Vulnerability Development mailing list archives

Re: PORT or PASV mode of IIS 4.0's FTP


From: Makoto Shiotsuki <shio () ST RIM OR JP>
Date: Mon, 7 Aug 2000 13:39:45 +0900


The ftp client is trying to "get" 15,000 1-K files from the IIS's FTP server,
the connection is killed by FW-1 after it got 100 files.  The fw-log shows that
when the client's "source port" hit a "pre-defined service (port) in the
rulebase, the connection is dropped.  CP explained that FW-1 thought that it
was a security violation.



FW-1 doesn't like to open ftp-data-ports which are defined
in FW-1 as "service".  This may be the cause of the problem.

Check out http://www.phoneboy.com/fw1/faq/0106.html

Makoto Shiotsuki


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