I'll have to kick the people who wrote my TPC/IP manual then, and as of when I did sample tests for MCSE they also have the Class addresses wrong!
Whether you control the DHCP server or not you would still have to delecare the IP address range in firewall and mail server configs. Jenny -----Original Message----- From: Jochem van Dieten [mailto:[EMAIL PROTECTED] Sent: 08 January 2006 18:20 To: CF-Talk Subject: Re: SPF? How to use? Jennifer Gavin-Wear wrote: > SPF does help in scoring spam, I use it myself and it works alongside other > anti spam measures just fine. > > I'm not sure why you are talking about DHCP addresses as these are only used > on an internal network and not across the internet. DHCP, or a tunneled variant like IPCP, is commonly used by ISPs to assign IP adresses to their customers. > DHCP addresses are > issued on request from an address pool by a DHCP server, typically on the > Class A, B, C reserved IP ranges (10.x.x.x, 172.16.x.x and 192.168.1.x). The ranges reserved for private assignment are are actuall 10/8, 172.16/12 and 192.168/16 (see RFC 1918). > In situations where your IP address will vary because you are getting it > from a DHCP pool then it's impossible to do any authentication against the > IP address unless you allow/block the whole DHCP range. Or control the DHCP server :) Jochem ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228776 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
