>>>>> "Tom" == Tom Sharples <[email protected]> writes:
Tom> Hello all, We have several installations of embedded wireless Tom> routers (running slack on a 2.4 kernel) in which the gateway Tom> router_1 uses a Verizon 3G USB modem (ppp0) as its connection to Tom> the outside world, and one or more downstream router_2 have Tom> 5.8Ghz wireless links to router_1, and thus route traffic to the Tom> outside world through the same ppp0 3G connection. Tom> Verizon has a habit of constantly changing the ppp0 IP address Tom> often sometime several time per hour. I would like to figure out Tom> a way that the downstream router_2 can be made aware of that ppp0 Tom> address change at router_1 within a minute or two of it Tom> happening. The obvious way seemed to be running a cronjob Tom> traceroute from the router_2 to a known outside IP, with a limit Tom> of two of three hops, and grepping the first public IP and Tom> looking for the change. However, for some reason that shows the Tom> Verizon gateway router on their tower as the first public IP Tom> rather that the locally assigned ppp0 public IP address. Any Tom> suggestions for how to determine that ppp0 IP using standard Tom> tools and pref. without writing e.g. inter-router communications Tom> scripts etc. would be welcome. Tom> verizon_tower------------------[3G_modem(ppp0)]-[router_1]---------------[5.8Ghz_link]----------------[router_2] Have you considered tunnelling? E.g. with OpenVPN or something like it. -- Russell Senior, President [email protected] _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
