Uhh your math is wrong. You're assuming each packet is a new connection/etc.
I can saturate my backend 100 megabit network with 1 connection (rsync
backups). 5,000 connections per second is a reasonable amount of traffic
(5,000 simaltaneous emails, www sessions, DNS queries, etc, it's certainly
possible, and chances are it will consume a significant amount of
bandwidth).
-Kurt Seifried
An IPS should be placed in front of the firewall, to
provide complete network protection.
However, the Unity 50 is quite low spec - 5,000
connections per second, 5,000 concurrent connections.
Bearing in mind most Check Point firewalls have a
default connection table size of 40,000 (?)
connections, then putting the Unity 50 in front of
your firewall would be a bottleneck.
Assuming small packet size (512bits per packet), then
5,000 of these per second equates to just under 3Mbs.
If your Internet feed is less than this, then no
problem. If it's higher, then the Unity 50 would not
be able to handle a 3Mbs pipe full of small packets.
You should really design your perimeter with this
worse case scenario in mind, especially if you have
negotiated burst rates with your ISP and your ISP feed
can suddenly shoot up in usage.
Port scans should be blocked by the firewall - all
irrelevant ports are discarded at this point. I'm not
sure how the Unity 50 handles port scans, I haven't
played with one yet... ;)
Regards,
Matt
--- Doug Fox <dfox168@hotmail.com> wrote:
I'm sorry for this dumb question, which may have
been answered many times.
Where should one place an TippingPoint Unity 50 IPS
device? Behind or in
front of a firewall?
I have a/the TippingPoint behind a Check Point
firewall. Even though we
externally and internally port-scanned the firewall
and the IPS many times,
the activity log did not contain any record of the
"attacks".
What am I missing here? Any pointers are
appreciated.
Thanks,
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