[lug] ftp access through ipchains/masq

charles at lunarmedia.net charles at lunarmedia.net
Wed Apr 25 12:23:17 MDT 2001


as if my day could not get a bit more annoying.

i have a machine running ipchains that is also doing masquerading.

i try to cli ftp to a remote host from a linux client on the inside and
all is fine. when i ftp to the same remote host via a windows box i
connect, however when i try 'ls' i get the error stating that the "can't
build a data connection: connection refused"

when i run tcpdump, i see pretty much the same ports being used for
connectivity by both hosts. i've ran the sniffer from the inside lan as
well as the outbound public interface on the firewall box.

both conversations look very similar, so i really don't get what the
problem is. please refrain from any windoze comments :)

thanks -charles




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