How can I figure out the link speed needed for a link between RSA Netwitness and log sources which give 500 events per second??
Please help asap.
You could use something like the following.
1 device sending at 500eps and not knowing the event source let's use a size of 450 bytes per message.
We would multiple the 450*500 which gives us 225,000 bytes or 1.8 Megabits on the wire.
This would be the bandwidth consumption used to send those logs.
I made a lot of assumption here, but this is how I would go about calculating the required bandwidth
Hope this helps
I need a confirmed or at least almost confirmed size of the event, is 450 bytes almost confirmed?
I need this in order I make official decision in making a data link between our RSA SIEM and a client (log source).
I was using 450 as a most common size. However the size will change considerably with the event source. For example a Cisco ASA message is about 160bytes and a Windows Message around 600-700 and a IIS message can be over 1k.
I would need to know the devices that you are sending from to make a more estimated guess. If these device types are already sending into NW then you could use the reporting engine to give you a much closer estimate
You could run a report on event size.. and then divide by the number of events received for a given time
The log sources are the below:
- Cisco ASA.
- Cisco Firepower with snort.
- F5 Big-IP ASM v13.
- Microsoft Domain Controller.
- Cisco ASA. ->about 160 bytes
- Cisco Firepower with snort. 400-600 bytes
- F5 Big-IP ASM v13. 300-500
- Microsoft Domain Controller. 500-800 bytes
If you use a base of 700 bytes *500 EPS gives you about 350k bytes and then convert the to megabits is about 2.8 megabits on the wire
Again this is an estimation. But should be pretty close
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