getting routes from internet facing routers

[martin <martiniscool () gmail com>]

Hi All

I've always heard as best practice that you should keep your internal
routes off external facing routers.  And I've also heard that it's
possible to get routes from a router/firewall facing the public domain
without having to login to it.  Can anybody explain (or give an
example) of how this is achieved ?  Is it by using ICMP ?  Does this
only apply to routers using dynamic routing or does it also apply to
static routes ?

Thanks in advance !
M

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