ISA Server 2006 seems to be doing odd things to outbound ftp connections
Posted on 2009-04-07
I have an unrestricted traffic rule for all protocols set, however any pc inside my network cannot make properly successful outbound ftp connections,
they authenticate to the external server, but when they issue LS, they get the message "connection closed by remote host"
this doesn't make sense, I have another ISA 2006 server on another site configured with the same rules, and all FTP outbound connections work fine from that site.
I have checked the logging on the ISA server and it is very unhelpful simply showing an FTP connection open, then the next message is ftp connection closed.