This is a roughhewn list of communication between starp and other networks internal to BNL.  Initially, most of it is pulled from the *limited* sFlow sampling available on some starp network switches during the week of Sept. 12, 2016.  Additional items may be added based on other monitoring or known uses.  Yellow highlighted entries are connections known to originate from outside starp.

External System(s)	STARP System(s)	Explanation/Notes
dean.star.bnl.gov	Online Linux Pool (OLP)	subsystem monitoring generating online web content (writing over NFS)
dean.star.bnl.gov	interactive systems	web browsing
dean.star.bnl.gov	Windows and Linux systems	OCS inventory agent sending data to dean (I don't recall - is this initiated by dean or the agents?)
dean.star.bnl.gov	(mostly) Linux systems	Ganglia gmonds sending data to dean
sun.star.bnl.gov	Linux systems	SKM clients contacting starkeyd
sun.star.bnl.gov	interactive systems	web browsing
db0{6,7,8}.star.bnl.gov	OLP	offline database servers used by jobs running on OLP
f5-http-vip.sec.bnl.local	various	BNL outbound web proxy server?
nx06.rcf.bnl.gov	xeon-phi-dev	observed this particular pair, but know there are more widely used RCF NX <--> starp
scannerXX.bnl.gov	everything	not actually seen in sFlow, but of course it is present
ordo.bnl.gov	Linux systems	Ordo, ITD's Linux/Unix system inventory software
secadm3.itd.bnl.gov	Linux systems	remote syslog
stargrid0{2,3,4}.rcf.bnl.gov	OLP	GridFTP transfers initiated on OLP
stargrid01.rcf.bnl.gov	stargw3	Grid job submission (eg, nightly library tests), not actually seen in sFlow, but known to occur.
rafs{02,03,21,22,24}.rcf.bnl.gov	Linux systems	AFS - could easily be more AFS servers/services involved
various	stargw{4,5}	inbound SSH connections (not actually seen in sFlow, because stargw machines are connected directly to ITD switch)
bnldc1.itd.bnl.gov	Windows systems	Windows Domain Controller (possibly others?)
splunk{2,3,4,6}.itd.bnl.gov	Windows systems	Splunk remote logging, possibly other splunk servers are present
bnl-dns{1,2}.itd.bnl.gov	Windows systems	NetBIOS name resolution?
bnldccore.itd.bnl.gov	Windows systems	Windows domain stuff?
wsus.b459.bnl.gov	Windows systems	ITD's internal MS/Windows update server
mir.itd.bnl.gov	Windows systems	?
itd-trend11.bnl.gov	Windows systems	ITD's TrendMicro server - others?
sao-ldms.b459.bnl.gov	Windows systems	Landesk
various ITD backup systems	Various Windows and Linux systems	Legato/Networker and Avamar backup systems
mirror.bnl.gov	Scientific Linux systems	Scientific Linux repositories
rhn.bnl.gov	Red Hat servers	Red Hat updates

Miscellaneous notes from sFlow observations

The oddest thing seen (and a little worrisome): fmsled.starp.bnl.gov talking to ec2-54-86-95-154.compute-1.amazonaws.com (over https, port 443)

There's also a bunch of multicast and network device chatter.