>
> Hi there.
>
> Since a month ago our ISP started to use network 10.x.x.x to set up his
> side of P-t-P:
>
> > ippp0 Link encap:Point-to-Point Protocol
> > inet addr:212.216.141.209 P-t-P:10.31.92.42 Mask:255.255.255.255
> > UP POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
>
> Of course, the other end (our end) of p-t-p has a valid internet ip. The
> questions are:
>
> 1) I know that some RFC's says that a network 10.x.x.x cannot be used on
> internet. Does our isp pratice violates those RFCs?
Do a whois [EMAIL PROTECTED] to find the exact owner of the
IP. This practice doesnt violate RFC's if the are doing address translation,
NAT or masquerading. I would be pissed if I were being charge for the
IP address.
>
> 2) We are using network 10 for our internal networks. We have a lot of
> lan, so the chance to hit the same ip used by our ISP are not so far.
> Can this produce problems?
Yes.
>
> My guess is that the route of a p-t-p (that is netmasked
> 255.255.255.255) shouldn't hurt the internal lan in any case, but
> sometime I'm in doubt.
>
It wont hurt unless there is an IP collision. You ask your ISP what
range they are using within the 10. block. At worst the existing
machine wins and you ppp route is rejected and is forced to
redial.
Henri
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