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



Kevin Martin:
> 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.

Assuming you manage your own SOA...

Check your logs for DNS & ident queries from the FTP server.  Check your DNS
server logs for reverse lookups against the client's IP address (or against
the IP address that the client is seen as by the FTP server, if you're doing
any NATing).

If this turns out to be the case, consider putting up an rwall service so
that reverse lookups for internal user IP addresses are given a generic
response.  Info on one such service at http://cr.yp.to/djbdns/walldns.html.

Greg S.

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