> Thank you very much. I've checked the file , they have the following content: /proc/sys/net/ipv4/conf/all/rp_filter : 1 /proc/sys/net/ipv4/conf/default/rp_filter: 0 /proc/sys/net/ipv4/conf/eth0/rp_filter: 0 /proc/sys/net/ipv4/conf/lo/rp_filter: 0 the ip route says: [root@xxxxxx lo]# ip route 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.1 210.32.131.0/24 dev eth0 proto kernel scope link src 210.32.131.166 127.0.0.0/8 dev lo scope link default via 210.32.131.1 dev eth0 default via 210.32.131.1 dev eth0 src 210.32.131.166 metric 1 [root@xxxxxx lo]# I don't understand what's the files under all/ and default/ for. And the tcpdump on linuxbox and snoop on Sun both shows icmp echo request and icmp echo reply has been received. But why 'ping 210.32.131.97' always show nothing when executed on 192.168.1.8? James Shen > 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 > >
