Re: [LARTC] Why 'ping' only succeed in one direction?

[Krepper Guillermo <billy@ciudadglobal.com.ar>]

Hi
seems ok check /proc/sys/net/ipv4/conf/[*]/rp_filter
what it does is explained in the adv routing howto almost at the end.

Hope it helps


bye



> ----------------------------------- ( Ethernet)
>
>
> Sun-1              Linux              Sun-2
> 210.32.131.97  192.168.1.1(eth0)    192.168.1.8
>                210.32.131.166(eth0:0)
>
> Routing table :
>
>    Sun-1:    192.168.1.0/24   ---> 210.32.131.166
>                     default -----> 210.32.131.2
>
>    Linux  :    default---> 210.32.131.2
>               ( I add no explicit routing  table about the twodirect
>                connected network )
>
>   Sun-2 :    default --> 192.168.1.1







On Tuesday 29 May 2001 11:53 am, shen jing wrote:
> Hi:
>
> I'm using a linux box ( Rh7.1 ) as a router which connect two Solaris2.6
>
> box.
> The three computer is interconnected by ethernet, each computer has
> only on ethernet adapter.
>
> The following is my network connection :
>
> ----------------------------------- ( Ethernet)
>
>
> Sun-1              Linux              Sun-2
> 210.32.131.97  192.168.1.1(eth0)    192.168.1.8
>                210.32.131.166(eth0:0)
>
> Routing table :
>
>    Sun-1:    192.168.1.0/24   ---> 210.32.131.166
>                     default -----> 210.32.131.2
>
>    Linux  :    default---> 210.32.131.2
>               ( I add no explicit routing  table about the twodirect
>                connected network )
>
>   Sun-2 :    default --> 192.168.1.1
>
> While I exec "ping 192.168.1.8 "on Sun-1, it succeed, with 0% packet
> loss.
>
> But when I exec  "ping 210.32.131.97" on Sun-2, the ping always hang
> with no output, when I interrupt it with "Ctl-C', it shows "100% packet
> loss".
>
> I do tcpdump on linux and snoop on Sun to find out what happened, but
> all detailed record shows "ICMP echo requect/reply " has been delivered
> between Sun-1<-->linux, Linux<-->Sun-2
>
> And I can telnet/ftp between Sun-1 & Sun-2.
>
> Is there someone will do me a favor to explain why this happens ? Is
> there any configuration error with my linux box ?
>
> Thanks in advance and each word will be highly appreciated.
>
> James Shen
>
>
>
>
>
>
>
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