GTEI Filtering ICMP Echo/Echo Replies?

Charles Sprickman spork at
Fri Dec 31 18:17:26 UTC 1999

>From ICON:

root at bigred[/var/www/apache/myadmin]# ping
PING ( 56 data bytes
--- ping statistics ---
4 packets transmitted, 0 packets received, 100% packet loss

>From Genuity:

motel-6 [/home/spork]# ping
PING ( 56 data bytes
64 bytes from icmp_seq=0 ttl=244 time=44.895 ms
64 bytes from icmp_seq=1 ttl=244 time=52.813 ms
64 bytes from icmp_seq=2 ttl=244 time=39.077 ms

As a bbn customer, I can say that we have not been informed of any such
policy, and they are not filtering for us.


On Fri, 31 Dec 1999, Martin, Christian wrote:

> Happy Y2K to all!  Looks as if GTEI has begun filtering ICMP type 0 and 8 (I
> hope that's all) through their backbone.  I heard that this was because of
> DoS threats, but I haven't seen any other commentary on the subject.  GTEIs
> NOC claims that they have made no changes.  From some places I can get
> through the network, but others fail.  CERFNet and others are clean.
> Traceroute works fine everywhere.  Has anyone else seen anything similar?
> Regards,
> Christian

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