ZyXEL Communications ZYWALL 5 - Page 223

ZyWALL 5 Support Notes
All contents copyright (c) 2006 ZyXEL Communications Corporation.
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1.2.1.1  Block MSN (Chat, File transfer)
Select Drop Packet in the Action field of all the MSN related signatures.
1.2.1.2  Block MSN (Chat only, no File transfer)
Select Drop Packet in the Action field of the MSN file transfer related signatures and keep
other signatures No Action.