HI Techcies!

Can anybody recommend an OPen source SNMP Server with Graphical User interface to manage SYSlog messages frm Cisco routers.It shd privide tollowing features?

1.Interface UP/Down Status.( Notification thr'e-mail when there is failure.

2.Abnormal traffic activitis.( to monitor External threats)

3.Need to do Excellant customised Filtering.

4.Graphical Trend Anaysis of Traffic,failures etc!

May be we may not have a single tool to do all that specified.

I welcome differnet tools and their usage.

Vanna