do anybody know, whether is it possible to route packets incoming to ethernet interface as broadcasts?
~~~~~|WirelessDevice/WD|-----eth0-|LinuxRouter/RT|-eth1---(10.18.63.0/24)
tcpdump: listening on eth0 0:a:e6:ac:e8:7a ff:ff:ff:ff:ff:ff 98: 192.168.7.11 > 10.18.63.249: icmp: echo request (DF) 0:a:e6:ac:e8:7a ff:ff:ff:ff:ff:ff 98: 192.168.7.11 > 10.18.63.249: icmp: echo request (DF)
Please notice, that echo request packets are in ethernet frames, heading to broadcast address (ff:ff:ff:ff:ff:ff).
Linux kernel seems to be, that refuse to route such packets (not intented for the MAC address of eth0 interface). But that interface received that packets, as seen in running tcpdump session. When that frames has "correct" MAC addresses, I mean destination is not a broadcast address, the same packet (source IP, destination IP) is routed without any problem.
Do you have any explanation, for this? Or better, does any linux networking guru know some magic, how to make linux kernel start routing also broadcasted packets?
Any help will be much appreciated. Also, when more info, why I see such packets is needed, I'm ready to serve.
Best regards
mARTin
-- Martin Rusko PhD student Department of Automation and Measurement Faculty of Mechanical Engineering Slovak University of Technology -- E-mail: rusko@sunsite.mine.nu Web: http://sunsite.mine.nu/~rusko -- motto: We are Microsoft! Resistance is futile. Open your source code and prepare for assimilation. - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
