Pptp Example - Netopia 4741 2A4NA Administration Manual

PPTP example

To enable a firewall to allow PPTP traffic, you must provision the firewall to allow inbound and outbound TCP
packets specifically destined for port 1723. The source port may be dynamic, so often it is not useful to apply
a compare function upon this portion of the control/negotiation packets. You must also set the firewall to allow
inbound and outbound GRE packets, enabling transport of the tunnel payload.
From the Main Menu navigate to Display/Change IP Filter Set, and from the pop-up menu select Basic Firewall.
Main
Menu Configuration
Select Display/Change Input Filter.
Display/Change Input Filter screen
+-#----Source IP Addr----Dest IP Addr------Proto-Src.Port-D.Port--On?-Fwd-+
+-------------------------------------------------------------------------+
| 1 0.0.0.0
| 2 0.0.0.0
|
For Input Filter 1 set the Destination Port information as shown below.
Enabled:
Forward:
Source IP Address:
Source IP Address Mask:
Dest. IP Address:
Dest. IP Address Mask:
Protocol Type:
Source Port Compare...
Source Port ID:
Dest. Port Compare...
Dest. Port ID:
Established TCP Conns. Only:
System Filter
Sets
0.0.0.0
0.0.0.0
Change Input Filter 1
Virtual Private Networks (VPNs) 11-23
IP Filter Display/Change
Sets IP Filter Set
TCP NC =1723
GRE -- --
Yes
Yes
0.0.0.0
0.0.0.0
0.0.0.0
0.0.0.0
TCP
No Compare
0
Equal
1723
No
Basic
Firewall
Yes Yes |
Yes Yes |
|