I would imagine it's IP Spoofing. I get quite a few of these in ISA2k, but at least it tells you that it's received the packet on the wrong interface and drops it. Regards, Steve Steve Lunn - PC & Network Support Microsoft MCP DDI: 01423 855101 Fax: 01423 855181 -----Original Message----- From: Ball, Dan [mailto:DBall@xxxxxxxxxxx] Sent: 16 March 2005 14:59 To: [ISAserver.org Discussion List] Subject: [isalist] RE: Port Scans http://www.ISAserver.org Does anyone have an answer on this other than laughter? -----Original Message----- From: Ball, Dan [mailto:DBall@xxxxxxxxxxx] Sent: Tuesday, March 15, 2005 10:25 To: [ISAserver.org Discussion List] Subject: [isalist] Port Scans http://www.ISAserver.org I get an lot of these alerts on my ISA2004 server: ISA Server detected an all port scan attack from Internet Protocol (IP) address xx.xx.xx.xx. Normally, I just ignore these, as there isn't much I can do about outside servers. However, I've noticed a few of these with IP addresses on our internal network, which has me concerned. Whenever I see one of these, I check every log I can think of, and don't find any other indication of any activity other than the alert itself. Even the Firewall Log doesn't show any blocked packets during that time period. Do you think the IP address of the scanner is being spoofed? ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 Exchange Server Resource Site: http://www.msexchange.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: steve.lunn@xxxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=isalist Report abuse to listadmin@xxxxxxxxxxxxx Homeowners Group consists of Homeowners Friendly Society Limited (HFSL), Registered and Incorporated under the Friendly Societies Act 1992, Reg. No. 964F, Homeowners Investment Fund Managers Limited (HIFML), Reg. No. 3224780, Homeowners Financial Administration Limited (HFAL), Reg. No. 4301736, Homeowners Membership Services Limited (HMSL), Reg. No. 3091667 and UK Friendly Insurance Services Limited (UKFISL), Reg. No. 3088162, all registered at Hornbeam Park Avenue, Harrogate. HG2 8XE. Tel: 01423 855000 Web: http://www.homeowners.co.uk HFSL and HIFML are both authorised and regulated by the Financial Services Authority (FSA). HFSL's FSA Register no. is 110072, HIFML's FSA Register no. is 181487. You can check this on the FSA's Register by visiting the FSA's website http://www.fsa.gov.uk/register or by contacting the FSA on 0845 606 1234 HFAL, HMSL and UKFISL are non-regulated limited companies. United Kingdom Civil Service Benefit Society (UKCSBS) and United Kingdom Armed Forces Benefit Society (UKAFBS) are trading styles of Homeowners Friendly Society Limited This e-mail is intended only for the person named as recipient. The contents are confidential. If you are not the intended recipient of this e-mail, please notify us as soon as possible and delete it. If you are not the intended recipient of the e-mail, any use by you is prohibited.