Firewall rules for Business Communications Manager with Dialup interfaces
831
Programming Operations Guide
Firewall rules for Business Communications Manager with
Dialup interfaces
For systems with dialup interfaces (ISDN, V.90), we recommend that you add Firewall filters to
all interfaces except the dialup interface that blocks NetBIOS traffic. This prevents any NetBIOS
packets from getting into the Business Communications Manager and bringing up the dialup
interface link.
For example, if a Business Communications Manager is configured with two LANs and one ISDN
dialout interface, then these Firewall rules should be placed on both of the LANs.
Table 263
Input Rule Configuration for systems with dialup interfaces
IR1
Direction:
In
Stateful:
Yes
Disposition:
Block
Protocol:
TCP/UDP
Source IP:
0.0.0.0
Source Mask:
0.0.0.0
Source Port:
NETBIOS
Destination IP:
0.0.0.0
Destination Mask:
0.0.0.0
Destination Port:
NETBIOS
IR2
Direction:
In
Stateful:
Yes
Disposition:
Block
Protocol:
TCP/UDP
Source IP:
0.0.0.0
Source Mask:
0.0.0.0
Source Port:
NETBIOS
Destination IP:
0.0.0.0
Destination Mask:
0.0.0.0
Destination Port:
DNS
Summary of Contents for BCM 3.7
Page 4: ...4 Software licensing N0008589 3 3...
Page 32: ...32 Contents N0008589 3 3 W 937 Index 939...
Page 46: ...46 Tables N0008589 3 3...
Page 64: ...64 How to get help N0008589 3 3...
Page 90: ...90 Manually activating Telnet N0008589 3 3...
Page 116: ...116 Delayed system restart N0008589 3 3...
Page 194: ...194 Configuring a data module N0008589 3 3...
Page 276: ...276 Setting line telco features N0008589 3 3...
Page 310: ...310 Using COS passwords N0008589 3 3...
Page 364: ...364 Enhanced 911 E911 configuration N0008589 3 3...
Page 380: ...380 Renumbering DNs N0008589 3 3...
Page 398: ...398 Saving wizard pages on your computer N0008589 3 3...
Page 458: ...458 Voice Mail settings N0008589 3 3...
Page 488: ...488 Setting system telco features N0008589 3 3...
Page 508: ...508 Other programming that affects public networking N0008589 3 3...
Page 522: ...522 PRI networking using Call by Call services N0008589 3 3...
Page 592: ...592 Monitoring Hunt groups N0008589 3 3...
Page 636: ...636 Configuring Double Density N0008589 3 3...
Page 640: ...640 Using the Network Update Wizard N0008589 3 3...
Page 666: ...666 Importing and Exporting DHCP data N0008589 3 3...
Page 722: ...722 Restarting the router N0008589 3 3...
Page 726: ...726 Important Web Cache considerations N0008589 3 3...
Page 748: ...748 Configuring an Interface with NAT N0008589 3 3...
Page 794: ...794 IPSec N0008589 3 3...
Page 818: ...818 Configuring the Policy Agent characteristics N0008589 3 3...
Page 832: ...832 Firewall rules for Business Communications Manager with Dialup interfaces N0008589 3 3...
Page 876: ...876 ISDN Programming N0008589 3 3...
Page 1004: ...1004 Index N0008589 3 3...