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Hello, The Yahoo! Mail service uses servers in the *.mail.yahoo.com subdomain. So basically, it would take a rule to detect HTTP access to this subdomain, or access to http://mail.yahoo.com, which is the head of Yahoo! Mail. Unfortunately, adresses like f200.mail.yahoo.com, f102.mail.yahoo.com and f130.mail.yahoo.com are not conveniently located in the same IP network. You cannot simply specify an IP Address range in the rule, you would have to specify individual IP Addresses, which would take you forever. Plus Yahoo! probably changes these addresses every now and then, to make it more difficult for admins to block the service, so don't bother. It looks like Yahoo is doing everything they can to prevent security and IT people from restricting access to their web services. The IP Blocks hereunder are those of Yahoo's web services such as Mail, Messenger, Store, Ads, etc. I haven't checked all the services hosted in there. If you monitor accesses to these addresses, you'll have an idea of who's using Yahoo Mail, Yahoo Messenger, and other free Yahoo services. EC20-2-YAHOO1 : 216.136.172.0/22 EC20-2-YAHOO2 : 216.136.224.0/22 EC20-2-YAHOO3 : 216.136.128.0/22 EC20-2-YAHOO4 : 216.136.203.0/24 EC20-2-YAHOO5 : 216.136.232.0/22 EC20-2-YAHOO6 : 216.136.204.0/24 By blocking these address ranges, you would block many Yahoo services (including Mail), but I haven't figured all the entire list of services hosted in these ranges. The way the Yahoo IP network is setup makes it difficult to block access to some of their services, while leaving access to others, like allowing access to Mail, and blocking Messenger for instance). Note : the main Yahoo website is not located in theses ranges, the addresses are all in the 64.58.76.X address range. HTH Chris > Has anyone found out a way to detect a logon to > yahoo mail service with RealSecure? > Or any other method suggested? > > Thanks __________________________________________________ Do You Yahoo!? HotJobs - Search Thousands of New Jobs http://www.hotjobs.com
