Netopia 4753 manual Change Input Filter EnabledYes ForwardYes Source IP Address

12-24 Administration Guide

For Input Filter 2 set the Protocol Type to allow GRE 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

In the Display/Change IP Filter Set screen select Display/Change Output Filter.

Display/Change Output Filter screen

+-#----	Source IP Addr----	Dest IP Addr------	Proto-Src.Port-D.Port--			On?-Fwd-+
+-------------------------------------------------------------------------						+
1	0.0.0.0	0.0.0.0	TCP	NC	=1723	Yes Yes
2	0.0.0.0	0.0.0.0	GRE	--	--	Yes Yes

For Output Filter 1 set the Protocol Type and Destination Port information as shown below.

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:	TCP
Source Port Compare...	No Compare
Source Port ID:	0
Dest. Port Compare...	Equal
Dest. Port ID:	1723
Established TCP Conns. Only:	No