] Connection reset after login to FTP server?
  • From: Kevin Martin <[email protected]>
  • Date: Wed, 2 Jan 2002 14:27:28 -0600
  • Reply-to: Mailing list for discussion of Firewall-1 <[email protected]>
  • Sender: Mailing list for discussion of Firewall-1 <[email protected]>
  • Thread-index: AcGTyRXK4uMp4P+JEdW9hwDQt8hU6gAAmWOg
  • Thread-topic: [FW-1] Connection reset after login to FTP server?

Some ftp servers want to know who you are coming in (name resolution).  If they can't do a reverse lookup on your ip address they may send an ident request.  When this fails, they drop the connection.  This is what I suspect is happening to your connection.

Kevin Martin            [email protected]
Stafford Trading Inc.   Chief Security Officer
Chicago, IL  60604      TEL230 S. LaSalle, Ste. 688

 -----Original Message-----
From:   Ed E. Valasek [mailto:[email protected]]
Sent:   Wednesday, January 02, 2002 1:50 PM
To:     [email protected]
Subject:        [FW-1] Connection reset after login to FTP server?

Hi there! I am having issues with 4.1 SP5 with FTP outbound. Most FTP servers do not give me an issue, but one specific one does.

        On the perimeter net I have no problem, but when going through the FW I get the logon/pass, then after I successfully login, I get a connection closed by remote host. Anybody else experience this also?

The only logged event I see is a dropped ident packet, other than that I see nothing else getting dropped. Thanks in advance for any help!

Thanks, -Ed-

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