
Virtual Private Networks (VPNs) 10-147 
Select Input Filter 1 and press Return. In the Change Input Filter 1 screen, set the Destination Port information as shown below.
Change 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:  | 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  | 
Select Input Filter 2 and press Return. In the Change Input Filter 2 screen, 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 |