Netopia 4541, 4542 manual Atmp example

10-26 User’s Reference Guide

Select Output Filter 2 and press Return. In the Change Output Filter 2 screen, set the Protocol Type to allow GRE as shown below.

Change Output 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

ATMP example

To enable a firewall to allow ATMP traffic, you must provision the firewall to allow inbound and outbound UDP packets specifically destined for port 5150. The source port may be dynamic, so often it is not useful to apply a compare function on this portion of the control/negotiation packets. You must also set the firewall to allow inbound and outbound GRE packets (Protocol 47, Internet Assigned Numbers Document, RFC 1700), 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	System
Menu	Configuration

Select Display/Change Input Filter.

Display/Change Input Filter screen

Filter Sets

Display/Change

Filter Set

Basic

Firewall

+--#----	Source IP Addr----	Dest IP Addr------	Proto-Src.Port-D.Port--			On?-Fwd--	+
+---------------------------------------------------------------------------							+
1	0.0.0.0	0.0.0.0	TCP	NC	=2000	Yes No
2	0.0.0.0	0.0.0.0	TCP	NC	=6000	Yes No
+---------------------------------------------------------------------------							+