On Wednesday 24 October 2007, Etaoin Shrdlu wrote: > On Wednesday 24 October 2007, Mick wrote: > > Thanks guys. The AP has a reserved static LAN IP address on the > > router (10.10.10.13). It also has a MAC. So it is simply a matter of > > forwarding (all) ICMP echo-reply packets that arrive from the Internet > > to that LAN address. (On this implementation the AP is itself a > > Linksys wireless router). > > > > I wonder if I can play tricks with ping's ICMP headers to > > differentiate between them as they come into the router, or something > > clever that I haven't yet figured out. Any ideas? > > Disclaimer: I have not tested what follows. > > Can't you just use traceroute? > If you run tracert from windows, it should already work, since it uses > ICMP echo requests. Otherwise, you should open UDP port 33434 on the > router.
I don't have access to a MS Windows machine right now, but using mtr I get: ==================================================== [snip . . .] 23. XX-XX-XXX-XX.dhcp.kgpt.tn.cha 6.7% 15 145.5 145.4 143.2 146.9 1.3 24. ??? 100.0 15 0.0 0.0 0.0 0.0 0.0 25. XX.XX.XXX.XXX 6.7% 15 155.9 156.2 154.2 159.1 1.3 ==================================================== It seems that hop 23 is the dhcp server of the ISP. Hop 25. is the public IP address of the router. I assume that hop 24. is the cable modem which acts as a bridge(?). Since the AP is within the LAN and the connection to it is NAT'ed, it is not shown above. Am I correct in my thinking? -- Regards, Mick
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