ISPs Blocking Private Addresses?

Mon Feb 9 20:42:19 UTC 1998

Most people use what's commonly refered to as Martian filters to filter
out private address spacing.  It allows those ISPs to use private address
space internally and not have to worry about advertising them via external
routing protocols and also keeps them from accepting bogus route
announcements from other providers who haven't used the filters.

On Sun, 8 Feb 1998, Peter Ford wrote:

> Do most ISPs explicitly block private IP addresses (e.g. 10.X.X.X) at their
> borders?
> 
> Do the "default-less" ISPs filter private addresses or do they let
> routing/forwarding do the work?

Default-less?

> thanks, peter

Joe Shaw - jshaw at insync.net
NetAdmin - Insync Internet Services