Netopia 4752 - Manual (Page 170)

12-28 Administration Guide
For Input Filter 2 set the Protocol Type to allow GRE as shown below.
In the Display/Change IP Filter Set screen select Display/Change Output Filter.
Display/Change Output Filter screen
For Output Filter 1 set the Protocol Type and Destination Por t information as shown below.
Change Input Filter 2
Enabled: Yes
Forward: Yes
Source IP Address: 0.0.0.0
Source IP Address Mask: 0.0.0.0
Dest. IP Address: 0.0.0.0
Dest. IP Address Mask: 0.0.0.0
Protocol Type: GRE
+-#----Source IP Addr----Dest IP Addr------Proto-Src.Port-D.Port--On?-Fwd-+
+-------------------------------------------------------------------------+
| 1 0.0.0.0 0.0.0.0 UDP NC NC Yes Yes |
| 2 0.0.0.0 0.0.0.0 GRE -- -- Yes Yes |
| |
Change Output Filter 1
Enabled: Yes
Forward: Yes
Source IP Address: 0.0.0.0
Source IP Address Mask: 0.0.0.0
Dest. IP Address: 0.0.0.0
Dest. IP Address Mask: 0.0.0.0
Protocol Type: UDP
Source Port Compare... No Compare
Source Port ID: 0
Dest. Port Compare... No Compare
Dest. Port ID: 5150