Hi James, UDP scanning with nmap (-sU) has been known to crash Cisco IOS version 12.0T, 12.0S, etc. -----Original Message----- From: James A. Hayes [mailto:jhayes@xxxxxxxxxxxxxxxxxx]=20 Sent: Monday, March 29, 2004 2:10 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] Port Scanning Has anyone seen where port scanning caused major network issues? Our security officer runs port scans on our network when ever she wants to and it never fails that our network then chugs down to a complete halt and we have to reboot our core switch to correct the problem. Any ideas or suggestions? =20 James A. Hayes Network Operations Manager & Assistant Vice-President The Peoples Bank & Trust Company =20 (work) 662.680.1667 (mobile) 662.401.0750 (fax) 662.680.1502 =20 =20 ******************************************************** This weeks sponsor Emergent Online. Emergent OnLine is the leading server-based computing consulting integration firm in the nation. Emergent OnLine delivers expert=20 consulting services you can depend on. http://www.go-eol.com ********************************************************** Useful Thin Client Computing Links are available at: http://thin.net/links.cfm *********************************************************** For Archives, to Unsubscribe, Subscribe or=20 set Digest or Vacation mode use the below link: http://thin.net/citrixlist.cfm ******************************************************** This weeks sponsor Emergent Online. Emergent OnLine is the leading server-based computing consulting integration firm in the nation. Emergent OnLine delivers expert consulting services you can depend on. http://www.go-eol.com ********************************************************** Useful Thin Client Computing Links are available at: http://thin.net/links.cfm *********************************************************** For Archives, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: http://thin.net/citrixlist.cfm