It was probably a large packet flood to random destination ports. Some of them happened to hit rshell. What really took out your routing procs was likely a huge packet flood, but due to volume you may not have been able to access normal interface counters (i.e. MRTG doesn't get any SNMP packets back when OSPF goes bye-bye). Mike ----- Original Message ----- From: "Vinny India" <vindia@ads.espire.net> To: <nanog@merit.edu> Sent: Monday, March 25, 2002 2:44 PM Subject: Possible New type of DOS attack

Anyone out there ever witness an attack were you received several RSHPORT attempts (5 per second) on a cisco router from different spoofed source addresses. It was capable of taking out BGP and OSPF sessions on the

router.