Netopia R2020 User Reference Manual page 224

14-20 User's Reference Guide
FTP sessions. To allow WAN-originated FTP sessions to a LAN-based FTP server with the IP address a.b.c.d
(corresponding to a numbered IP address such as 163.176.8.243), insert the following input filter ahead of the
current input filter 1:
Enabled: Yes
Forward: Yes
Source IP Address: 0.0.0.0
Source IP Address Mask: 0.0.0.0
Dest. IP Address: a.b.c.d
Dest. IP Address Mask: 255.255.255.255
Protocol Type: TCP
Source Port Comparison: No Compare
Source Port ID: 0
Dest. Port Comparison: Equal
Dest. Port ID: 21
Note: A similar filter could be used to permit Telnet or WWW access. Set the Dest. Port ID to 23 for Telnet or
80 for WWW.
AURP tunnel. To allow an AURP tunnel between a remote AURP router with the IP address a.b.c.d
(corresponding to a numbered IP address such as 163.176.8.243) and a local AURP router (including the
Netopia R2020 itself), insert the following input filter ahead of the current input filter 1:
Enabled: Yes
Forward: Yes
Source IP Address: a.b.c.d
Source IP Address Mask: 255.255.255.255
Dest. IP Address: 0.0.0.0
Dest. IP Address Mask: 0.0.0.0
Protocol Type: UDP
Source Port Comparison: Equal
Source Port ID: 387
Dest. Port Comparison: Equal
Dest. Port ID: 387