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Anyone know of a Free Packet filtering Program?

wnied

wnied

Diamond Member
I'm going to be running a 15 computer LAN on a SDSL connection soon and want a packet filter to examine incoming and outgoing data packets from my gateway. Anyone know of a good Free Packet filter?

Thanks in advance.
wnied
 
I think you are referring to packet capture applications. Check the net for "network monitor." I believe it's free and does the job nicely.
 
Packet filtering and packet capturing are different. If you want "packet filtering" aka firewall, look at IPFilter, Packet Filter, IPTables, IPChains, or zone alarm. Maybe outppost (but I have never used it and it is beta).

IPFilter can run on various UNIX-like systems. (do a google search for IPF and Darren Reed)
Packet Filter is the new firewall for openbsd. Openbsd.org
IPTables is the newish firewall for linux
IPChains i the old firewall for linux and I recommend going with IPTables. IPTables has more functionality.

If you want packet capturing there are two routes you can go.

1. NIDS (Network Intrusion Detection System): Go with snort, it is one of the best free NIDSes out there. snort.org

1. Packet analyzer: Go with ethereal. It has a nice easy gui and quite a bit of functionality. ethereal.org I believe
 
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