Two different packet types need to be discarded. We’ll build these two rules on the NetBuilder, tell it to discard packets matching these rules, set the default action of other packets to “forward” (essential for the rest of your network traffic!), then activate the service.
Note that !1 and !2 are FILTER RULE NUMBERS, NOT path or port numbers. The IP filter service is global across all ports.
Implementation
add !1 -ip filter %2:%002c, %9:%06, %28:%0000da00
add -ip filteraddrs all >all discard ip 1
add !2 -ip filter %9:%06, %2d:%00, %2e:%cb00, %28:%0000da00
add -ip filteraddrs all > all discard ip 2
setd -ip filterdefaction = forward
setd -ip control = filter
Line 1 says:
Add a filter (filter number 1)
At offset 02h find the value 002c (packet length is 44 bytes – 40 bytes header, 4 bytes data)
At offset 09h find the value 06 (packet is of type TCP)
At offset 28h find the value 0000da00 (first (and only) four data bytes are 00 00 da 00)
Line 2 says:
Filter on al