On Fri, Apr 12, 2002 at 08:35:58PM +0200, [EMAIL PROTECTED] wrote: > because you cannot route traffic through a RFC 1918 addressed LAN destined > to the internet. Some reasons: > 1. traffic MUST be NAT'ed on the gateway masquerading the 10. subnet and > therefore the 10. subnet is unreachable from the internet. > 2. it's not allowed by IANA to route IPs of in RFC 1918 defined subnets into > the internet > 3. no other ISP ever will set up a route into a 10 subnet and so your hosts > stay unreachable.
As long as a host (actually mostly a router) doesn't require to have global connectivity it can hold a private IP. That's what the major ISP's do on their routers to save valuable IP's from being wasted on the router interfaces. However, these private IP's will not get propagated past the ISP's AS at the peering points and hence no global connectivity. Having said this, for an Internet customer (who apparently wants to have global connectivity) it's absolutely ridiculous to get assigned a private IP with this promise that the ISP will NAT that. If a one-to-one relationship exists between that private address and that public IP, why not assigning that public IP to the customer in the first place. Who is your ISP anyway? Ramin
