rfc1918 ignorant

Wed Jul 23 13:10:13 UTC 2003

I agree... The only problem is if you filter all inbound RFC 1918 and 
inadvertently block ICMP messages from their routers on rfc1918 space. That 
could potentially cause issues with network connectivity related to MTU, etc...

At 08:59 AM 7/23/2003, Dave Temkin wrote:

>Is this really an issue?  So long as they're not advertising the space I
>see no issue with routing traffic through a 10. network as transit.  If
>you have no reason to reach their router directly (and after Cisco's last
>exploit, I'd think no one would want anyone to reach their router directly
>:-) ), what's the harm done?
>
>RFC1918 merely states that it shouldn't be routed on the global internet,
>not that it can't be used for transit space.
>
>
>
><--------------------------->
>
>Is there a site to "report" networks/isps that still leak rfc1918 space?
>By leaking I not only mean "don't filter", but actually _use_ in their
>network?
>
>If someone is keeping a list, feel free to add ServerBeach.com. All
>traceroutes to servers housed there, pass by 10.10.10.3.
>
>traceroute to www.serverbeach.com
>...
>20. 64-132-228-70.gen.twtelecom.net
>21. 10.10.10.3
>22. 66.139.72.12
>
>Kind Regards,
>Frank Louwers
>
>--
>Openminds bvba                www.openminds.be
>Tweebruggenstraat 16  -  9000 Gent  -  Belgium
>  --
>David Temkin

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