I have trouble with FTP connections using a ASA5510.
I have 3 LANs connected to the FW:
LAN1 (inside): 172.16.1.0/24
LAN2 (outside) 10.52.64.0/24
LAN (DMZ) 172.16.0.8/29
My FTP server (IIS FTP Server)is on the DMZ with IP address 172.16.0.10.
The FTP traffic between outside and DMZ is configurated and works fine (connection, PUT, GET...)
But, the FTP traffic between inside and DMZ doesn't work properly.
The autehntification on the FTP server is OK but, after few seconds, I always have a disconnection message "connection closed by remote host"...
I have try using "no ftp mode passive" or "ftp mode passive" but it's the same.
The ports allowed are TCP 20 and TCP 21.
Anyone have an idea to fix this issue ?