Information on how to configure IPsec Policy filters in Windows 2000 [and Windows XP?
http://nsa1.www.conxion.com/win2k/download.htma.k.a.http://www.nsa.gov[look for the NSA Security Recommendation Guide for Windows 2000 IPsec]http://csrc.nist.gov/itsec/guidance_W2Kpro.htmlhttp://www.systemexperts.com/tutors/HardenW2K101.pdfhttp://www.microsoft.com/technet/prodtechnol/winxppro/proddocs/ sag_IPSecsecplan.asphttp://www.microsoft.com/technet/itsolutions/network/maintain/ security/ipsecld.asphttp://support.microsoft.com/?kbid=313190http://support.microsoft.com/?kbid=301284http://www.microsoft.com/technet/security/bestprac/bpent/sec3/ ipsecloc.aspThe IPSECPOL.EXE tool is a free command line utility for configuring IPsec policies via automated batch file scripts:http://www.microsoft.com/windows2000/techinfo/reskit/tools/ existing/ipsecpol-o.aspIn addition to filtering traffic, IPsec rules can also be defined to enable encryption to secure communications between computers or servers. Information on this is available by searching the links below:http://support.microsoft.com/?kb