Re: Sending ICMP echo request out
Usuário do Sistema <[email protected]>
| Newsgroups | org.kernel.vger.linux-newbie,org.kernel.vger.netfilter |
|---|---|
| Message-ID | <CAMTjHrwBgz_m4zPdvsPTBw84at=47LfoLAkw8yF+FBmk91nspQ@mail.gmail.com> |
hi, if all it's right on router. it's possible that there are vlans setting on switch and the port System-1 and System-2 are in diffrent vlans. so I advisable you check the switch ports configurations as well as if there is any filter iptables rule. Em 8 de dezembro de 2011 17:59, Nikolay S. <[email protected]> escreveu: > В Пт., 09/12/2011 в 00:00 +0530, anil dahiya пишет: >> Hi , >> >> I have following setup with routing table as shown below: >> >> +-----------------------+ >> | System-1 | >> | "client" | >> |------------------------| >> | 192.168.11.5 | >> +----------------------+ >> | >> | >> +------+-----+ >> | Switch +----------------------+ >> +------+-----+ | >> | | >> | +-------------------------+ >> | | 192.168.11.1 | >> | |---------------------------| >> | | Router | >> | |-------------------------- | >> | | 192.168.12.1 | >> | +--------------------------+ >> | | >> | | >> +------------------------+ | >> | 192.168.11.6 | | >> |--------------------------| | >> | System-2 | | >> |--------------------------| | >> | 192.168.12.6 | | >> | |----------------+ >> +------------------------+ >> >> Routing table details of setup >> ------------------------------------------ >> System-1 >> ----- >> $route -n >> Kernel IP routing table >> Destination Gateway Genmask Flags Metric Ref Use Iface >> 192.168.11.0 0.0.0.0 255.255.255.0 U 1 0 0 eth1 >> 0.0.0.0 192.168.11.1 0.0.0.0 UG 0 0 0 eth1 >> >> >> Router >> ----------- >> $route -n >> Kernel IP routing table >> Destination Gateway Genmask Flags Metric Ref Use Iface >> 192.168.12.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 >> 192.168.11.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 >> >> >> System-2 >> ------ >> $route -n >> Kernel IP routing table >> Destination Gateway Genmask Flags Metric Ref Use Iface >> 192.168.12.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 >> 192.168.11.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 >> 0.0.0.0 192.168.12.1 0.0.0.0 UG 0 0 0 eth1 >> >> >> When I do ping from system-1 192.168.11.5 to system-2 192.168.12.6 , >> ping echo packet is reaching on system-2 through NIC 192.168.12.6 but >> system is not sending any response to 192.168.11.5 using either of NIC >> i.e 192.168.11.6 or 192.168.12.6 ? Why this is happening ? Can you >> help me ? >> >> I have observed same type of symtoms when I do SSH from 192.168.11.5 >> to 192.168.12.6 >> >> FYI, >> ip_forwarding is enable on router and iptables are no configured on >> any of system . > > I think, reverse path filtering is the problem here. > >> >> Thanks, >> Anil >> -- >> To unsubscribe from this list: send the line "unsubscribe netfilter" in >> the body of a message to [email protected] >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > -- > To unsubscribe from this list: send the line "unsubscribe netfilter" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html