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NDAS-N. User Manual.
52
Fig. 11.2. Firewall. Parameters configuring
Refer to section
4.5 NDAS-RT Network Model
of this Manual for details on the port numbers
used.
11.3 Firewall. FTP connections
The FTP server uses additional ports to establish connections in a passive mode. For this, a special
scenario is provided: if there is the FTP server port (
21
) in the whitelist of ports, then the Firewall module
additionally opens the TCP port range of
49152:49168
. The same range is registered in the FTP server
configuration by default.
Safety considerations
The NDAS-RT firewall implements only basic rules for restricting access to the device and does not
guarantee complete security and protection of the system from hacking and unauthorized access. In
particular, Firewall does not provide:
