FW: [Sunhelp] Question

Steel, Nick - TPNWS NSteel at sempra.com
Wed Aug 4 13:37:30 CDT 1999


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 H mm...I get this out of a Linux box.... 

[root at cbl-snicko /root]# traceroute yahoo.com -i eth1 
traceroute: Warning: yahoo.com has multiple addresses; using 204.71.200.245 

[root at cbl-snicko /root]# nslookup yahoo.com 
Server:  rns1.earthlink.net 
Address:  207.217.126.81 

Non-authoritative answer: 
Name:    yahoo.com 
Addresses:  204.71.200.245, 204.71.200.243 

So it looks like it has round robin DNS, but that still doesn't explain the
permission denied. What could control passing ICMP packets besides a proxy
or a firewall?

- N 


-----Original Message----- 
From: Paul Zimdars [ mailto:pzimdars at zerg.crazyfoo.org
<mailto:pzimdars at zerg.crazyfoo.org> ] 
Sent: Wednesday, August 04, 1999 11:35 AM 
To: Steel, Nick - TPNWS 
Cc: 'sunhelp at ohno.mrbill.net' 
Subject: RE: [Sunhelp] Question 


Can not be round robin DNS. Because it will still just grab the first ip 
of the list and traceroute to it. I can traceroute to it from any other 
box. 

Paul 


                         ''~`` 
                        ( o o ) 
+------------------.oooO--(_)--Oooo.------------------+ 
|Paul Zimdars                            (909)496-6040| 
|(909)496-6040       .oooO             www.zimcity.net| 
|                    (   )   Oooo.                    | 
+---------------------\ (----(   )--------------------+ 
                       _)    ) / 
                             (_/ 

On Wed, 4 Aug 1999, Steel, Nick - TPNWS wrote: 

> I don't think there's much you can fix. 
> 
> Yahoo uses a roundrobin DNS to spread the load over multiple servers, so 
> every time you do a lookup, you get a different IP address. 
> 
> As for checksums, I dunno what that means, hopefully someone with a bit 
> better insight into this could provide some info? 
> 
> The permission denied error is probably due to yahoo blocking icmp
packets. 
> 
> In short, nothing you can control.... 
> 
> - N 
> 
> 
> -----Original Message----- 
> From: Paul Zimdars [ mailto:pzimdars at zerg.crazyfoo.org
<mailto:pzimdars at zerg.crazyfoo.org> ] 
> Sent: Tuesday, August 03, 1999 11:17 PM 
> To: sunhelp at ohno.mrbill.net 
> Subject: [Sunhelp] Question 
> 
> 
> I get this when I try to run traceroute.. 
> I think it happened because I ran aset -l med 
> and it changed everything. 
> 
> Below: 
> [pzimdars at paul pzimdars]$ traceroute yahoo.com 
> traceroute: Warning: ckecksums disabled 
> traceroute: Warning: yahoo.com has multiple addresses; using 
> 204.71.200.245 
> traceroute: icmp socket: Permission denied 
> 
> How do I fix that by using super user? 
> 
> What does it all exactly mean? 
> 
> Paul Zimdars 
> 
> 
> 
>                          ''~`` 
>                         ( o o ) 
> +------------------.oooO--(_)--Oooo.------------------+ 
> |Paul Zimdars                            (909)496-6040| 
> |(909)496-6040       .oooO             www.zimcity.net| 
> |                    (   )   Oooo.                    | 
> +---------------------\ (----(   )--------------------+ 
>                        _)    ) / 
>                              (_/ 
> 
> 
> _______________________________________________ 
> SunHELP maillist  -  SunHELP at sunhelp.org 
> http://www.sunhelp.org/mailman/listinfo/sunhelp
<http://www.sunhelp.org/mailman/listinfo/sunhelp>  
> 


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<TITLE>RE: [Sunhelp] Question</TITLE>
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<P><FONT size=3D2><SPAN class=3D320544718-04081999><FONT =
color=3D#0000ff face=3DArial=20
size=3D2> H </FONT></SPAN>mm...I get this out of a Linux =
box....</FONT> </P>
<P><FONT size=3D2>[root at cbl-snicko /root]# traceroute yahoo.com -i =
eth1</FONT>=20
<BR><FONT size=3D2>traceroute: Warning: yahoo.com has multiple =
addresses; using=20
204.71.200.245</FONT> </P>
<P><FONT size=3D2>[root at cbl-snicko /root]# nslookup yahoo.com</FONT> =
<BR><FONT=20
size=3D2>Server:  rns1.earthlink.net</FONT> <BR><FONT =
size=3D2>Address: =20
207.217.126.81</FONT> </P>
<P><FONT size=3D2>Non-authoritative answer:</FONT> <BR><FONT=20
size=3D2>Name:    yahoo.com</FONT> <BR><FONT=20
size=3D2>Addresses:  204.71.200.245, 204.71.200.243</FONT> </P>
<P><FONT size=3D2>So it looks like it has round robin DNS, but that =
still doesn't=20
explain the permission denied. What could control passing ICMP packets =
besides a=20
proxy or a firewall?</FONT></P>
<P><FONT size=3D2>- N</FONT> </P><BR>
<P><FONT size=3D2>-----Original Message-----</FONT> <BR><FONT =
size=3D2>From: Paul=20
Zimdars [<A=20
href=3D"mailto:pzimdars at zerg.crazyfoo.org">mailto:pzimdars at zerg.crazyfoo=
.org</A>]</FONT>=20
<BR><FONT size=3D2>Sent: Wednesday, August 04, 1999 11:35 AM</FONT> =
<BR><FONT=20
size=3D2>To: Steel, Nick - TPNWS</FONT> <BR><FONT size=3D2>Cc:=20
'sunhelp at ohno.mrbill.net'</FONT> <BR><FONT size=3D2>Subject: RE: =
[Sunhelp]=20
Question</FONT> </P><BR>
<P><FONT size=3D2>Can not be round robin DNS. Because it will still =
just grab the=20
first ip</FONT> <BR><FONT size=3D2>of the list and traceroute to it. I =
can=20
traceroute to it from any other</FONT> <BR><FONT size=3D2>box.</FONT> =
</P>
<P><FONT size=3D2>Paul</FONT> </P><BR>
<P><FONT=20
size=3D2>          &nb=
sp;           &nb=
sp; =20
''~``</FONT> <BR><FONT=20
size=3D2>          &nb=
sp;           &nb=
sp;=20
( o o )</FONT> <BR><FONT=20
size=3D2>+------------------.oooO--(_)--Oooo.------------------+</FONT> =
<BR><FONT=20
size=3D2>|Paul=20
Zimdars          &nbsp=
;           &nbsp=
;    =20
(909)496-6040|</FONT> <BR><FONT=20
size=3D2>|(909)496-6040      =20
.oooO           =
 =20
www.zimcity.net|</FONT> <BR><FONT=20
size=3D2>|          &n=
bsp;        =20
(   )  =20
Oooo.           &=
nbsp;       =20
|</FONT> <BR><FONT size=3D2>+---------------------\ (----(  =20
)--------------------+</FONT> <BR><FONT=20
size=3D2>          &nb=
sp;           =20
_)    ) /</FONT> <BR><FONT=20
size=3D2>          &nb=
sp;           &nb=
sp;     =20
(_/</FONT> </P>
<P><FONT size=3D2>On Wed, 4 Aug 1999, Steel, Nick - TPNWS wrote:</FONT> =
</P>
<P><FONT size=3D2>> I don't think there's much you can fix. =
</FONT><BR><FONT=20
size=3D2>> </FONT><BR><FONT size=3D2>> Yahoo uses a roundrobin =
DNS to spread=20
the load over multiple servers, so</FONT> <BR><FONT size=3D2>> every =
time you=20
do a lookup, you get a different IP address. </FONT><BR><FONT =
size=3D2>>=20
</FONT><BR><FONT size=3D2>> As for checksums, I dunno what that =
means,=20
hopefully someone with a bit</FONT> <BR><FONT size=3D2>> better =
insight into=20
this could provide some info?</FONT> <BR><FONT size=3D2>> =
</FONT><BR><FONT=20
size=3D2>> The permission denied error is probably due to yahoo =
blocking icmp=20
packets. </FONT><BR><FONT size=3D2>> </FONT><BR><FONT size=3D2>> =
In short,=20
nothing you can control....</FONT> <BR><FONT size=3D2>> =
</FONT><BR><FONT=20
size=3D2>> - N</FONT> <BR><FONT size=3D2>> </FONT><BR><FONT =
size=3D2>>=20
</FONT><BR><FONT size=3D2>> -----Original Message-----</FONT> =
<BR><FONT=20
size=3D2>> From: Paul Zimdars [<A=20
href=3D"mailto:pzimdars at zerg.crazyfoo.org">mailto:pzimdars at zerg.crazyfoo=
.org</A>]</FONT>=20
<BR><FONT size=3D2>> Sent: Tuesday, August 03, 1999 11:17 PM</FONT> =
<BR><FONT=20
size=3D2>> To: sunhelp at ohno.mrbill.net</FONT> <BR><FONT =
size=3D2>> Subject:=20
[Sunhelp] Question</FONT> <BR><FONT size=3D2>> </FONT><BR><FONT =
size=3D2>>=20
</FONT><BR><FONT size=3D2>> I get this when I try to run =
traceroute..</FONT>=20
<BR><FONT size=3D2>> I think it happened because I ran aset -l =
med</FONT>=20
<BR><FONT size=3D2>> and it changed everything.</FONT> <BR><FONT =
size=3D2>>=20
</FONT><BR><FONT size=3D2>> Below:</FONT> <BR><FONT size=3D2>> =
[pzimdars at paul=20
pzimdars]$ traceroute yahoo.com</FONT> <BR><FONT size=3D2>> =
traceroute:=20
Warning: ckecksums disabled</FONT> <BR><FONT size=3D2>> traceroute: =
Warning:=20
yahoo.com has multiple addresses; using</FONT> <BR><FONT size=3D2>>=20
204.71.200.245</FONT> <BR><FONT size=3D2>> traceroute: icmp socket: =
Permission=20
denied</FONT> <BR><FONT size=3D2>> </FONT><BR><FONT size=3D2>> =
How do I fix=20
that by using super user?</FONT> <BR><FONT size=3D2>> =
</FONT><BR><FONT=20
size=3D2>> What does it all exactly mean?</FONT> <BR><FONT =
size=3D2>>=20
</FONT><BR><FONT size=3D2>> Paul Zimdars</FONT> <BR><FONT =
size=3D2>>=20
</FONT><BR><FONT size=3D2>> </FONT><BR><FONT size=3D2>> =
</FONT><BR><FONT=20
size=3D2>>         &nbsp=
;           &nbsp=
;   =20
''~``</FONT> <BR><FONT=20
size=3D2>>         &nbsp=
;           &nbsp=
;  =20
( o o )</FONT> <BR><FONT size=3D2>>=20
+------------------.oooO--(_)--Oooo.------------------+</FONT> =
<BR><FONT=20
size=3D2>> |Paul=20
Zimdars          &nbsp=
;           &nbsp=
;    =20
(909)496-6040|</FONT> <BR><FONT size=3D2>>=20
|(909)496-6040      =20
.oooO           =
 =20
www.zimcity.net|</FONT> <BR><FONT size=3D2>>=20
|           &nbsp=
;       =20
(   )  =20
Oooo.           &=
nbsp;       =20
|</FONT> <BR><FONT size=3D2>> +---------------------\ =
(----(  =20
)--------------------+</FONT> <BR><FONT=20
size=3D2>>         &nbsp=
;           &nbsp=
; =20
_)    ) /</FONT> <BR><FONT=20
size=3D2>>         &nbsp=
;           &nbsp=
;       =20
(_/</FONT> <BR><FONT size=3D2>> </FONT><BR><FONT size=3D2>> =
</FONT><BR><FONT=20
size=3D2>> _______________________________________________</FONT> =
<BR><FONT=20
size=3D2>> SunHELP maillist  -  SunHELP at sunhelp.org</FONT> =
<BR><FONT=20
size=3D2>> <A =
href=3D"http://www.sunhelp.org/mailman/listinfo/sunhelp"=20
target=3D_blank>http://www.sunhelp.org/mailman/listinfo/sunhelp</A></FON=
T>=20
<BR><FONT size=3D2>> </FONT></P></BODY></HTML>

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