I am behind the stateful firewall and I have a problem in establishing data connection from my Windows PC(which is behind firewall)with many FTP servers(I tried Agrosoft,Bison etc,,)
I understood in ACTIVE mode, data connection is started by the ftp server from local
data port which is 20. But Bison and other FTP server is not always using local data port
as 20 and hence Firewall is dropping the packet. We could see from the logs that
the packet dropped has server's local port as an unpriviledged port (> 1024).
What will be the solution for this issue other than using passive mode??has anybody faced this similar type of issue and your firewall is allowing this??(understanding that this is only response to the control connection which is already open and not a new request from outside eventhough FTP server uses other than port 20 for data connection)
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...