I appreciate NOWS SBE 2.5 is no longer supported. Planned upgrade is not for a couple of months

Server is Knocking out the Internet Router within minutes !!

Server has shown slow downs from time to time .... but not within a couple of minutes Internet is unusable... can't even ping the Router's PC!!!

With Server taken out ALL 6 PC's work fine - internet is OK

Network tools say within 2 h 14Gb has been sent !!! 500mb received on ETH0

Any ideas pointers would be appreciated.