is it possible to look at the logs in pfsense that show me which connections were made at an earlier time?
From the WLAN & LAN to the WAN I would imagine you could install Squid with user authentication
and SARG for reporting then. It all depends on the traffic it selfs and the amount of log files that will
be produced. But if all is going through the Squid proxy w/ user authentication you will exactly knowing
who was doing what and at which time.
for example, i am looking at the rrd graphs and see that my connection was heavily used between 4-5am, but i don't know how i can see who was using the connection at that time.
That is more then a real time monitoring but you was asking for a longer time ago usage first.
What you want exactly now? Or both?
i am not looking for it to tell me someone was streaming youtube (although, that would be nice), i would want to see the LAN IP and what IP it was connected to, or something along those lines.
It would be able to realize but then the WLAN should be secured by a radius server and for guests
over a Captive Portal otherwise or if this be an open WLAN as a HotSpot you will never be ale to see
who was it, if the whole street is surfing over your AP or pfSense.
do i need to implement a syslog server and log everything to that?
A small RaspBerry PI 2.0 with the new WD 314 GB HDD one will be sufficient to realize many more things together with;
syslog-ng, MRTG & CACTI
ELK (ElasticSearch, Logstash, Kibana)
on pfSense directly w/ Squid & SquidGuard & SARG
is there a place to set how much storage can be used by ntop? will it recycle storage when it needs more space? i want to make sure i don't crash my box by letting the hard drive pfsense runs on fill up.
Then add a bigger HDD/SSD or set up a small Intel NUC connected to a monitor where you can install or
run the following things.
PRTG Network Monitor
Scrutinizer
WireShark
F.l.a.v.i.o.
Splunk
I would more have a look for the following two thinks
Squid & SquidGuard + SARG plus
PRTG on an Intel NUC or ELK
syslog-ng & MRTG & CACTI on a RAPI