On Fri, 7 Sep 2001, Thibault Bautze wrote:
>
> I found that you cannot ping this sites, even if I'm sitting on the firewall
> or connectet with my
> windows box directly to the internet.
> Here is the result for a ping:
>
> # ping www.gmx.de
> PING www.gmx.de (213.165.65.100): 56 data bytes
> 36 bytes from 62.156.128.226: Communication prohibited by filter
> Vr HL TOS Len ID Flg off TTL Pro cks Src Dst
> 4 5 00 5400 00ff 0 0000 fa 01 8d4c 217.1.yy.xx 213.165.65.100
> --- www.gmx.de ping statistics ---
> 16 packets transmitted, 0 packets received, 100% packet loss
>
> 62.156.128.226 is in this case the other side of the ppp tunel, my ISP (
> t-online,
> Germany if it can help )
>
> But I'm not sure if it makes a difference, if you can ping them or not. I
> got
> the same result with ping www.microsoft.com ( bad example, I know ; ) ) ,
> but I can open this site on my
> freebsd or windows box.
It makes a difference because the firewall is blocking ICMP which is used
to allow the maximum packet size negotiation.
>
>
> Thanks,
> Thibault Bautze
>
>
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