Network Monitoring tools

Hello,

Is there any good network monitoring tools available?

I need to monitor our 3 T-1 that is connected to our 3 sites via Checkpoint VPN.  We did notice some performance hit and high latency.

Has anyone heard of Opsmanager from AdventNet?

Thanks
yipster222Asked:
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ded9Connect With a Mentor Commented:
There are many network montioring tools But if you want the best which is mostly used by network prof. and security prof. is
Click the link below

http://www.gfi.com/nsm/?adclickid=7630611

Reps
 
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harbor235Commented:
This is an awesome tool:

http://www.sins.com.au/nmis/

harbor235 ;}
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WrathyimpCommented:
SolarWinds Engineer Edition
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