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How do I block Net BIOS messages ?

 
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Joined: 09 Oct 2002
Posts: 175
Location: Lausanne, Switzerland
PostPosted: Fri Jan 24, 03 8:54    Post subject: How do I block Net BIOS messages ? Reply with quote
Net BIOS messages are the most common source of ISDN line openings. Most people prefer to stop these data packets from leaving their LAN. Below is a group of filters to block these messages.

Code:
# --- NetBIOS Filter Configuration
IP Filter Deny From Any To Any Port 137 .. 139/udp
IP Filter Deny From Any To Any Port 137 .. 139/tcp
IP Filter Deny From Any Port 137 .. 139/udp To Any Port 1 .. 65535/udp
IP Filter Deny From Any Port 137 .. 139/tcp To Any Port 1 .. 65535/tcp
IP Filter Allow From Any To Any
IP Filter On
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