Great Circle Associates Firewalls
(June 1996)
 

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Subject: ftp problem
From: Darwin Martinez <Darwin_Martinez @ INS . COM>
Date: Thu, 20 Jun 1996 21:29:19 -0400
To: firewalls @ greatcircle . com

All:

When I ftp to a site, FW-1 allows the ftp connect (21) but then blocks the
return data (ftp-data 20?). My rulebase allows both ftp & ftp-data from the
internal nets outward. I'm doing NAT. After i connect, i see the actions
taking place (cd, dir, etc.) on the FTP screen, but the responses are
blocked by my inplicit deny rule I have (any,any,any,reject). Basically, I
can't see the contents of the directory that has been CD'd to.

Any ideas?? Thanks.
------------------------------------------------------------------------
Darwin L. Martinez			Email:	darwin_martinez @
 ins .
 com
Network Systems Engineer		Site #:	404-843-5954
International Network Services		Pager:	800-INS-1-INS
Atlanta Office
------------------------------------------------------------------------



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